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• Win7 playback of dvr-ms files stutters

  - by Jim Lynn

  I've just had to install Windows 7 on my Media Center machine because my Vista installation had a faulty drive. I've got the latest drivers that I can find - Intel 945GM integrated Graphics, Realtek audio drivers. Things are working OK with one exception. Playback of old recordings, from dvr-ms format files, is choppy. The picture freezes for a fraction of a second, then quickly catches up. The sound is uninterrupted and doesn't pause. These freezes happen once every 5 seconds or so. It's very regular. Playback of Live TV from the digital tuner is perfectly smooth. DVD playback is perfectly smooth. As an experiment, I used the MPEG editing package VideoReDo to create a small test file in three different formats. This program takes the raw MPEG streams and repackages them into the desired container. I took the same clip and created three files in three formats: dvr-ms (Microsoft's old recorded TV format); mpg (standard MPEG); and ts (raw MPEG transport stream of the kind often produced by PVRs). When these three files are played back under Windows 7, the mpg and ts files play smoothly, but the dvr-ms file stutters. The last piece of data I have is that two other Windows 7 machines can play back dvr-ms files smoothly with no stuttering. One is a netbook, with less grunt than the media centre. So there must be something specific about my Media Center machine that's causing the problem. Does anyone have any idea where I can look now? I don't know much about AV software, codecs, filter graphs etc. but I suspect that's where the problem lies. Rendering the video isn't the problem, but extracting the streams is. How would I go about diagnosing the problem? Edited to add: I just used the GraphStudio tool to look at the filter graph on the offending PC. The filter graph it uses by default for dvr-ms looks identical to the other machines, and, interestingly, when I play the files using GraphStudio they run smoothly. Under Windows Media Player and Windows Media Center they stutter. I'd like to see the filter graph for WMP but GraphStudio won't show it. It looks like WMP and WMC are using a different decoding path to GraphStudio. Edited again to add: Today I purchased a new HDTV. The same Media Center driving the TV at 1080p is now playing back the old Recorded TV files smoothly, without stuttering. So whatever the cause of the original problem, using a different resolution seems to have removed the problem. It might also explain why nobody else has had this problem. I doubt many people use Media Centre with a 14in portable TV.

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• mount_afp on linux, user rights

  - by Antonio Sesto

  I need to mount a remote filesystem on a linux box using the afp protocol. The linux box runs an old Debian 4. I downloaded the source code of mount_afp, compiled it and installed it with all the required packages. Then created /etc/fuse with the following command: mknod /dev/fuse c 10 229 (according to the instructions here) I can mount the remote filesystem as root by executing: mount_afp afp://USER:PASSWD@REMOTE_SERVER/FOLDER /mnt/MOUNTPOINT/ but the same command fails when run as normal user (of the local machine). After reading here and there, I created a group fuse, and added my normal user U to the group fuse: [prompt] groups U U fuse Then modified the group of /dev/fuse, that now has the following rights: 0 crwxrwx--- 1 root fuse 10, 229 Feb 8 15:33 /dev/fuse However, if the user U tries to mount the remote filesystem by using the same command as above, U gets the following error: Incorrect permissions on /dev/fuse, mode of device is 20770, uid/gid is 0/1007. But your effective uid/gid is 1004/1004 But the user U with uid 1004 has also gid 1007 (group fuse). I might think the problem is related to real/effective/etc. ID, but I do not know how to proceed and could not find any clear instructions. Could you please help me? There is also another problem. If I mount /mnt/MOUNTPOINT as root and run ls -l /mnt, I get: drwxrwxrwx 15 root root 466 Feb 8 16:34 MONTPOINT If I run ls -l /mnt as normal user U I get: ? ?????????? ? ? ? ? ? MOUNTPOINT in fact when I try to cd /mnt/MOUNTPOINT I get: $-> cd /mnt/MOUNTPOINT -sh: cd: /mnt/MOUNTPOINT: Not a directory Then I unmount /mnt/MOUNTPOINT as root and run again ls -l /mnt as normal user U I get: 0 drwxr-xr-x 2 root root 6 Feb 8 15:32 MOUNTPOINT/ After reading Frank's answer, I killed every shell/process running with privileges of user U. Still U cannot mount the remote filesystem, but the error message has changed. Now it is: "Login error: Authentication failed". The problem is not related to remote login/password since the same command works perfectly when run as root of the local machine. Since I cannot get mount_afp to work with normal users, I decided to follow mgorven's suggestion. So I run the commands: mount_afp -o allow_other afp://USER:PASSWD@REMOTE_SERVER/FOLDER /mnt/MOUNTPOINT/ and mount_afp -o user=U afp://USER:PASSWD@REMOTE_SERVER/FOLDER /mnt/MOUNTPOINT/ The mount succeeds but user U cannot access the mount point. If U executes ls -l in /mnt U@LOCAL_HOST [/mnt] $-> ls -l ls: cannot access MOUNT_POINT: Permission denied total 0 ? ?????????? ? ? ? ? ? MOUNT_POINT Is it so hard to have this utility working?

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• passwd ldap request to ActiveDirectory fails on half of 2500 users

  - by groovehunter

  We just setup ActiveDirectory in my company and imported all linux users and groups. On the linux client: (configured to ask ldap in nsswitch.conf): If i do a common ldapsearch to the AD ldap server i get the complete number of about 2580 users. But if i do this it only gets a part of all users, 1221 in number: getent passwd | wc -l Running it with strace shows kind of attempt to reconnect My ideas were: Does the linux authentication procedure run ldapsearch with a parameter incompatible to AD ldap ? Or probably it is a encoding issue. The windows user are entered in AD with all kind of characters. Maybe someone could shed light on this and give a hint how to debug that further!? Here's our ldap.conf host audc01.mycompany.de audc03.mycompany.de base ou=location,dc=mycompany,dc=de ldap_version 3 binddn cn=manager,ou=location,dc=mycompany,dc=de bindpw Password timelimit 120 idle_timelimit 3600 nss_base_passwd cn=users,cn=import,ou=location,dc=mycompany,dc=de?sub nss_base_group ou=location,dc=mycompany,dc=de?sub # RFC 2307 (AD) mappings nss_map_objectclass posixAccount User # nss_map_objectclass shadowAccount User nss_map_objectclass posixGroup Group nss_map_attribute uid sAMAccountName nss_map_attribute cn sAMAccountName # Display Name nss_map_attribute gecos cn ## nss_map_attribute homeDirectory unixHomeDirectory nss_map_attribute loginShell msSFU30LoginShell # PAM attributes pam_login_attribute sAMAccountName # Location based login pam_groupdn CN=Location-AU-Login,OU=au,OU=Location,DC=mycompany,DC=de pam_member_attribute msSFU30PosixMember ## pam_lookup_policy yes pam_filter objectclass=User nss_initgroups_ignoreusers avahi,avahi-autoipd,backup,bin,couchdb,daemon,games,gdm,gnats,haldaemon,hplip,irc,kernoops,libuuid,list,lp,mail,man,messagebus,news,proxy,pulse,root,rtkit,saned,speech-dispatcher,statd,sync,sys,syslog,usbmux,uucp,www-data and here the stacktrace from strace getent passwd poll([{fd=4, events=POLLIN|POLLPRI|POLLERR|POLLHUP}], 1, 120000) = 1 ([{fd=4, revents=POLLIN}]) read(4, "0\204\0\0\0A\2\1", 8) = 8 read(4, "\4e\204\0\0\0\7\n\1\0\4\0\4\0\240\204\0\0\0+0\204\0\0\0%\4\0261.2."..., 63) = 63 stat64("/etc/ldap.conf", {st_mode=S_IFREG|0644, st_size=1151, ...}) = 0 geteuid32() = 12560 getsockname(4, {sa_family=AF_INET, sin_port=htons(60334), sin_addr=inet_addr("10.1.35.51")}, [16]) = 0 getpeername(4, {sa_family=AF_INET, sin_port=htons(389), sin_addr=inet_addr("10.1.5.81")}, [16]) = 0 time(NULL) = 1297684722 rt_sigaction(SIGPIPE, {SIG_DFL, [], 0}, NULL, 8) = 0 munmap(0xb7617000, 1721) = 0 close(3) = 0 rt_sigaction(SIGPIPE, {SIG_IGN, [], 0}, {SIG_DFL, [], 0}, 8) = 0 rt_sigaction(SIGPIPE, {SIG_DFL, [], 0}, NULL, 8) = 0 rt_sigaction(SIGPIPE, {SIG_IGN, [], 0}, {SIG_DFL, [], 0}, 8) = 0 write(4, "0\5\2\1\5B\0", 7) = 7 shutdown(4, 2 /* send and receive */) = 0 close(4) = 0 shutdown(-1, 2 /* send and receive */) = -1 EBADF (Bad file descriptor) close(-1) = -1 EBADF (Bad file descriptor) exit_group(0) = ?

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• Installing drivers for switchable graphics

  - by Anonymous

  I recently bought a laptop that came with Windows 7 64-bit installed. I have some older (16-bit and 32-bit) software that doesn't work with 64-bit Windows, but works just fine with 32-bit. Since I also wanted to get rid of all of the pre-installed spam, I decided to wipe the hard drive and install a fresh copy of Windows 7 32-bit. I can't get the graphics cards working. This laptop uses switchable graphics, an Intel card and a Radeon card. I first tried installing this driver from Intel, which works for the Intel card. Of course, the Radeon card doesn't work with this driver and I need it for some of the newer games I have. I also tried this driver. Windows's device manager will recognize the Radeon card, but it will still use the Intel card. Also, even though that package says it contains the Intel driver, the Intel card still isn't properly recognized by Windows (leaving me with a nasty 800x600 resolution). On top of that, the Catalyst Control Center won't open (saying "The Catalyst Control Center is not supported by the driver version of your enabled graphics adapter") I tried installing HP's driver then installing Intel's driver on top of it. Device manager will then recognize both graphics cards properly. However, the laptop still uses the Intel card. The CCC still won't start (saying the same thing as before) and I can't find any of 'switching' graphics cards. Before formatting, I could right-click the desktop and click "Configure Switchable Graphics" This option hasn't been in the context menu regardless of what driver(s) I've installed. After some research, I found out that this menu entry runs the command "cli.exe Start PowerXpressHybrid" I've tried manually running this command, but I get the same unsupported message from CCC. So, does anyone know how I can get this working? I would like to be able to switch between the Intel and Radeon. But, if there's some way to disable the Intel and use only the Radeon, that would be fine I dual-boot with Linux (framebuffer uses the Intel, haven't even tried getting X set up yet) Here's the output of lspci # lspci -v | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller]) 01:00.0 VGA compatible controller: ATI Technologies Inc NI Seymour [AMD Radeon HD 6470M] (prog-if 00 [VGA controller]) The laptop is a HP Pavilion g6t-1d00. HP doesn't support installing anything but Windows 7 64-bit, so calling tech support isn't an option. Thanks for any help UPDATE: I finally got it working. After a fresh install of Windows 7, I installed the HP driver (the one linked above). Then, there's an optional Windows update I installed (don't remember the exact name, but it'll stick out). After that, graphics switching works just like it's supposed to. Moab, thanks anyways for your help

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• Disk performance below expectations

  - by paulH

  this is a follow-up to a previous question that I asked (Two servers with inconsistent disk speed). I have a PowerEdge R510 server with a PERC H700 integrated RAID controller (call this Server B) that was built using eight disks with 3Gb/s bandwidth that I was comparing with an almost identical server (call this Server A) that was built using four disks with 6Gb/s bandwidth. Server A had much better I/O rates than Server B. Once I discovered the difference with the disks, I had Server A rebuilt with faster 6Gbps disks. Unfortunately this resulted in no increase in the performance of the disks. Expecting that there must be some other configuration difference between the servers, we took the 6Gbps disks out of Server A and put them in Server B. This also resulted in no increase in the performance of the disks. We now have two identical servers built, with the exception that one is built with six 6Gbps disks and the other with eight 3Gbps disks, and the I/O rates of the disks is pretty much identical. This suggests that there is some bottleneck other than the disks, but I cannot understand how Server B originally had better I/O that has subsequently been 'lost'. Comparative I/O information below, as measured by SQLIO. The same parameters were used for each test. It's not the actual numbers that are significant but rather the variations between systems. In each case D: is a 2 disk RAID 1 volume, and E: is a 4 disk RAID 10 volume (apart from the original Server A, where E: was a 2 disk RAID 0 volume). Server A (original setup with 6Gpbs disks) D: Read (MB/s) 63 MB/s D: Write (MB/s) 170 MB/s E: Read (MB/s) 68 MB/s E: Write (MB/s) 320 MB/s Server B (original setup with 3Gpbs disks) D: Read (MB/s) 52 MB/s D: Write (MB/s) 88 MB/s E: Read (MB/s) 112 MB/s E: Write (MB/s) 130 MB/s Server A (new setup with 3Gpbs disks) D: Read (MB/s) 55 MB/s D: Write (MB/s) 85 MB/s E: Read (MB/s) 67 MB/s E: Write (MB/s) 180 MB/s Server B (new setup with 6Gpbs disks) D: Read (MB/s) 61 MB/s D: Write (MB/s) 95 MB/s E: Read (MB/s) 69 MB/s E: Write (MB/s) 180 MB/s Can anybody suggest any ideas what is going on here? The drives in use are as follows: Dell Seagate F617N ST3300657SS 300GB 15K RPM SAS Dell Hitachi HUS156030VLS600 300GB 3.5 inch 15000rpm 6GB SAS Hitachi Hus153030vls300 300GB Server SAS Dell ST3146855SS Seagate 3.5 inch 146GB 15K SAS

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• Forbidden access on Apache in Mac Lion

  - by Luis Berrocal

  I'm trying to configure Apache to work with Symfony in my Macbook Pro. I Have installed Lion OSX. I uncommented the line Include /private/etc/apache2/extra/httpd-vhosts.conf on /etc/apache2/httpd.conf. I configured Apache by editing the /private/etc/apache2/extra/httpd-vhosts.conf. and adding the following: :: NameVirtualHost *:80 <VirtualHost *.80> ServerName localhost DocumentRoot "/Library/WebServer/Documents" </VirtualHost> <VirtualHost *:80> DocumentRoot "/Users/luiscberrocal/Documents/dev/lion_test/web" ServerName lion.localhost <Directory "/Users/luiscberrocal/Documents/dev/lion_test/web"> Options Indexes FollowSymlinks AllowOverride All Order allow,deny Allow from all </Directory> </VirtualHost> 3. Added the following to /private/etc/hosts 127.0.0.1 lion.localhost Now when I access http://localhost/test.php I get the following message Forbidden You don't have permission to access /test.php on this server. Apache/2.2.20 (Unix) DAV/2 PHP/5.3.6 with Suhosin-Patch Server at localhost Port 80 I already tried: chmod 777 test.php chmod +x test.php I get the same message if I try to access http://lion.localhost/ I opened the /var/log/apache2/error_log and this is what I found relevant: [Sat Dec 31 09:37:49 2011] [notice] Apache/2.2.20 (Unix) DAV/2 PHP/5.3.6 with Suhosin-Patch configured -- resuming normal operations [Sat Dec 31 09:37:53 2011] [error] [client ::1] (13)Permission denied: access to /test.php denied [Sat Dec 31 09:37:55 2011] [error] [client ::1] (13)Permission denied: access to /test.php denied [Sat Dec 31 09:38:13 2011] [notice] caught SIGTERM, shutting down [Sat Dec 31 09:38:13 2011] [error] (EAI 8)nodename nor servname provided, or not known: Could not resolve host name *.80 -- ignoring! httpd: Could not reliably determine the server's fully qualified domain name, using Luis-Berrocals-MacBook-Pro.local for ServerName [Sat Dec 31 09:38:14 2011] [warn] mod_bonjour: Cannot stat template index file '/System/Library/User Template/English.lproj/Sites/index.html'. [Sat Dec 31 09:38:14 2011] [warn] mod_bonjour: Cannot stat template index file '/System/Library/User Template/English.lproj/Sites/index.html'. [Sat Dec 31 09:38:14 2011] [notice] Digest: generating secret for digest authentication ... [Sat Dec 31 09:38:14 2011] [notice] Digest: done [Sat Dec 31 09:38:14 2011] [notice] Apache/2.2.20 (Unix) DAV/2 PHP/5.3.6 with Suhosin-Patch configured -- resuming normal operations [Sat Dec 31 09:38:18 2011] [error] [client ::1] (13)Permission denied: access to /test.php denied [Sat Dec 31 09:38:19 2011] [error] [client ::1] (13)Permission denied: access to /test.php denied [Sat Dec 31 10:18:09 2011] [error] [client 127.0.0.1] (13)Permission denied: access to /test.php denied [Sat Dec 31 10:18:15 2011] [error] [client 127.0.0.1] (13)Permission denied: access to / denied I can't figure out what I'm doing wrong.

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• Error codes 80070490 and 8024200D in Windows Update

  - by Sammy

  How do get past these stupid errors? The way I have set things up is that Windows Update tells me when there are new updates available and then I review them before installing them. Yesterday it told me that there were 11 new updates. So I reviewed them and I saw that about half of them were security updates for Vista x64 and .NET Framework 2.0 SP2, and half of them were just regular updates for Vista x64. I checked them all and hit the Install button. It seemed to work at first, updates were being downloaded and installed, but then at update 11 of 11 total it got stuck and gave me the two error codes you see in the title. Here are some screenshots to give you an idea of what it looks like. This is what it looks like when it presents the updates to me. This is how it looks like when the installation fails. I'm not sure if you're gonna see this very well but these are the updates it's trying to install. Update: This is on Windows Vista Ultimate 64-bit with integrated SP2, installed only two weeks ago on 2012-10-02. Aside from this, the install is working flawlessly. I have not done any major changes to the system like installing new devices or drivers. What I have tried so far: - I tried installing the System Update Readiness Tool (the correct one for Vista x64) from Microsoft. This did not solve the issue. Microsoft resource links: Solutions to 80070490 Windows Update error 80070490 System Update Readiness Tool fixes Windows Update errors in Windows 7, Windows Vista, Windows Server 2008 R2, and Windows Server 2008 Solutions to 8024200D: Windows Update error 8024200d Essentially both solutions tell you to install the System Update Readiness Tool for your system. As I have done so and it didn't solve the problem the next step would be to try to repair Windows. Before I do that, is there anything else I can try? Microsoft automatic troubleshooter If I click the automatic troubleshooter link available on the solution web page above it directs me to download a file called windowsupdate.diagcab. But after download this file is not associated to any Windows program. Is this the so called Microsoft Fix It program? It doesn't have its icon, it's just blank file. Does it need to be associated? And to what Windows program?

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• Communication software wanted: email, sms, IM, phone calls [closed]

  - by user63835

  I am searching for a software solution that integrates / unifies my communication. I use email, instant messaging, SMS and phone. I would like to get all emails, SMS, instant messaging dialogs and meta-data about phone calls into one application. Important is that I can access all past communication with one application. There should be a global address-book to map the communication data to persons or organizations. I want all the communication data in one place to access and backup it easily. The software solution is not required to be multi-user application or server application. It is just for one user (me) only, but server or multi-user applications are not excluded. I may run it on a server hardware. It should run on Linux (Lubuntu / Ubuntu prefered). Free and OpenSource software is prefered. It would be nice if I could perform new communication (like writing a new email, sms, etc.) with one application, but that is not a must have requirement. I could also work with different applications dedicated for different types of communication like IM-application for IM and email-application for email, if all that communication data from the specialized applications will be delivered to one single place where I can access and backup it. I have an android phone and currently I am using Google contacts as the address-book. In the long term this may change, to get back the control over my data. I did some Internet search but did not find a nice solution, yet. If I am looking for unified messaging and unified communication, am I on the right track? The current Thunderbird version has IM functionality integrated. Did not try it, yet. For SMS it may be possible to use an app to send every SMS (incoming and outgoing) as an email, but I am not sure if those SMS-emails can be mapped to an address-book contact. I don't remember exactly, but isn't there a Google android app (I think Google voice) integrating SMS into google services? But in Germany this function has not been released, yet. Maybe a groupware solution would solve the requirements, but I don't have much experience with it. As communication possibilites are groing, I am woundering that there seems to be such a big gap of solutions. I can't believe I am the only one who would like solution, better integrating all the communication channels more easily. If you know a software solution that solves these requirements (partly) I would be glad if you tell me about it. Thanks in advance.

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• Distinction between an extranet and a DMZ

  - by Markus Yrjölä

  I've been reading about intranets, extranets, DMZs and VPNs now, and I'd need some clarifications related to extranets and DMZs. I understand that they are different types of concepts - extranet allows limited access to some intranet resources, while DMZ is a subnet that sits between the internet and intranet and hosts the external-faced services. However, I'd like to know what is their distinction in practice in a usual setup? The Wikipedia article on extranets says that extranets are similar to DMZs because they are used for the same purpose (providing access to some services/resources without exposing the whole intranet). The article also states that an extranet is a part of a VPN, and this TechNet article also states that extranet access is often implemented similarly to remote intranet access, e.g. with a VPN. The TechNet article also says that commonly the extranet is hosted inside the DMZ. This Pearson article says "Although [the DMZ] is technically located within the intranet, [it] can serve as the extranet as well". This is slightly confusing. Consider this scenario: A company has a B2C website hosted in the DMZ. The website can be accessed from anywhere, but requires user authentication. The underlying web app has its database inside the intranet and also interacts with some web services that are hosted inside the intranet (i.e. it accesses intranet resources). The way I see it, the website does effectively offer a restricted access to the intranet. But can it be considered an extranet? If we take the Wikipedia definition of an extranet literally - "An extranet is a computer network that allows controlled access from outside of an organization's intranet" - I think it can. Let's say that the above can't be considered an extranet. What if we change the scenario slightly, and say it's a B2B website, where the access is e.g. limited to connections coming from a specific business partner (by using site-to-site VPN, for example). In this case it surely is an extranet, right? If this is the case, then the difference between extranet services and any other services hosted in the DMZ is simply access restrictions?

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• An alternative to Google Talk, AIM, MSN, et al [closed]

  - by mkaito

  I'm not entirely sure whether this part of stack exchange is the most adequate for my question, but it would seem to me that people sharing this kind of concern would converge either here, or possibly on a more unix-specific sub site. Either way, here goes. Background Feel free to skip to The Question, below. This should, however, help those interested understand where I'm coming from, and where I expect to get, messaging-wise. My online talking place-to-go has been IRC for the last fifteen years. I think it's a great protocol, and clients out there are very good. I still use, and will always continue to use IRC for most of my chat needs. But then, there is private instant messaging. While IRC can solve this with queries and DCC chats, the protocol just isn't meant to work too well on intermittent connections, such as a mobile device, where you can often walk around places with low signal. I used MSN for a while, but didn't like it. The concept was awesome, but I think Microsoft didn't get the implementation quite right. When they started adding all that eye candy, and my buddies started flooding me with custom icons and buzzing my screen to it's knees, I shut my account and told folks that missed me to just email or call me. Much whining happened, I got called many weird things for not using MSN, but folks eventually got over it. Next, Google Talk came along, and seemed to be a lot better than MSN ever was. The protocol was open, so I could use whatever client I felt a fancy for. With the advent of smart phones, I just got myself a gtalk client on the phone, and have had a really decent integrated mostly-universal IM solution. Over the last few months, all Google services have been feeling flaky. IMs will often arrive anywhere between twenty minutes and one hour after being sent, clients will randomly disconnect, client priorities seem to work sometimes, and sometimes just a random device of those connected will get an IM. I think the time has come to look for greener grass. The Question It's rather hard to put what I'm looking for into precise words. I guess I just want something that is kind of like MSN/Gtalk, but that doesn't let me down when I need it. IRC is pretty much perfect, but the protocol just isn't designed to work well on mobile devices. Really, at this point I'm considering sticking to IRC for desktop messaging, and SMS/email on the phone, but I hope that in this day and age there is something better out there.

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• ISAPI filter with LDAP over SSL only works as administrator

  - by Zac

  I have created an ISAPI filter for IIS 6.0 that tries to authenticate against Active directory using LDAP. The filter works fine when authenticating regularly over port 389, but when I try to use SSL, I always get the 0x51 Server Down error at the ldap_connect() call. Even skipping the connect call and using ldap_simple_bind_s() results in the same error. The weird thing is that if I change the app pool identity to the local admin account, then the filter works fine and LDAP over SSL is successful. I created an exe with the same code below and ran it on the server as admin and it works. Using the default NETWORK SERVICE identity for the site's app pool is what seems to be the problem. Any thoughts as to what is happening? I want to use the default identity since I don't want the website to have elevated admin privileges. The server is in a DMZ outside the network and domain where our DCs are that run AD. We have a valid certificate on our DCs for AD as well. Code: // Initialize LDAP connection LDAP * ldap = ldap_sslinit(servers, LDAP_SSL_PORT, 1); ULONG version = LDAP_VERSION3; if (ldap == NULL) { strcpy(error_msg, ldap_err2string(LdapGetLastError())); valid_user = false; } else { // Set LDAP options ldap_set_option(ldap, LDAP_OPT_PROTOCOL_VERSION, (void *) &version); ldap_set_option(ldap, LDAP_OPT_SSL, LDAP_OPT_ON); // Make the connection ldap_response = ldap_connect(ldap, NULL); // <-- Error occurs here! // Bind and continue... } UPDATE: I created a new user without admin privileges and ran the test exe as the new user and I got the same Server Down error. I added the user to the Administrators group and got the same error as well. The only user that seems to work with LDAP over SSL authentication on this particular server is administrator. The web server with the ISAPI filter (and where I've been running the test exe) is running Windows Server 2003. The DCs with AD on them are running 2008 R2. Also worth mentioning, we have a WordPress site on the same server that authenticates against LDAP over SSL using PHP (OpenLDAP) and there's no problem there. I have an ldap.conf file that specifies TLS_REQCERT never and the user running the PHP code is IUSR.

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• I can't send email from my server to gmail addresses

  - by brianegge

  I'm using postfix, and have setup spf, dkim, and domainkeys. I can get my email to go to Yahoo, but not gmail. Here's the headers from an email send to Yahoo. Yahoo reports the email as domain key verified. X-Apparently-To: brianegge at yahoo.com via 68.142.206.167; Sat, 20 Mar 2010 05:29:19 -0700 Return-Path: <domains at theeggeadventure.com> X-YahooFilteredBulk: 67.207.137.114 X-YMailISG: x7_Rl9EWLDuugoqPcORhih0FeQMOaIIpz4qfuu9ttx1xbo3uKI2kz.CLUy2cJ1BTtHAwuJtrsGRsveHIx.Dx95avNGlPPGWy_cSpnEwWLXGxBciO.YgtSQxdURQiWLCLvbHej0QPjQIHFjAFjdeGhJd2Y8NgTW1wcExq45Sb7LMlOGvtGMjSQuc8QazwXUxpZrQbIxgSQUTmzQO1x30xaZ2Us6TQTab7Wpya6OgAX.emKOM3phfS5kfhYj9FLQ.qi32sFNWnAoFdVK596OTP2F63PAJOVM5qPsM2jIAbJylIBmnj94LO7hOVr3KOS6XLtCPRn2Oe X-Originating-IP: [67.207.137.114] Authentication-Results: mta1055.mail.mud.yahoo.com from=theeggeadventure.com; domainkeys=pass (ok); from=theeggeadventure.com; dkim=pass (ok) Received: from 127.0.0.1 (EHLO mail.theeggeadventure.com) (67.207.137.114) by mta1055.mail.mud.yahoo.com with SMTP; Sat, 20 Mar 2010 05:29:19 -0700 Received: by mail.theeggeadventure.com (Postfix, from userid 1003) id BB5B01C16A4; Sat, 20 Mar 2010 12:29:16 +0000 (UTC) DomainKey-Signature: a=rsa-sha1; s=2010; d=theeggeadventure.com; c=simple; q=dns; b=JHbK9VhqyQTfpQFqaXxJrKpEG9h9H0IZ0LdWoBooJEA7hv3SYWmFUtyE247EuwoaG gzApKJ1DuRhwESZ7PswrbzuaUL8poAUO8LmMvZ+OqnDolgNSJUYWu0FcO+fe3H4m9ZD grkj0xMpHw+uFjXV4plKO+sa8olJXJAmP+9cMEo= X-DKIM: Sendmail DKIM Filter v2.8.2 mail.theeggeadventure.com BB5B01C16A4 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=theeggeadventure.com; s=2010; t=1269088156; bh=bUlMldcnzFCmCmNT8qjpRl6fiY1YyjiZiC9jhCXASOw=; h=Subject:To:Message-Id:Date:From; b=EVNolTlh4Gch5/HIrrHaRQvcApl7wkB42gB44NsPcLZD2QrhuOvnhanhnEB4UbV0e A+3dAOjhX7LKzgGrn11jXNTiEjNX1vQDsX3HyG0fNra73aWiGTzr1nHJfnuEJ7Ph0j 5tp0HRL5jjikD1XJcvmsYzTpT22mxuz60HXYRB1s= Subject: cron To: <brianegge at yahoo.com> X-Mailer: mail (GNU Mailutils 1.2) Message-Id: <[email protected]> Date: Sat, 20 Mar 2010 12:29:16 +0000 (UTC) From: This sender is DomainKeys verified [email protected] (domains) View contact details Content-Length: 818 When I send to gmail, I see the following in my server log, but the message doesn't even reach my spam folder. Mar 20 12:59:12 Everest postfix/pickup[27802]: C81C61C16A4: uid=1000 from=<egge> Mar 20 12:59:12 Everest postfix/cleanup[27847]: C81C61C16A4: message-id=<[email protected]> Mar 20 12:59:13 Everest postfix/qmgr[27801]: C81C61C16A4: from=<[email protected]>, size=2784, nrcpt=1 (queue active) Mar 20 12:59:14 Everest postfix/smtp[27849]: C81C61C16A4: to=<brianegge at gmail.com>, relay=gmail-smtp-in.l.google.com[209.85.223.24]:25, delay=2.1, delays=0.39/0.28/0.13/1.3, dsn=2.0.0, status=sent (250 2.0.0 OK 1269089954 32si4566750iwn.51) Mar 20 12:59:14 Everest postfix/qmgr[27801]: C81C61C16A4: removed I've send to email to test services, and the report everything verifies ok. I've also checked all the RBL lists, and I'm not on any of them.

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• Configuring OpenLDAP as a Active Directory Proxy

  - by vadensumbra

  We try to set up an Active Directory server for company-wide authentication. Some of the servers that should authenticate against the AD are placed in a DMZ, so we thought of using a LDAP-server as a proxy, so that only 1 server in the DMZ has to connect to the LAN where the AD-server is placed). With some googling it was no problem to configure the slapd (see slapd.conf below) and it seemed to work when using the ldapsearch tool, so we tried to use it in apache2 htaccess to authenticate the user over the LDAP-proxy. And here comes the problem: We found out the username in the AD is stored in the attribute 'sAMAccountName' so we configured it in .htaccess (see below) but the login didn't work. In the syslog we found out that the filter for the ldapsearch was not (like it should be) '(&(objectClass=*)(sAMAccountName=authtest01))' but '(&(objectClass=*)(?=undefined))' which we found out is slapd's way to show that the attribute do not exists or the value is syntactically wrong for this attribute. We thought of a missing schema and found the microsoft.schema (and the .std / .ext ones of it) and tried to include them in the slapd.conf. Which does not work. We found no working schemata so we just picked out the part about the sAMAccountName and build a microsoft.minimal.schema (see below) that we included. Now we get the more precise log in the syslog: Jun 16 13:32:04 breauthsrv01 slapd[21229]: get_ava: illegal value for attributeType sAMAccountName Jun 16 13:32:04 breauthsrv01 slapd[21229]: conn=0 op=1 SRCH base="ou=oraise,dc=int,dc=oraise,dc=de" scope=2 deref=3 filter="(&(objectClass=\*)(?sAMAccountName=authtest01))" Jun 16 13:32:04 breauthsrv01 slapd[21229]: conn=0 op=1 SRCH attr=sAMAccountName Jun 16 13:32:04 breauthsrv01 slapd[21229]: conn=0 op=1 SEARCH RESULT tag=101 err=0 nentries=0 text= Using our Apache htaccess directly with the AD via LDAP works though. Anyone got a working setup? Thanks for any help in advance: slapd.conf: allow bind_v2 include /etc/ldap/schema/core.schema ... include /etc/ldap/schema/microsoft.minimal.schema ... backend ldap database ldap suffix "ou=xxx,dc=int,dc=xxx,dc=de" uri "ldap://80.156.177.161:389" acl-bind bindmethod=simple binddn="CN=authtest01,ou=GPO-Test,ou=xxx,dc=int,dc=xxx,dc=de" credentials=xxxxx .htaccess: AuthBasicProvider ldap AuthType basic AuthName "AuthTest" AuthLDAPURL "ldap://breauthsrv01.xxx.de:389/OU=xxx,DC=int,DC=xxx,DC=de?sAMAccountName?sub" AuthzLDAPAuthoritative On AuthLDAPGroupAttribute member AuthLDAPBindDN CN=authtest02,OU=GPO-Test,OU=xxx,DC=int,DC=xxx,DC=de AuthLDAPBindPassword test123 Require valid-user microsoft.minimal.schema: attributetype ( 1.2.840.113556.1.4.221 NAME 'sAMAccountName' SYNTAX '1.3.6.1.4.1.1466.115.121.1.15' SINGLE-VALUE )

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• Supervisord appears to be running, but monitored programs aren't launched

  - by Brad Montgomery

  I've got supervisord 3.0a8 installed from the system package on ubuntu 10.04 (64bit). The supervisor service appears to be running, but it's not launching the configured programs. Interestingly enough, this exact configuration is running on another system, and is working as expected. The main config file looks like this: ; /etc/supervisor/supervisord.conf [unix_http_server] chmod=0700 file=/var/run/supervisor.sock [supervisord] logfile=/var/log/supervisor/supervisord.log childlogdir=/var/log/supervisor pidfile=/var/run/supervisord.pid [rpcinterface:supervisor] supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface [supervisorctl] serverurl=unix:///var/run/supervisor.sock [include] files = /etc/supervisor/conf.d/*.conf A sample program config looks like this: ; /etc/supervisor/conf.d/sample.conf [program:sample] directory=/opt/sample command=/opt/sample/run.sh Where, the /opt/sample/run.sh is: #!/bin/bash while true; do T=`date` echo "[$T] Running!" >> /var/log/sample.log sleep 1 done And, here's some additional information regarding the running instance of supervisord: root@myhost:~# supervisorctl version 3.0a8 root@myhost:~# which supervisorctl /usr/bin/supervisorctl root@myhost:~# which supervisord /usr/bin/supervisord root@myhost:~# supervisorctl status # NOTE that there's no output! root@myhost:~# supervisorctl avail root@myhost:~# service supervisor status is running root@myhost:~# ps aux | grep supervisor root 21740 0.1 0.4 40772 10056 ? Ss 11:28 0:00 /usr/bin/python /usr/bin/supervisord root 21749 0.0 0.0 7624 932 pts/2 S+ 11:28 0:00 grep --color=auto supervisor root@myhost:~# cat /var/log/supervisor/supervisord.log 2012-04-26 11:28:22,483 CRIT Supervisor running as root (no user in config file) 2012-04-26 11:28:22,536 INFO RPC interface 'supervisor' initialized 2012-04-26 11:28:22,536 WARN cElementTree not installed, using slower XML parser for XML-RPC 2012-04-26 11:28:22,536 CRIT Server 'unix_http_server' running without any HTTP authentication checking 2012-04-26 11:28:22,539 INFO daemonizing the supervisord process 2012-04-26 11:28:22,539 INFO supervisord started with pid 21740 root@myhost:~# ll /etc/supervisor/conf.d/ total 28 drwxr-xr-x 2 root root 4096 2012-04-26 11:31 ./ drwxr-xr-x 3 root root 4096 2012-04-25 18:38 ../ -rw-r--r-- 1 root root 66 2012-04-26 11:31 sample.conf root@myhost:~# ll /opt/sample/ total 12 drwxr-xr-x 2 root root 4096 2012-04-26 11:32 ./ drwxr-xr-x 4 root root 4096 2012-04-26 11:31 ../ -rwxr-xr-x 1 root root 97 2012-04-26 11:32 run.sh* root@myhost:~# python Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41) [GCC 4.4.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> Any help is greatly appreciated!

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• Windows Server 2003 IPSec Tunnel Connected, But Not Working (Possibly NAT/RRAS Related)

  - by Kevinoid

  Configuration I have setup a "raw" IPSec tunnel between a Windows Server 2003 (SBS) machine and a Netgear FVG318 according to the instructions in Microsoft KB816514. The configuration is as follows (using the same conventions as the article): NetA | SBS2003 | FVG318 | NetB 10.0.0.0/24 | 216.x.x.x | 69.y.y.y | 10.0.254.0/24 Both the Main Mode and Quick Mode Security Associations are successfully completed and appear in the IP Security Monitor. I am also able to ping the SBS2003 server on its private address from any computer on NetB. The Problem Any traffic sent from a computer on NetA to NetB, or from SBS2003 to NetB (excluding ICMP Ping responses), is sent out on the public network interface outside the IPSec tunnel (no encryption or header authentication, as if the tunnel were not there). Pings sent from a computer on NetB to a computer on NetA successfully reach computers on NetA, but the responses are silently discarded by SBS2003 (they do not go out in the clear and do not generate any encrypted traffic). Possible Solutions Incorrect Configuration I could have mistyped something, somewhere, or KB816514 could be incorrect in some way. I have tried very hard to eliminate the first option. Have re-created the configuration several times, tried tweaking and adjusting all the settings I could without success (most prevent the SA from being established). NAT/RRAS I have seen multiple posts elsewhere suggesting that this could be due to interaction between NAT and the IPSec filters. Possibly the NetA private addresses get rewritten to 216.x.x.x before being compared with the Quick Mode IPSec filters and don't get tunneled because of the mismatch. In fact, The Cable Guy article from June 2005 "TCP/IP Packet Processing Paths" suggests that this is the case, (see step 2 and 4 of the Transit Traffic path). If this is the case, is there a way to exclude NetA-NetB traffic from NAT? Any thoughts, ideas, suggestions, and/or comments are appreciated. Update (2011-06-26) After failing to solve the problem, I resorted to paid Microsoft support. They were unable to solve the problem. Since then I have implemented a solution based on Linux that is working quite well. I will attempt to evaluate any proposed answers as best I can, but current configurations and time constraints will make this slow...

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• Nginx Password Protect Directory Downloads Source Code

  - by Pamela

  I'm trying to password protect a WordPress login page on my Nginx server. When I navigate to http://www.example.com/wp-login.php, this brings up the "Authentication Required" prompt (not the WordPress login page) for a username and password. However, when I input the correct credentials, it downloads the PHP source code (wp-login.php) instead of showing the WordPress login page. Permission for my htpasswd file is set to 644. Here are the directives in question within the server block of my website's configuration file: location ^~ /wp-login.php { auth_basic "Restricted Area"; auth_basic_user_file htpasswd; } Alternately, here are the entire contents of my configuration file (including the above four lines): server { listen *:80; server_name domain.com www.domain.com; root /var/www/domain.com/web; index index.html index.htm index.php index.cgi index.pl index.xhtml; error_log /var/log/ispconfig/httpd/domain.com/error.log; access_log /var/log/ispconfig/httpd/domain.com/access.log combine$ location ~ /\. { deny all; access_log off; log_not_found off; } location = /favicon.ico { log_not_found off; access_log off; } location = /robots.txt { allow all; log_not_found off; access_log off; } location /stats/ { index index.html index.php; auth_basic "Members Only"; auth_basic_user_file /var/www/web/stats/.htp$ } location ^~ /awstats-icon { alias /usr/share/awstats/icon; } location ~ \.php$ { try_files /b371b8bbf0b595046a2ef9ac5309a1c0.htm @php; } location @php { try_files $uri =404; include /etc/nginx/fastcgi_params; fastcgi_pass unix:/var/lib/php5-fpm/web11.sock; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_intercept_errors on; } location / { try_files $uri $uri/ /index.php?$args; client_max_body_size 64M; } location ^~ /wp-login.php { auth_basic "Restricted Area"; auth_basic_user_file htpasswd; } } If it makes any difference, I'm using Ubuntu 14.04.1 LTS with Nginx 1.4.6 and ISPConfig 3.0.5.4p3.

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• Multi-Role Domain Controllers for Small Offices (< 50 clients)

  - by kce

  Warning: I'm a Linux/*NIX admin so this is all new to me. I understand that it's not considered a good idea to have only a single domain controller, and that it is also probably a good idea for a domain controller to only do AD/DHCP/DNS (Here). We have two offices, location A with 30 users and location B with 10 users. Our two offices are separated by a WAN that is not particularly robust so I have be instructed that we need to have standalone services in each office. This means that according to "best practices" we will need to build a domain controller and a separate file server in each office. Again, I am not knowledgeable in the ways of Windows but this seems a little unnecessary for an organization of 40 users. People have commented that I could "get away with" running file services on the domain controller as long as the "load is light". That just seems to generate more questions than it answers. What constitutes light load? What are the potential consequences of mixing these roles? Ideally I would prefer to only have one physical machine at each location. The one in location A (the location with IT staff) can act as the primary domain controller and the one in the smaller office can act as the backup domain controller. If either domain controller fails we can still use the other one for authentication (albeit with some latency) and if the WAN connection fails each office still has access to their respective "local" domain controller. If the file services are ALSO run on each server (and synchronized with something like DFS), a similar arrangement in terms of redundancy can be had without having to purchase, build and install two additional separate servers. It's not that I'm adverse to that (well, any more adverse than I am to whole thing to begin with) but to my simple mind it just seems, well a bit overkill. I can definitely see the benefits of functional separation when we're talking larger organizations, but I need to consider the additional overhead too. None of this excludes having a DRP setup for the domain controller/s. I assume you can lose two domain controllers just as easily as one.

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• Subversion vision and roadmap

  - by gbjbaanb

  Recently C Michael Pilato of the core subversion team posted a mail to the subversion dev mailing list suggesting a vision and roadmap for the future of Subversion. Naturally, he wanted as much feedback and response as possible which is why I'm posting this here - to elicit some suggestions and contributions from you, the administrators of Subversion. Any comments are welcome, and I shall feedback a synopsis with a link to this question to the dev mailing list. Similarly, I've created a post on StackOverflow to get feedback from the programmer/user side of things too. So, without further ado: Vision The first thing on his "vision statement" is: Subversion has no future as a DVCS tool. Let's just get that out there. At least two very successful such tools exist already, and to squeeze another horse into that race would be a poor investment of energy and talent. There's no need to suggest distributed features for subversion. If you want a DVCS, there should be no ill-feeling if you migrate to Git, Mercurial or Bazaar. As he says, its pointless trying to make SVN like them when they already exist, especially when there are different usage patterns that SVN should be targetting. The vision for Subversion is: Subversion exists to be universally recognized and adopted as an open-source, centralized version control system characterized by its reliability as a safe haven for valuable data; the simplicity of its model and usage; and its ability to support the needs of a wide variety of users and projects, from individuals to large-scale enterprise operations. Roadmap Several ideas were suggested as being "very nice to have" and are offered as the starting point of a future roadmap. These are: Obliterate Shelve/Checkpoint Repository-dictated Configuration Rename Tracking Improved Merging Improved Tree Conflict Handling Enterprise Authentication Mechanisms Forward History Searching Log Message Templates Repository-dictated Configuration If anyone has suggestions to add, or comments on these, the subversion community would welcome all of them. Community And lastly, there was a call for more people to become involved with Subversion development. As with most OSS projects it can be daunting to join, but there is now a push for more to be done to help. If you feel like you can contribute, please do so.

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• Can't get Monit to work

  - by Andrea

  I am trying to configure Monit on my local machine to get a taste at how it works, but I have some issues. What I am trying to do is to get any evidence that Monit is up and running correctly and is actually monitoring something. So my /etc/monit/monitrc looks like set daemon 60 set logfile /var/log/monit.log set idfile /var/lib/monit/id set statefile /var/lib/monit/state set eventqueue basedir /var/lib/monit/events slots 100 set httpd port 2812 and allow username:password check process apache2 with pidfile /usr/local/apache/logs/apache2.pid start program = "/etc/init.d/apache2 start" stop program = "/etc/init.d/apache2 stop" if failed port 6543 protocol http then exec "/usr/bin/touch /tmp/monit" If I understand correctly, since apache does not listen on port 6543 (it is just a random number) I should get an error, and as a consequence the file /tmp/monit should be created. So I start monit by sudo service monit start sudo monit monitor apache2 Unfortunately no such file is created. Instead the web console shows an error for apache - execution failed. The log says 'apache2' failed to start. What am I doing wrong? EDIT As suggested in the comments, I ran monit in verbose mode, by monit -vv monitor apache2 (the exact command suggested in the comments failed). The output is Runtime constants: Control file = /etc/monit/monitrc Log file = /var/log/monit.log Pid file = /var/run/monit.pid Debug = True Log = True Use syslog = False Is Daemon = True Use process engine = True Poll time = 60 seconds with start delay 0 seconds Expect buffer = 256 bytes Event queue = base directory /var/lib/monit/events with 100 slots Mail from = (not defined) Mail subject = (not defined) Mail message = (not defined) Start monit httpd = True httpd bind address = Any/All httpd portnumber = 2812 httpd signature = True Use ssl encryption = False httpd auth. style = Basic Authentication The service list contains the following entries: Process Name = apache2 Pid file = /usr/local/apache/logs/apache2.pid Monitoring mode = active Start program = '/etc/init.d/apache2 start' timeout 30 second(s) Stop program = '/etc/init.d/apache2 stop' timeout 30 second(s) Existence = if does not exist 1 times within 1 cycle(s) then restart else if succeeded 1 times within 1 cycle(s) then alert Pid = if changed 1 times within 1 cycle(s) then alert Ppid = if changed 1 times within 1 cycle(s) then alert Port = if failed localhost:6543 [HTTP via TCP] with timeout 5 seconds 1 times within 1 cycle(s) then exec '/usr/bin/touch /tmp/prova-monit' timeout 0 cycle(s) else if succeeded 1 times within 1 cycle(s) then alert System Name = system_andrea-Vostro-420-Series Monitoring mode = active

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• IIS6 Virtual Directory 500 Error on Remote Share

  - by David

  We have our servers at the server farm in a domain. Let's call it LIVE. Our developer computers live in a completely separate corporate domain, miles and miles away. Let's call it CORP. We have a large central storage unit (unix) that houses images and other media needed by many webservers in the server farm. The IIS application pools run as (let's say) LIVE\MediaUser and use those credentials to connect to a central storage share as a virtual directory, retrieve the images, and serve them as if they were local on each server. The problem is in development. On my development machine. I log in as CORP\MyName. My IIS 6 application pool runs as Network Service. I can't run it as a user from the LIVE domain because my machine isn't (and can not be) joined to that domain. I try to create a virtual directory, point it to the same network directory, click Connect As, uncheck the "Always use the authenticated user's credentials when validating access to the network directory" checkbox so that I can enter the login info, enter the credentails for LIVE\MediaUser, click OK, verify the password, etc. This doesn't work. I get "HTTP Error 500 - Internal server error" from IIS. The IIS log file reports sc-status = 500, sc-substatus = 16, and sc-win32-status = 1326. The documentation says this means "UNC authorization credentials are incorrect" and the Win32 status means "Logon failure: unknown user name or bad password." This would be all and good if it were anywhere close to accurate. I double- and trouble-checked it. Tried multiple known good logins. The IIS manager allows me to view the file tree in its window, it's only the browser that kicks me out. I even tried going to the virtual directory's Directory Security tab, and under Authentication and Access Control, I tried using the same LIVE domain username for the anonymous access credential. No luck. I'm not trying to run any ASP, ASP.NET, or other dynamic anything out of the virtual directory. I just want IIS to be able to load static images, css, and js files. If anyone has some bright ideas I would be most appreciative!

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• ZFS/Btrfs/LVM2-like storage with advanced features on Linux?

  - by Easter Sunshine

  I have 3 identical internal 7200 RPM SATA hard disk drives on a Linux machine. I'm looking for a storage set-up that will give me all of this: Different data sets (filesystems or subtrees) can have different RAID levels so I can choose performance, space overhead, and risk trade-offs differently for different data sets while having a few number of physical disks (very important data can be 3xRAID1, important data can be 3xRAID5, unimportant reproducible data can be 3xRAID0). If each data set has an explicit size or size limit, then the ability to grow and shrink the size limit (offline if need be) Avoid out-of-kernel modules R/W or read-only COW snapshots. If it's a block-level snapshots, the filesystem should be synced and quiesced during a snapshot. Ability to add physical disks and then grow/redistribute RAID1, RAID5, and RAID0 volumes to take advantage of the new spindle and make sure no spindle is hotter than the rest (e.g., in NetApp, growing a RAID-DP raid group by a few disks will not balance the I/O across them without an explicit redistribution) Not required but nice-to-haves: Transparent compression, per-file or subtree. Even better if, like NetApps, analyzes the data first for compressibility and only compresses compressible data Deduplication that doesn't have huge performance penalties or require obscene amounts of memory (NetApp does scheduled deduplication on weekends, which is good) Resistance to silent data corruption like ZFS (this is not required because I have never seen ZFS report any data corruption on these specific disks) Storage tiering, either automatic (based on caching rules) or user-defined rules (yes, I have all-identical disks now but this will let me add a read/write SSD cache in the future). If it's user-defined rules, these rules should have the ability to promote to SSD on a file level and not a block level. Space-efficient packing of small files I tried ZFS on Linux but the limitations were: Upgrading is additional work because the package is in an external repository and is tied to specific kernel versions; it is not integrated with the package manager Write IOPS does not scale with number of devices in a raidz vdev. Cannot add disks to raidz vdevs Cannot have select data on RAID0 to reduce overhead and improve performance without additional physical disks or giving ZFS a single partition of the disks ext4 on LVM2 looks like an option except I can't tell whether I can shrink, extend, and redistribute onto new spindles RAID-type logical volumes (of course, I can experiment with LVM on a bunch of files). As far as I can tell, it doesn't have any of the nice-to-haves so I was wondering if there is something better out there. I did look at LVM dangers and caveats but then again, no system is perfect.

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• How to reference a Domain Controller out of the Local Network?

  - by Adrian

  We have multiple servers scattered over different hosting providers. For learning, experimenting and, ultimately, production purposes, I set one of them as a Domain Controller. That went well, most of our services are now authenticating via AD, which helps us a lot. What I want to do now is to simplify the authentication for the multiple servers, by making each of them look at the Domain Controller. This way, our Devs can log into (Remote Desktop) the multiple servers with the same credentials from AD. I know I have to configure each server to look at the Domain Controller. But when I try to add the Domain Controller to the Computer, it cannot find it, although the Domain Controller address is a valid, reachable internet sub-domain (as in "ad.ourcompany.com"). This is the detailed error message: Note: This information is intended for a network administrator. If you are not your network's administrator, notify the administrator that you received this information, which has been recorded in the file C:\Windows\debug\dcdiag.txt. The following error occurred when DNS was queried for the service location (SRV) resource record used to locate an Active Directory Domain Controller for domain ad.ourcompany.com: The error was: "DNS name does not exist." (error code 0x0000232B RCODE_NAME_ERROR) The query was for the SRV record for _ldap._tcp.dc._msdcs.ad.ourcompany.com Common causes of this error include the following: - The DNS SRV records required to locate a AD DC for the domain are not registered in DNS. These records are registered with a DNS server automatically when a AD DC is added to a domain. They are updated by the AD DC at set intervals. This computer is configured to use DNS servers with the following IP addresses: 109.188.207.9 109.188.207.10 - One or more of the following zones do not include delegation to its child zone: ad.ourcompany.com ourcompany.com com . (the root zone) For information about correcting this problem, click Help. What am I missing? I'm an experienced Dev, but a newbie Sysdamin experimenting with new stuff. Disclaimer All IP addresses and domains/subdomains were changed to preserve security. If by any chance you still can see private information, please let me know so that I can change it.

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• IPSEC site-to-site Openswan to Cisco ASA

  - by Jim

  I recieved a list of commands that were run on the right side of the VPN tunnel which is where the Cisco ASA resides. On my side, I have a linux based firewall running debian with openswan installed. I am having an issue with getting to Phase 2 of the VPN negotiation. Here is the Cisco Information I was sent: {my_public_ip} = left side of connection tunnel-group {my_public_ip} type ipsec-l2l tunnel-group {my_public_ip} ipsec-attributes pre-shared-key fakefake crypto map vpn1 1 match add customer-ipsec crypto map vpn1 1 set peer {my_public_ip} crypto map vpn1 1 set transform-set aes-256-sha crypto map vpn1 interface outside static (outside,inside) 10.2.1.200 {my_public_ip} netmask 255.255.255.255 crypto ipsec transform-set aes-256-sha esp-aes-256 esp-sha-hmac crypto ipsec security-association lifetime seconds 28800 crypto ipsec security-association lifetime kilobytes 4608000 crypto map vpn1 1 match address customer-ipsec crypto map vpn1 1 set peer {my_public_ip} crypto map vpn1 1 set transform-set aes-256-sha crypto map vpn1 interface outside crypto isakmp enable outside crypto isakmp policy 1 authentication pre-share encryption aes-256 hash sha group 2 lifetime 86400 Myside ipsec.conf config setup klipsdebug=none plutodebug=none protostack=netkey #nat_traversal=yes conn cisco #name of VPN connection type=tunnel authby=secret #left side (myside) left={myPublicIP} leftsubnet=172.16.250.0/24 #net subnet on left sdie to assign to right side leftnexthop=%defaultroute #right security gateway (ASA side) right={CiscoASA_publicIP} #cisco ASA rightsubnet=10.2.1.0/24 rightnexthop=%defaultroute #crypo stuff keyexchange=ike ikelifetime=86400s auth=esp pfs=no compress=no auto=start ipsec.secrets file {CiscoASA_publicIP} {myPublicIP}: PSK "fakefake" When I start ipsec from the left side/my side I don't recieve any errors, however when I run the ipsec auto --status command: 000 "cisco": 172.16.250.0/24==={left_public_ip}<{left_public_ip}>[+S=C]---{left_public_ip_gateway}...{left_public_ip_gateway}--{right_public_ip}<{right_public_ip}>[+S=C]===10.2.1.0/24; prospective erouted; eroute owner: #0 000 "cisco": myip=unset; hisip=unset; 000 "cisco": ike_life: 86400s; ipsec_life: 28800s; rekey_margin: 540s; rekey_fuzz: 100%; keyingtries: 0 000 "cisco": policy: PSK+ENCRYPT+TUNNEL+UP+IKEv2ALLOW+SAREFTRACK+lKOD+rKOD; prio: 24,24; interface: eth0; 000 "cisco": newest ISAKMP SA: #0; newest IPsec SA: #0; 000 000 #2: "cisco":500 STATE_MAIN_I1 (sent MI1, expecting MR1); EVENT_RETRANSMIT in 10s; nodpd; idle; import:admin initiate 000 #2: pending Phase 2 for "cisco" replacing #0 Now I'm new to setting up an site-to-site IPSEC tunnel so the status informatino I am unsure what it means. All I know is it sits at this "pending Phase 2" and I can't ping the other side, Another question I have is, if I do a route -n, should I see anything relating to this connection? Also, I read a few artilcle where configs contained the interface="ipsec0=eth0", is this an interface that I have to create on the linux debian firewall on my side? Appreciate your time to look at this.

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• Windows 2008 R2 CA and auto-enrollment: how to get rid of >100,000 issued certificates?

  - by HopelessN00b

  The basic problem I'm having is that I have 100,000 useless machine certificates cluttering up my CA, and I'd like to delete them, without deleting all certs, or time jumping the server ahead, and invalidating some of the useful certs on there. This came about as a result of accepting a couple defaults with our Enterprise Root CA (2008 R2) and using a GPO to auto-enroll client machines for certificates to allow 802.1x authentication to our corporate wireless network. Turns out that the default Computer (Machine) Certificate Template will happily allow machines to re-enroll instead of directing them to use the certificate they already have. This is creating a number of problems for the guy (me) who was hoping to use the Certificate Authority as more than a log of every time a workstation's been rebooted. (The scroll bar on the side is lying, if you drag it to the bottom, the screen pauses and loads the next few dozen certs.) Does anyone know how to DELETE 100,000 or so time-valid, existing certificates from a Windows Server 2008R2 CA? When I go to delete a certificate now, now, I get an error that it cannot be delete because it's still valid. So, ideally, some way to temporarily bypass that error, as Mark Henderson's provided a way to delete the certificates with a script once that hurdle is cleared. (Revoking them is not an option, as that just moves them to Revoked Certificates, which we need to be able to view, and they can't be deleted from the revoked "folder" either.) Update: I tried the site @MarkHenderson linked, which is promising, and offers much better certificate manageability, buts still doesn't quite get there. The rub in my case seems to be that the certificates are still "time-valid," (not yet expired) so the CA doesn't want to let them be deleted from existence, and this applies to revoked certs as well, so revoking them all and then deleting them won't work either. I've also found this technet blog with my Google-Fu, but unfortunately, they seemed to only have to delete a very large number of certificate requests, not actual certificates. Finally, for now, time jumping the CA forward so the certificates I want to get rid of expire, and therefore can be deleted with the tools at the site Mark linked is not a great option, as would expire a number of valid certificates we use that have to be manually issued. So it's a better option than rebuilding the CA, but not a great one.

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• Windows 7 playback of dvr-Microsoft files stutters

  - by Jim Lynn

  I've just had to install Windows 7 on my Media Center machine because my Vista installation had a faulty drive. I've got the latest drivers that I can find - Intel 945GM integrated Graphics, Realtek audio drivers. Things are working OK with one exception. Playback of old recordings, from dvr-Microsoft format files, is choppy. The picture freezes for a fraction of a second, then quickly catches up. The sound is uninterrupted and doesn't pause. These freezes happen once every 5 seconds or so. It's very regular. Playback of Live TV from the digital tuner is perfectly smooth. DVD playback is perfectly smooth. As an experiment, I used the MPEG editing package VideoReDo to create a small test file in three different formats. This program takes the raw MPEG streams and repackages them into the desired container. I took the same clip and created three files in three formats: dvr-Microsoft (Microsoft's old recorded TV format); mpg (standard MPEG); and ts (raw MPEG transport stream of the kind often produced by PVRs). When these three files are played back under Windows 7, the mpg and ts files play smoothly, but the dvr-Microsoft file stutters. The last piece of data I have is that two other Windows 7 machines can play back dvr-Microsoft files smoothly with no stuttering. One is a netbook, with less grunt than the media centre. So there must be something specific about my Media Center machine that's causing the problem. Does anyone have any idea where I can look now? I don't know much about AV software, codecs, filter graphs etc. but I suspect that's where the problem lies. Rendering the video isn't the problem, but extracting the streams is. How would I go about diagnosing the problem? Edited to add: I just used the GraphStudio tool to look at the filter graph on the offending PC. The filter graph it uses by default for dvr-Microsoft looks identical to the other machines, and, interestingly, when I play the files using GraphStudio they run smoothly. Under Windows Media Player and Windows Media Center they stutter. I'd like to see the filter graph for Windows Media Player but GraphStudio won't show it. It looks like Windows Media Player and WMC are using a different decoding path to GraphStudio. Edited again to add: Today I purchased a new HDTV. The same Media Center driving the TV at 1080p is now playing back the old Recorded TV files smoothly, without stuttering. So whatever the cause of the original problem, using a different resolution seems to have removed the problem. It might also explain why nobody else has had this problem. I doubt many people use Media Centre with a 14in portable TV.

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