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• Listing group members using ldapsearch

  - by colemanm

  Our corporate LDAP directory is housed on a Snow Leopard Server Open Directory setup. I'm trying to use the ldapsearch tool to export an .ldif file to import into another external LDAP server to authenticate with externally; basically trying to be able to use the same credentials internally and externally. I've got ldapsearch working and giving me the contents and attributes of everything in the "Users" OU, and even filtering down to only the attributes I need: ldapsearch -xLLL -H ldap://server.domain.net / -b "cn=users,dc=server,dc=domain,dc=net" objectClass / uid uidNumber cn userPassword > directorycontents.ldif That gives me a list of users and properties that I can import to my remote OpenLDAP server. dn: uid=username1,cn=users,dc=server,dc=domain,dc=net objectClass: inetOrgPerson objectClass: posixAccount objectClass: organizationalPerson uidNumber: 1000 uid: username1 userPassword:: (hashedpassword) cn: username1 However, when I try the same query on an OD "group" instead of a "container," the results are something like this: dn: cn=groupname,cn=groups,dc=server,dc=domain,dc=net objectClass: posixGroup objectClass: apple-group objectClass: extensibleObject objectClass: top gidNumber: 1032 cn: groupname memberUid: username1 memberUid: username2 memberUid: username3 What I really want is a list of users from the top example filtered based on their group memberships, but it looks like membership is set from the Group side, rather than the user account side. There must be a way to filter this down and only export what I need, right?

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• Citrix Metaframe/RD - screen refresh weirdness

  - by southof40

  I access a clients W2003 machine (XEN Virtualization) using RD over Citrix Metaframe. Everything used to be fine. Some weeks ago things turned bad ! All is well initially but after, say, 5 minutes the screen will stop refreshing. Rather weirdly you can then still proceed in a way as you can make the screen refresh by getting the RD window to go through a restore/maximise cycle (this is only possible using the ALT-BREAK shortcut as everything else is locked up). This then allows you to proceed by typing something and going ALT-BREAK to see the results. Using menus is just not possible at all. There's some indications that clearing the java cache between sessions helps. Also that the lockup happens more quickly if you make the 'lots of stuff happen' on the screen - for instance if you do a directory listing of a big directory then often that will cause the lockup to occur. Similary opening a dense Excel workbook and then scrolling it will cause the lockup to occur. Any Metaframe veterans out there who recognise these symptoms ? I'd be very grateful as it's driving me nuts.

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• (Mac Intel) HP PS driver prints in B&W from Adobe Reader after installing Cannon PS driver

  - by JohnB

  I have a unique problem that leaves me at a loss as to where to start troubleshooting. We have three Macs we use for graphics, two of which are PowerPC and one which is Intel. They are set up to print to an HP 5500dn, but occasionally this printer gets tied up with a massive print job, so I installed the PS driver (iR-PSv1.81MacOSX) for the Cannon C3200 Printer/copier on each of the machines. Both of the PowerPC Macs installed without issue, but the Intel Mac exhibits strange behavior: I've confirmed that while the Cannon driver is installed (whether or not the Cannon is set up for printing in print settings), the HP 5500dn will print in color from Safari, but only prints in black and white from Adobe Reader. The Cannon printer itself has not exhibited any strange behavior As soon as the Cannon driver is uninstalled, the HP 5500dn prints in color from Adobe Reader again. We run a network of Windows PCs, and the 'Mac room' mostly takes care of itself, so we don't have any experienced Mac administrators onsite. The Cannon is capable of Appletalk, but the PS driver seemed easier to work with (and Appletalk is currently disable on the Cannon. I'm not against using the Appletalk compatible drivers, but I would rather use the PS driver if at all possible - I don't want to open up the proverbial can of worms. If someone has any clues or suggestions that would help troubleshoot this problem, I would be grateful. I've already done some googling, but due to the obscure nature of this problem, I haven't been very successful. I don't like to create multiple threads on multiple sites, but I'm posting here due to Chopper3's suggestion on my post on ServerFault (http://serverfault.com/questions/135349/mac-intel-hp-ps-driver-prints-in-bw-from-adobe-reader-after-installing-cannon)

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• DNS NAmeserver Aname and cname records

  - by David

  Hi - I am inexperienced in the configuration of DNS and have an issue with dominan hosting set up. I have two domains 'www.mydomain1.com' and 'www.mydomain2.com', with mydomain2 pointed at the same place as mydomain1. The domains were passed to me recently by the person who previoulsy controlled them. I have an account with fasthosts in the uk. When I accepted the domains I could not access the DNS settings and enquired with fasthosts as to why. The replied saying 'The delegate hosting option for both domains were enabled and this is the reason why you were unable to find the option to edit the advanced DNS records. I have now disabled the delegate hosting option so you can now edit the advanced DNS records for both domains in your account.' When i log into the fasthost control panel now i can access the DNS controls but both domains have no A Record of Cname record set up. I am concerned that fasthosts have blatted the previous Nameserver entries and set me up on theirs but not added any record. 'www.mydomain1.com' currently still works but 'www.mydomain2.com' does not find the site anymore. i am worried i will lose mydomain1 to as teh dns changes filter through the system. my webhosting is at 'xxx.xxx.xxx.xxx/mydomain1.com/' and this is where I want both domains to point. Any advice would be much appreciated. one thing which is confusing me is that because I am on a shared server I have to put 'xxx.xxx.xxx.xxx/mydomain1.com/' to get to my site rather than just 'xxx.xxx.xxx.xxx'. The form on fasthosts for the aname record only allows an IP to be entered - does it add the mydomain1.com/ onto the end itself? Thanks for any help given - I'm quite worried about this David

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• eXist-db: can't start webstart client on a closed port, reverse proxied via apache

  - by rvdb

  I am configuring an Apache HTTP server so it reverse proxies requests starting with /app/ to an eXist-db instance running in a Tomcat server, on port 8082. This port has been closed in the firewall and is inaccessible to the outer world. Following the eXist documentation, I have following rules in place in my httpd.conf file: ProxyPass /apps/ http://localhost:8082/ ProxyPassReverse /apps/ http://localhost:8082/ ProxyPassReverseCookiePath /apps/ / All goes well for requests to e.g. 'http://mydomain/apps/exist/index.xml'. Yet, the webstart client (accessible at 'http://localhost:8082/exist/webstart/exist.jnlp' on the web server) doesn't work behind the proxy. While 'http://mydomain/apps/exist/webstart/exist.jnlp' does generate a valid exist.jnlp file, that file can't be executed. The reason seems quite obvious: apparently, the eXist-db instance generating the exist.jnlp file only sees the proxied request as: 'http://localhost:8082/exist/webstart/exist.jnlp'. Yet, since the exist.jnlp file is executed on the client, that reference is meaningless (unless the client computer happens to have an eXist-db instance running on that port). Executing the exist.jnlp file hence fails with a 'connection refused' error. Yet, there's no problem at all connecting a local eXist-db Java client to the proxied eXist instance with the URL xmldb:exist://mydomain/apps/exist/xmlrpc. The problem lies in generating the webstart exist.jnlp file, which seems to need access to a publicly accessible URL. However, opening port 8082 and replacing the Proxy references to 'http://localhost:8082' with 'http://mydomain:8082' IMO rather destroys the point of reverse proxying. Do others have had success reverse proxying eXist-db on a closed port behind Apache? Are there perhaps some Proxy configuration settings I have overlooked (I'm no expert at all) that can make eXist see the original request instead of the proxied one? Kind regards, Ron

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• Windows XP restarting repeatedly after a fresh restore

  - by DWilliams

  I don't normally deal with Windows but someone wanted me to fix their computer with Windows XP on it. It was just restarting every time it tried to boot. It would not go into safe mode, the result was the same regardless of the selected mode. The computer is like 4 years old and has been running the same installation for that entire time, so I figured the easiest solution was just to back up their files and re-install. I loaded the computer up with a live CD and copied their files off to a USB drive, then proceeded to run HP's "factory restore" feature (which I'm not particularly fond of, I'd rather have a disk to install from than reload all the crapware HP gets paid to install for you). It restored, and I put all their files back, installed their programs, and started the full windows update process. Everything seemed great so I left and told them what to do once it finished. A few hours pass, and my phone rings. Apparently it started doing the exact same thing as before once the updates finished. I don't have the computer sitting in front of me now so I can't really provide any more information than that. What could be causing this and, more importantly, how do I fix it? The fact that the same problem resurfaced after the restore makes me think it's either a hardware problem or an update breaking the computer.

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• Make Google Chrome's address bar prefer page titles to domain names when offering completions?

  - by Ryan Thompson

  I've recently switched from Firefox to Chrome, and the thing I miss most from Firefox is the "Awesome Bar" that suggests completions for what I type primarily based on page titles, and then secondarily based on domain names. Chrome offers both matching URLs and titles, just like like Firefox, but Chrome seems to always prefer a matching domain name over a matching page title or a match to another part of the URL (besides the domain), no matter how many times I pass over the former for the latter. In fact, Chrome also prefers to suggest a search rather than matching anything other than a domain name. So is there any hidden preference I can change to tell Chrome that I care more about page titles than domain names? Example: I want to go to Google Reader, so I press Control+L and begin typing "reader". The URL for google reader is http://www.google.com/reader/view/#overview-page, so the domain name is www.google.com, which does not contain the word "reader". So the first option that Chrome suggests is either another site that has "reader" as part of the domain, or a search for "reader" with the default search engine. No matter how many times I scroll down and select Google Reader, Chrome never "learns" that that's what I want.

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• Enable CPU fan always on

  - by Gundars Meness

  I am using 3 years old overheating laptop and I want my CPU fan to be spinning 24/7 regardless of the consequences. How to make it spin? The problem is that CPU & GPU heats up to 68°C (154 F) right after boot and never goes down, because CPU fan is not spinning full throttle. It starts spinning faster when temperature goes over 70°C and stops when it reaches seventy again. When doing heavy work on databases, it gets from 70 to 90 in no-time and automatically powers off. Bios does not contain any "fan spin 100%" options, just "spin slowly all the time" and "auto" which is more useless than the first one since my fan doesn't have pwm wire. Currently I'm solving this with cooling stand (3x5V), but it isn't much of a help. I would rather use the CPU fan since it is the only fan directly responsible for cooling down CPU/GPU. But how to make it spin 100% all the time? Should I attach it's red power wire to motherboard to get constant 5V (is there such option?), or is there an option to control it via software? Laptop: Samsung R528 2.3 GHz Intel i3 with Nvidia GeForce 310M Bios: Phoenix 03KT.M003.20100622.KSJ (and that is latest update) OS: Ubuntu 12.04.2 LTS with 3.2.0.51 kernel CPU fan: Image/Description Has 5V 0,4A and only 3 pins, no pwm. P.S. Yes, I did clean everything with alcohol, freed the air vents, changed thermal paste etc; that reduced temperature by 4 degrees.

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• Remote Desktop *from* Windows 2008 R2 Server

  - by freefaller

  Summary: how do I create an RDC connection from a Windows 2008 server to another server? Our client will only allow us to connect to their server via a static IP address (which is fair enough), but unfortunately as we're a very small company we don't have one in the office. As a work around, we had the connection working through our old Windows 2003 server (dynamic-cloud from 1and1). .. however we have just rebuilt the server to run under Windows 2008 R2 (don't ask, but it was necessary), and now I simply cannot get the connection working. I have added an "Outbound Rule" to Windows Firewall with Advanced Security (TCP, All local ports, 3389 remote port - I have also tried the other way around). I have added a packet filter IP security rule with the same details. The 1and1 firewall rules (through their online control panel) allows for 3389 TCP and UDP. But it is simply not connecting (yes, the server is definitely on and able to accept connections) with the general error of... Remote Desktop can’t connect to the remote computer for one of these reasons: 1) Remote access to the server is not enabled 2) The remote computer is turned off 3) The remote computer is not available on the network Is there anything obvious I've missed - or something I can use to find out where the request is being blocked? The new server is using the exact same IP address as before, so I don't believe that would be an issue. Unless it's trying to use an IPv6 address rather than the old IPv4 address that it was before? I apologise that I am not a network person by trade, but I know more than anybody else in my office!!

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• Install IIS on Server 2003 unattended via PowerShell as a service user (no terminal session)

  - by maik

  I've been racking my brain with this for a bit and figured I would ask here to see if anyone could enlighten me. As the title says, I'm trying to install the IIS role on Server 2003 using an unattended install method launched via a service. We're using RightScale and most of what we want to accomplish is pretty straightforward. I created an unattend file for use with sysocmgr.exe: [Components] iis_common = ON iis_www = ON iis_www_vdir_scripts = ON iis_inetmgr = ON fp_extensions = ON iis_ftp = ON And I invoke it like so: sysocmgr.exe /i:%windir%\inf\sysoc.inf /u:C:\path\to\iis-unattend.txt /r /x /q If I run that from a command prompt while logged in as Administrator it works just fine, but if it runs via RightScript (the RightScale user on the server, which is a local admin) it fails somewhere in the middle and the logs I get are rather unhelpful. The thing is I can do this same thing with the SNMP Client (which is a Windows component, not a server role) and it works with no problems while run via the script service user. My best guess is that sysocmgr.exe is expecting a GUI element to be there during the role installation and since the service user has no terminal session it coughs and dies. That's just a wild stab in the dark.

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• exporting clip in Final Cut Pro X or related video editing software on Mac

  - by user46976

  I'm using Final Cut Pro X to edit a 1 hour long video. I made individual clips from it in Final Cut Pro X and I want to save just these clips, some of which are only 5 mins long. How can I do this? I tried using the app ClipExporter, but it won't even read my .fcpxml file, it just says that it's not a valid file and gives no helpful information at all. Another method I tried was to assign roles to each clip. I made one clip, 5 mins long, and then used Share - Export in Final Cut Pro X and chose the option to export roles as separate files. However, the export still estimates that it will take over an hour to export and so it looks like it's trying to export the whole movie, rather than the simple 5 min clip which should be exportable as a .MOV or related formats in a few minutes. How can I do this in final cut pro x? I'm also happy to switch to related video editing software as long as they are not extremely expensive. This seems like a very trivial and obvious feature: take a segment from a long movie and export just the selected region of it... I don't understand why it's so complicated to do in Final Cut Pro X. Thanks.

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• Silent install FirePro v4900 Driver on Windows Embedded 7 Standard

  - by Birgit_B

  I'm trying to install the Drivers for a FirePro v4900 on a Windows Embedded 7 Standard 64bit OS. I want the system to be as small as possible, so i would rather not install the whole catalyst control center, but only the necessary drivers. Because the installation should be accomplished absolutely unattended, the installation process of the FirePro-Driver should also be done without any user interaction. I see two possible solutions for the Problem: Install only the Drivers: Is it possible to solely install the necessary drivers? How would i achieve that? This solution would be the preferred one, because of the smaller footprint. Silent custom install the provided "FirePro_8.911.3.3_VistaWin7_X32X64_135673.exe" (found at ATI FirePro™ Driver). Is there a way, to do that? Thank you in advance for your support! Update: I managed to accomplish a silent installation. I extracted the contents of the above mention installer-file and ran \$_OUTDIR\Bin64\Setup.exe -Install. (There are some other Parameters, just run Setup.exe /?). But i couldn't achieve to just install the drivers without the Cataclyst Control Center, and it seams the Control Center has some unfulfilled dependencies and so it crashes...

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• What is the latest on Microsoft Expressoin Studio licensing?

  - by DanM

  In the past, there's been an issue with Microsoft not allowing you to deactivate an Expression Studio key. Basically, you get two keys per license. If you assign both keys (say one to a desktop and one to a laptop), then you upgrade to a new machine (say you replace your laptop or upgrade some of the hardware), you have to buy a new copy of Expression Studio ($600 for Ultimate). This seems ludicrous to me, and I'm wondering if anyone knows if this policy is still in place. I can't seem to find a EULA online anywhere, so I don't know where to find this information. I know my laptop is due for replacement soon, and I want to know if I'm going to have to sink $600 into a software product I already purchased. For background, please refer to this thread on the Microsoft Expression forums: http://social.expression.microsoft.com/Forums/en-US/general/thread/da5587bc-b098-4c6a-9a56-af3608d940d0 Note that this thread is locked. Microsoft doesn't seem to want people to discuss this. This is one reason I'm posting here rather than on that site.

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• SBS 2011 Essentials and too many new Mac users

  - by Harry Muscle

  We currently have about 15 users on a Windows SBS 2011 Essentials Server. I've just been informed that we plan to bring aboard about 15 more users that will be using Macs. We'll be using a Mac Server to manage the 15 new Macs, however, I'm looking for advice on how to best set this all up. Ideally I would just add the 15 new Mac users to Active Directory and setup the Mac Server to authenticate against AD, unfortunately the SBS 2011 Essentials Server has a limit of 25 users, so adding these new users to AD won't work unless we upgrade the Windows server (which I'd rather avoid since it's a lot of work and a lot of money). That leaves the option of creating user accounts for these 15 Mac users on the Mac Server only. The problem that this creates though is how do I share files been Mac users and Windows users since they are now using different systems for network authentication. Any advice (short of upgrade to SBS Standard) is highly appreciated. Thanks, Harry P.S. We don't run Exchange or anything else on our server ... it's mainly used for file sharing and enforcing security via group policies.

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• Google respond differently to two identical nginx setups and 200 codes; any ideas?

  - by Yuji Tomita

  I'm rather confused... I have a linode.com VPS which has been cloned recently, so the settings are the same between nginx servers. One lives on a dev subdomain, one on a www. I'm trying to run a google experiment on my live server, which claims: Web server rejects utm_expid. Your server doesn't support added query arguments in URLs. My logs show on the dev server where it works: 74.125.186.32 - - [13/Sep/2012:13:33:45 -0700] "GET /product/iphone-case/?utm_expid=25706866-0 HTTP/1.1" 200 12521 "-" "Google_Analytics_Content_Experiments 74.125.186.32 - - [13/Sep/2012:13:33:45 -0700] "GET /product/iphone-case/?ab_reviews=True&utm_expid=25706866-0 HTTP/1.1" 200 14679 "-" "Google_Analytics_Content_Experiments My production server shows google making a second request. 74.125.186.41 - - [13/Sep/2012:13:34:49 -0700] "GET /product/iphone-case/?ab_reviews=on&utm_expid=25706866-1 HTTP/1.1" 200 12104 "-" "Google_Analytics_Content_Experiments 74.125.186.41 - - [13/Sep/2012:13:34:49 -0700] "GET /product/iphone-case/?utm_expid=25706866-1 HTTP/1.1" 200 12122 "-" "Google_Analytics_Content_Experiments 74.125.186.41 - - [13/Sep/2012:13:34:49 -0700] "GET /product/iphone-case/ <--- A second request for some reason. HTTP/1.1" 200 12522 "-" "Google_Analytics_Content_Experiments I'm not sure how google determines why it needs to send a second request without the querystring. The original request has clearly sent a 200 OK status response. Does anybody have any suggestions where to look next? The HTML (compared by diff) on the two pages is exactly the same.

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• Durability of Websockets Server

  - by smitchell360

  I am starting to experiment with websockets. Does anyone know of a websockets server (open source or paid) that provides a durable store of the websocket "channel"? All of the examples that I have found do not address durability -- if a websockets server goes down, all "channel" data is lost. Services such as Pusher do not really discuss whether they address the durability issue (and I have not received a response from tech support yet). Happy to roll my own, but would rather not reinvent the wheel. EDIT: I'm not looking for websockets 101 information. That is readily available and understood. I'm looking for a server (open source or paid) that supports websockets and has a durable store for the websocket data so that, in the event that a server fails, a new server can take over where the original one left off. Two main purposes: 1. support failover scenarios contemplated by the websockets Network Working Group http://tools.ietf.org/html/draft-ibc-websocket-dns-srv-02#section-5.1 (most importantly so that missed messages are sent when a client connects to a failover server) 2. support scenarios where new subscribers must receive all past messages that were published. Of course this can be handled at the application layer...but that is not what I am looking for.

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• Changing default openVPN IP in linux server

  - by Lamboo

  The problem is that we have a public OpenVPN service. Pay €9.95 and you get an OpenVPN account at currently half a dozen of servers for a month. This means there are always and will always be some people who create a certain amount of abuse or trouble. On the long run, the external IP every OpenVPN user gets assigned is prohibited from editing Wikipedia, it might be banned by e-gold and on some popular webforums, one-click-hosters, etc. Not a pleasant experience for the 97% of our customers who use our service responsibly and legitimately to regain their privacy. So even if I could change the assigned external IP every few months; e. g. from 216.xx.xx.164 to 216.xx.xx.170, it would help us a lot to combat this abuse and to provide our paying clients with "fresh" IP addresses that aren't banned or restricted on some popular Internet sites and services, yet. Does anybody know how to change the first IP address assigned to the public interface in CentOS? So that e.g. OpenVPN in future doesn't give our OpenVPN clients the external IP 123.xx.xx.164 but rather 123.xx.xx.170?

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• Cron won't use msmtp to send emails in case of failed cronjob

  - by Glister

  I'm trying to configure a machine so that it will send me an email if one of the cronjobs output something in case of an error. I'm using Debian Wheezy. Cron is working normally (without the email functionality). msmtp is installed and configured. Have already symlinked /usr/{bin|sbin}/sendmail to /usr/bin/msmtp. I can send email by using: echo "test" | mail -s "subject" [email protected] or by executing: echo "test" | /usr/sbin/sendmail Without the symlink (/usr/sbin/sendmail) cron will tell me that: (CRON) info (No MTA installed, discarding output) With the symlinks I get: (root) MAIL (mailed 1 byte of output; but got status 0x004e, #012) Can you suggest how to config the cron/msmtp pair? Thanks! EDIT: Note: I've written "msmtpd" by mistake. Its not a daemon but rather an SMTP client named just "msmtp" (without the "d" ending). It is executed on demand and it is not running in the background all the time. When I try to send an email by using msmtp like that it works: echo "test" | msmtp [email protected] On the far side, in the logs of the SMTP server I read: Nov 2 09:26:10 S01 postfix/smtpd[12728]: connect from unknown[CLIENT_IP] Nov 2 09:26:12 S01 postfix/smtpd[12728]: 532301C318: client=unknown[CLIENT_IP], sasl_method=CRAM-MD5, [email protected] Nov 2 09:26:12 S01 postfix/cleanup[12733]: 532301C318: message-id=<> Nov 2 09:26:12 S01 postfix/qmgr[2404]: 532301C318: from=<[email protected]>, size=191, nrcpt=1 (queue active) Nov 2 09:26:12 S01 postfix/local[12734]: 532301C318: to=<[email protected]>, orig_to=<[email protected]>, relay=local, delay=0.62, delays=0.59/0.01/0/0.03, dsn=2.0.0, status=sent (delivered to command: IFS=' ' && exec /usr/bin/procmail -f- || exit 75 #1001) Nov 2 09:26:12 S01 postfix/qmgr[2404]: 532301C318: removed Nov 2 09:26:13 S01 postfix/smtpd[12728]: disconnect from unknown[CLIENT_IP] And the Email is delivered to the target user. So it looks like that the msmtp client is working properly. It has to be something in the cron/msmtp integration, but I have no clue what that thing might be. Can you help me?

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• How can I write automated tests for iptables?

  - by Phil Frost

  I am configuring a Linux router with iptables. I want to write acceptance tests for the configuration that assert things like: traffic from some guy on the internet is not forwarded, and TCP to port 80 on the webserver in the DMZ from hosts on the corporate LAN is forwarded. An ancient FAQ alludes to a iptables -C option which allows one to ask something like, "given a packet from X, to Y, on port Z, would it be accepted or dropped?" Although the FAQ suggests it works like this, for iptables (but maybe not ipchains as it uses in the examples) the -C option seems to not simulate a test packet running through all the rules, but rather checks for the existence for an exactly matching rule. This has little value as a test. I want to assert that the rules have the desired effect, not just that they exist. I've considered creating yet more test VMs and a virtual network, then probing with tools like nmap for effects. However, I'm avoiding this solution due to the complexity of creating all those additional virtual machines, which is really quite a heavy way to generate some test traffic. It would also be nice to have an automated testing methodology which can also work on a real server in production. How else might I solve this problem? Is there some mechanism I might use to generate or simulate arbitrary traffic, then know if it was (or would be) dropped or accepted by iptables?

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• What is the point of PPPoE?

  - by aaa90210

  I am trying to expand my knowledge of networking beyond the basics. I have started reading about PPP, and how it is used in DSL modems with PPPoE and PPPoA. My first impression of PPP was "well that seems pretty similar to Ethernet". They are both data link layer protocols. They both have fields to identify the encapsulated protocol (e.g. IP). They both have related protocols to assign IP addresses (DHCP and NCP). So my first question was "so what's the point of PPP, why not just use Ethernet?". The answer to that was fairly straightforward - Ethernet is not supported over a wide range of media like serial lines, and is a fairly specific technology to LAN's using CAT5 or similar. HOWEVER - then I was reading about PPPoE, and the obvious thought was "well if we are doing something over Ethernet, then Ethernet must be available and in use, so why not just use it?". In other words, PPPoE seems to be encapsulating one data-link layer protocol in another very similar protocol. Why do IP-inside-PPP-inside-Ethernet when we could just be doing IP-inside-Ethernet, and use DHCP rather than NCP to assign the IP address to the home router? Thanks

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• sudo or acl or setuid/setgid ?

  - by Xavier Maillard

  Hi, for a reason I do not really understand, everyone wants sudo for all and everything. At work we even have as many entries as there are way to read a logfile (head/tail/cat/more, ...). I think, sudo is defeating here. I'd rather use a mix of setgid/setuid directories and add ACL here and there but I really need to know what are the best practices before starting up. Our servers have %admin, %production, %dba, %users -i.e many groups and many users. Each service (mysql, apache, ...) has its own way to install privileges but members of the %production group must be able to consult configuration file or even log files. There is still the solution to add them into the right groups (mysql...) and set the good permission. But I do not want to usermod all users, I do not want to modify standards permissions since it could change after each upgrade. On the other hand, setting acls and/or mixing setuid/setgid on directories is something I could easily do without "defacing" the standard distribution. What do you think about this ? Taking the mysql example, that would look like this: setfacl d:g:production:rx,d:other::---,g:production:rx,other::--- /var/log/mysql /etc/mysql Do you think this is good practise or should I definetely usermod -G mysql and play with standard permissions system ? Thank you

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• What Wireless Router/ADSL Modem to get? N-band a must!!

  - by JJarava

  I'm looking for a Dual-N band Router OR ADSL Gateway and I'd like some recommendations. Situation: I have a 802.11b/g ADSL gateway provided by my telco, but the WIFI signal won't cover all the house (especially the living-room, so my tv-connected Mac Mini has poor to no internet access). So I'm looking to either replace the DSL modem with a N-enabled one, or to add a Router to the mix. I've had a modem+router setup for many years, and I know the advantatges (double NAT, double FW = more security) and issues (more complex to troubleshoot, two possible points of failure), so I'd rather live with a single (ADSL Gateway) device, if possible. Requirements: Dual-N Band (300 Mbs WIFI) 1 GB Ethernet ports ADSL2+ support (if it's a ADSL gateway, which would be desirable) "Best" range and speed possible Nice to have: USB port to share disks/printers on the network Media streaming I've been a long time user of Linksys, so googling around I found the WRT610N (http://www.linksysbycisco.com/US/en/products/WRT610N) for a "Pure Router" perspective, and it's one of those that Linksys styles "N++" (http://www.linksysbycisco.com/US/en/promo/Promotion-Go-Wireless?stepname=Promotion-Step-Go-Wireless-High-Performance) But I haven't been able to find similar "ADSL" gateways. I've found the WAG320N, but there is little to no info in the Linksys site (i.e., i don't know if it's Dual Band, or if it has GB ethernet) Any opinions/recommendations of other products/suggestions are more than welcome.

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• Recommendations for colocation in the US

  - by Emil

  Hello serverfault I work for a European media company and we are currently looking for colocation in the US. I know the European market quite well unfortunately that is not the case for the US. I'm hoping for you guys to help me out a bit with a few questions, it would be much appreciated! I am looking for a data center that can deliver a high level of availability (tier 3 or better). The installation will be fairly large so capacity is important. Good internet connectivity/carrier presence. However most important is good customer support, skilled dedicated and responsive technical staff, since we won't have tech staff close by. I'm looking for a small and fast moving company that target internet businesses rather than big old enterprise hosting. What locations should we go for given that we want to reach all of the US from a single site and still maintain decent latency? (do we need east and west coast?) Where are the main internet hubs and should you try and get as close as possible? Are there any good online resources I should look at? Where do the large scale internet/media services colocate? Lastly I would be very happy to get some actual recommendations for companies to talk to P.S I'm happy to return the favor if anyone has question regarding data centers and colocation in Europe.

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• How to sync two computers using new MobileMe calendar

  - by CesarGon

  I have been using MobileMe for over a year with success. I use it to sync my Outlook calendars in my work and home computers, using Windows 7 and Outlook 2007. The main Outlook calendar folder in my work computer is replicated to MobileMe as "Work", and synced to my home computer, and the main calendar folder in my home computer is replicated to MobileMe as "Home", and synced to my work computer. This means that I can see both "Work" and "Home" calendars from both computers (as well as from the web interface through me.com), which is very convenient. Yesterday I migrated to the new MobileMe calendar, accepting the suggestion that popped up on the me.com website. After the migration, the MobileMe control panel on each of Windows computers asked me to re-configure my calendar setup, and everything fell apart. The "Home" and "Work" calendar folders in Outlook are now ignored by MobileMe, and new ones named "Home in MobileMe" and "Work in MobileMe" have been created, and placed in a separate Outlook data file rather than the default. This means that now: I now have four folders, two of which are not replicated to MobileMe The two folders that are not replicated reside on a separate data file, so alarms and reminders don't work; they're basically useless to me as calendar folders In addition, the button in the MobileMe Control Panel that used to let me specify what MobileMe folder should be synced against the default Outlook folder has gone. MobileMe is now too smart. Do you have any idea how to undo this mess and go back to a situation where I have two folders, as described in the top paragraph, which keep synced? I don't want an extra data file. Thanks.

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• Viability of Apache (MPM Worker), FastCGI PHP 4/5.2/5.3, and MySQL 5

  - by Adrian

  My server will be hosting numerous PHP web applications ranging from Joomla, Drupal, and some legacy (read: PHP4) and other custom-built code inherited from clients. This will be a development machine used by a dozen or so web developers and issues like fluctuating loads or particularly high load expectations are not important. Now, my question: are there any concerns I should know about when using Apache w/ MPM Worker, PHP 4/PHP 5.2/PHP 5.3 (all via FastCGI), and MySQL 5 (with a query cache of 64MB)? I have not tested the various applications extensively and I have only recently learned how to install PHP and utilize it via FastCGI (rather than mod_php, which in this case seemed impossible (considering the multiple versions of PHP and the desire to use MPM Worker over MPM Prefork)). I have come to understand that there could be concerns regarding XCache and APC, namely non-thread-safety issues where data becomes corrupted and the capability to use MPM Worker becomes null and void. Is this a valid concern? I have been using my personal testing server (running Ubuntu Server Edition 10.04 in VirtualBox) which has 2GB of RAM available to it. Here is the configuration used (the actual server will likely use a configuration more tailored to suit it's purposes): Apache: Server version: Apache/2.2.14 (Ubuntu) Server built: Apr 13 2010 20:22:19 Server's Module Magic Number: 20051115:23 Server loaded: APR 1.3.8, APR-Util 1.3.9 Compiled using: APR 1.3.8, APR-Util 1.3.9 Architecture: 64-bit Server MPM: Worker threaded: yes (fixed thread count) forked: yes (variable process count) Worker: <IfModule mpm_worker_module> StartServers 2 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxClients 400 MaxRequestsPerChild 2000 </IfModule> PHP ./configure (PHP 4.4.9, PHP 5.2.13, PHP 5.3.2): --enable-bcmath \ --enable-calendar \ --enable-exif \ --enable-ftp \ --enable-mbstring \ --enable-pcntl \ --enable-soap \ --enable-sockets \ --enable-sqlite-utf8 \ --enable-wddx \ --enable-zip \ --enable-fastcgi \ --with-zlib \ --with-gettext \ Apache php-fastcgi-setup.conf FastCgiServer /var/www/cgi-bin/php-cgi-5.3.2 FastCgiServer /var/www/cgi-bin/php-cgi-5.2.13 FastCgiServer /var/www/cgi-bin/php-cgi-4.4.9 ScriptAlias /cgi-bin-php/ /var/www/cgi-bin/

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