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• Some URLs fail to load on Windows web portal

  - by jpolache

  I’m working in a large data center and have been assigned to troubleshoot and issue with a windows (IIS) web server that acts as a portal for a customer of the data center. This portal server is on a DMZ at the local data center. I don’t have access to the portal desktop and am relying on an off-site administrator to work with me to do testing and report the condition of the portal. He tells me there are no software firewalls or other filtering configured. While most of the remote web pages work fine, several of the URSs the portal is suppose to serve up fail to load. I had wireshark installed on the portal system and had a capture taken of one of the failures. I used IE to access one of the remote web servers at issue. I could see the TCP SYN-ACK coming back from the remote server, but after several HTTP GETs fail to get a response the portal server sends a reset. The webmaster of the remote web server assures me that no sites are being blocked. I had a capture taken outside the local firewall, so there should be no issue there. Another tech set up a laptop and used the IP address of the portal (we took the portal off-line for the test). The laptop loads the URL as expected. I tried having Firefox loaded to make sure that the HTTP GET was not mal-formed. Same failure as with IE. So, it seems it is not the remote web server or the network, because there was no problem with the laptop. At this point, I’m not sure what other questions to ask or tests to do.

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• Dante (SOCKS server) not working

  - by gregmac

  I'm trying to set up a SOCKS proxy using dante for testing purposes. However, I can't even get it to work with a web browser, after looking at several tutorials on how to do that. I've tried in both IE and Firefox, in both cases, using "Manual proxy configuration", leave everything blank except for SOCKS host, and then put in the IP of my proxy and the port number (1080). I just get "Server not found" / "Problems loading this page" and don't see anything in danted, even running in debug mode. If I do a "telnet 10.0.0.40 1080" I do see the connection open in danted debug output, so I know that much is working. Here's my config: logoutput: stdout /var/log/danted/danted.log internal: eth0 port = 1080 external: eth0 method: username none #rfc931 user.privileged: proxy user.notprivileged: nobody user.libwrap: nobody connecttimeout: 30 # on a lan, this should be enough if method is "none". client pass { from: 10.0.0.0/8 port 1-65535 to: 0.0.0.0/0 } client pass { from: 127.0.0.0/8 port 1-65535 to: 0.0.0.0/0 } client block { from: 0.0.0.0/0 to: 0.0.0.0/0 log: connect error } block { from: 0.0.0.0/0 to: 127.0.0.0/8 log: connect error } pass { from: 10.0.0.0/8 to: 0.0.0.0/0 protocol: tcp udp } pass { from: 127.0.0.0/8 to: 0.0.0.0/0 protocol: tcp udp } block { from: 0.0.0.0/0 to: 0.0.0.0/0 log: connect error } I'm sure I'm probably missing something simple, but I'm lost. I haven't even thought about SOCKS since the late 90's.

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• Pattern matching gnmap fields with SED

  - by Ovid

  I am testing the regex needed for creating field extraction with Splunk for nmap and think I might be close... Example full line: Host: 10.0.0.1 (host) Ports: 21/open|filtered/tcp//ftp///, 22/open/tcp//ssh//OpenSSH 5.9p1 Debian 5ubuntu1 (protocol 2.0)/, 23/closed/tcp//telnet///, 80/open/tcp//http//Apache httpd 2.2.22 ((Ubuntu))/, 10000/closed/tcp//snet-sensor-mgmt/// OS: Linux 2.6.32 - 3.2 Seq Index: 257 IP ID Seq: All zeros I've used underscore "_" as the delimiter because it makes it a little easier to read. root@host:/# sed -n -e 's_\([0-9]\{1,5\}\/[^/]*\/[^/]*\/\/[^/]*\/\/[^/]*\/.\)_\n\1_pg' filename The same regex with the escape characters removed: root@host:/# sed -n -e 's_\([0-9]\{1,5\}/[^/]*/[^/]*//[^/]*//[^/]*/.\)_\n\1_pg' filename Output: ... ... ... Host: 10.0.0.1 (host) Ports: 21/open|filtered/tcp//ftp///, 22/open/tcp//ssh//OpenSSH 2.0p1 Debian 2ubuntu1 (protocol 2.0)/, 23/closed/tcp//telnet///, 80/open/tcp//http//Apache httpd 5.4.32 ((Ubuntu))/, 10000/closed/tcp//snet-sensor-mgmt/// OS: Linux 9.8.76 - 7.3 Seq Index: 257 IPID Seq: All zeros ... ... ... As you can see, the pattern matching appears to be working - although I am unable to: 1 - match on both the end of line ( comma , and white/tabspace). The last line contains unwanted text (in this case, the OS and TCP timing info) and 2 - remove any of the un-necessary data - i.e. print only the matching pattern. It is actually printing the whole line. If i remove the sed -n flag, the remaining file contents are also printed. I can't seem to locate a way to only print the matched regex. Being fairly new to sed and regex, any help or pointers is greatly appreciated!

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• Ubuntu 11.10 ATI Drivers vesa park

  - by Matthias

  This is probably not an issue, from all I can get it seems my hardware and drivers are properly installed. However when I go to system settings - system info - graphics. I get Driver: VESA:PARK. Experience: Standard. my graphics card is a: Ati Mobility Radeon HD 5470 512MB. I am pretty sure it's not a same-die GPU since there is a fan exhaust at the side of my laptop which I presume is the exhaust for the GPU... I have no clue whatsoever what this means. I installed the ati drivers first using the 'additional drivers' method. However I also decided to look a manual installation up via the terminal since I've had problems before with Ubuntu and ati cards. I used wget and something among the lines of sh dpkg -i. I can recall exactly, I took them from another stackoverflow answer. Anyway, it seems everything is installed properly since it shows up with these commands: sudo lshw -C video fglrxinfo however the first command seems to detect hardware, not the driver per se, although the driver is probably needed to detect the hardware anyway which would indicate its properly installed. I am still not sure about that VES:PARK thing though. I'd like to know what it means.. Also, if someone happens to know a good way of testing if the gpu is connected/being used...some sort of benchmark maybe...I'd like to hear it. P.s. I can find my way around in Ubuntu but I would probably still be considered a rookie by more experienced users.

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• Why are group policy preference drive mappings not applied to the domain administrator account?

  - by Saariko

  I have a working policy on my entire domain. I just found out, when logging with the domain administrator, that this policy is not applied (EDIT: Running : gpresult shows that the GPO's are applied - but, this GPO is for Drive Mappings, and the actual drive mappings are NOT shown) The administrator account - does not have any login script on his profile tab. To note: The mappings were applied before the GPO with a login script using the : net use ... command - all was working perfectly and correctly for the domain administrator user as well - That removes sharing and security problem (IMO) My GPO's are mainly small/atomic settings: single GPO to handle each settings: UAC, Firewall, printers. GPO status for the object is enabled That's an overview of the Drive Maps: Reading on MS support site, I checked the delegation tab, and it is marked as applied to domain and enterprise admins. Every user gets these policies correctly. The OU that is set is the root of the domain. (for testing purpose - I did that to eliminate hierarchy issues - did not help) Block Inheritance is disabled. (never used it anyway) GPO link GPO Security Filterings

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• VMware and Windows Activation

  - by Peter M

  Yesterday I installed Slysoft's Virtual CloneDrive in order to mount an iso for some software installation on my host system (XP Pro SP3) This morning I fired up VMware and made a linked clone of an existing XP vm in order to do some software testing. This is the sort of thing that I do all the time, and the base XP vm that I clone was activated a long long time ago. The surprise today was that the newly cloned vm was no longer activated and XP cited major changes in hardware as the reason. I repeated the test with a full clone of the base system and got the same message. I then started up my base vm and it seemed to be activated, yet another vm (which I fully cloned from the base vm a long time ago) now started reporting that XP was not activated. At this point I guessed that Virtual DriveClone might have been the source of my hardware differences so I uninstalled it and rebooted. After this I made a new linked clone and full clone of the base vm and XP did not complain about not being activated. So I seem to be back to where I was before installing Virtual DriveClone with the exception that that one particular XP vm continues to complain about activation (even though 4 or 5 other XP vm's are fat and happy) Now to my questions: Why would adding Virtual CloneDrive to the host system affect XP activation on the vm's? From their point of view I would have thought that the environment had not changed as I had not enabled any new hard drives in their systems. Or is adding a hard drive to the host system enough to upset XP activation? Since this event, one of my fully cloned vm's is still reporting that XP is not activated even though I have removed Virtual CloneDrive. Is there anyway to convince XP that it is on the same system as yesterday? Or are my only options to do an activation or restore the vm from a previous backup?

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• SharePoint Records Center Submitted E-mail Records not picked up

  - by Kenneth Verburg

  We have set up a new SharePoint 2007 site with a Records Repository. We're using Exchange 2007 Managed Folders to route e-mails to this repository based on the 'label' attached to the e-mail as set in the Exchange 2007 journaling options. E-mails added to a Managed Folder get sent to SharePoint, they end up in the "Submitted E-mail Records" list of the Records Repository. That's according to plan, but the e-mails are not routed to the respective document library as defined by the label. Instead an error appears in the event viewer for every e-mail listed in the Submitted E-mail Records list, on every interval of the records repository schedule (set to every two minutes for testing purposes): Value cannot be null, parameter name: g. Sending a document from the SharePoint site iself to the Records Repository via the Send To... link works fine, but e-mails get stuck in the list... We have set Document Libraries in the Respository with and without content types (with matching names with the Label and the Record Routing rule set). Any ideas what could be wrong? This is in the event log: Every two minutes the following error appears in the Application Log: Source: Office SharePoint Server Category: Records Center Type: Error Event ID: 4975 User: N/A Computer: SPS2007 Description: Value cannot be null. Parameter name: g For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

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• How do hdparm's -S and -B options interact?

  - by user697683

  These two options seem confusing. For example: according to the man page -B 254 "does not permit spin-down". However, testing with -B 254 -S 1 the drive does spin down after 5 seconds. -B Query/set Advanced Power Management feature, if the drive supports it. A low value means aggressive power management and a high value means better performance. Possible settings range from values 1 through 127 (which permit spin-down), and values 128 through 254 (which do not permit spin-down). The highest degree of power management is attained with a setting of 1, and the highest I/O performance with a setting of 254. A value of 255 tells hdparm to disable Advanced Power Management altogether on the drive (not all drives support disabling it, but most do). -S Put the drive into idle (low-power) mode, and also set the standby (spindown) timeout for the drive. This timeout value is used by the drive to determine how long to wait (with no disk activity) before turning off the spindle motor to save power. Under such circumstances, the drive may take as long as 30 seconds to respond to a subsequent disk access, though most drives are much quicker. The encoding of the timeout value is somewhat peculiar. A value of zero means "timeouts are disabled": the device will not automatically enter standby mode. Values from 1 to 240 specify multiples of 5 seconds, yielding timeouts from 5 seconds to 20 minutes. Values from 241 to 251 specify from 1 to 11 units of 30 minutes, yielding timeouts from 30 minutes to 5.5 hours. A value of 252 signifies a timeout of 21 minutes. A value of 253 sets a vendor-defined timeout period between 8 and 12 hours, and the value 254 is reserved. 255 is interpreted as 21 minutes plus 15 seconds. Note that some older drives may have very different interpretations of these values.

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• Apache2 - Hosting two sites on the same domain with different ports

  - by user1026361

  I am hosting a staging site (test.mydomain.com) which currently work well on port 80 for two sites (test.mydomain.com and test.FRmydomain.com) I am working on a new backend and I would like to deploy a third site on this server for testing. My hope is that it will live at test.mydomain.com:4204. I've got some experience with apache and quickly added statements: Listen 4204 NameVirtualHost *:4204 and created a new config for my site. What I imagine are the relevant parts of my config: <VirtualHost *:4204 > ServerAdmin [email protected] ServerName test.mydomain.com:4204 However, the site is not publicly available, by name or ip. If i curl localhost:4204 from the server, I get the expected page content At this point, I'm a bit of a loss on how to go forwards. It seems like my config is correct but not available to be served. Am I better off defining a proxy definition so that, for instance: test.mydomain.com/4204 proxies to my localhost server or is there a way to make the site available via the internet? EDIT: I have added an iptable rule after further Googling with the command: iptables -I INPUT -p tcp --dport 4204 -j ACCEPT I can see apache listening on 4204 and the rule is definitely in place but cant reach the site

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• Security for university research lab systems

  - by ank

  Being responsible for security in a university computer science department is no fun at all. And I explain: It is often the case that I get a request for installation of new hw systems or software systems that are really so experimental that I would not dare put them even in the DMZ. If I can avoid it and force an installation in a restricted inside VLAN that is fine but occasionally I get requests that need access to the outside world. And actually it makes sense to have such systems have access to the world for testing purposes. Here is the latest request: A newly developed system that uses SIP is in the final stages of development. This system will enable communication with outside users (that is its purpose and the research proposal), actually hospital patients not so well aware of technology. So it makes sense to open it to the rest of the world. What I am looking for is anyone who has experience with dealing with such highly experimental systems that need wide outside network access. How do you secure the rest of the network and systems from this security nightmare without hindering research? Is placement in the DMZ enough? Any extra precautions? Any other options, methodologies?

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• mod_rewrite REQUEST_FILENAME doesn't contain absolute path

  - by Paul Dixon

  I have a problem with a file test operation in a mod_rewrite RewriteCond entry which is testing whether %{REQUEST_FILENAME} exists. It seems that rather than %{REQUEST_FILENAME} being an absolute path, I'm getting a path which is rooted at the DocumentRoot instead. Configuration I have this inside a <VirtualHost> block in my apache 2.2.9 configuration: RewriteEngine on RewriteLog /tmp/rewrite.log RewriteLogLevel 5 #push virtually everything through our dispatcher script RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^/([^/]*)/?([^/]*) /dispatch.php?_c=$1&_m=$2 [qsa,L] Diagnostics attempted That rule is a common enough idiom for routing requests for non-existent files or directories through a script. Trouble is, it's firing even if a file does exist. If I remove the rule, I can request normal files just fine. But with the rule in place, these requests get directed to dispatch.php Rewrite log trace Here's what I see in the rewrite.log init rewrite engine with requested uri /test.txt applying pattern '^/([^/]*)/?([^/]*)' to uri '/test.txt' RewriteCond: input='/test.txt' pattern='!-f' => matched RewriteCond: input='/test.txt' pattern='!-d' => matched rewrite '/test.txt' -> '/dispatch.php?_c=test.txt&_m=' split uri=/dispatch.php?_c=test.txt&_m= -> uri=/dispatch.php, args=_c=test.txt&_m= local path result: /dispatch.php prefixed with document_root to /path/to/my/public_html/dispatch.php go-ahead with /path/to/my/public_html/dispatch.php [OK] So, it looks to me like the REQUEST_FILENAME is being presented as a path from the document root, rather than the file system root, which is presumably why the file test operator fails. Any pointers for resolving this gratefully received...

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• Passing PATH through sudo

  - by whitequark

  In short: how to make sudo not to flush PATH everytime? I have some websites deployed on my server (Debian testing) written with Ruby on Rails. I use Mongrel+Nginx to host them, but there is one problem that comes when I need to restart Mongrel (e.g. after making some changes). All sites are checked in VCS (git, but it is not important) and have owner and group set to my user, whereas Mongrel runs under the, huh, mongrel user that is severely restricted in it's rights. So Mongrel must be started under root (it can automatically change UID) or mongrel. To manage mongrel I use mongrel_cluster gem because it allows starting or stopping any amount of Mongrel servers with just one command. But it needs the directory /var/lib/gems/1.8/bin to be in PATH: this is not enough to start it with absolute path. Modifying PATH in root .bashrc changed nothing, tweaking sudo's env_reset and keepenv didn't either. So the question: how to add a directory to PATH or keep user's PATH in sudo?

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• GRE Tunnel over IPsec with Loopback

  - by Alek

  Hello, I'm having a really hard time trying to estabilish a VPN connection using a GRE over IPsec tunnel. The problem is that it involves some sort of "loopback" connection which I don't understand -- let alone be able to configure --, and the only help I could find is related to configuring Cisco routers. My network is composed of a router and a single host running Debian Linux. My task is to create a GRE tunnel over an IPsec infrastructure, which is particularly intended to route multicast traffic between my network, which I am allowed to configure, and a remote network, for which I only bear a form containing some setup information (IP addresses and phase information for IPsec). For now it suffices to estabilish a communication between this single host and the remote network, but in the future it will be desirable for the traffic to be routed to other machines on my network. As I said this GRE tunnel involves a "loopback" connection which I have no idea of how to configure. From my previous understanding, a loopback connection is simply a local pseudo-device used mostly for testing purposes, but in this context it might be something more specific that I do not have the knowledge of. I have managed to properly estabilish the IPsec communication using racoon and ipsec-tools, and I believe I'm familiar with the creation of tunnels and addition of addresses to interfaces using ip, so the focus is on the GRE step. The worst part is that the remote peers do not respond to ping requests and the debugging of the general setup is very difficult due to the encrypted nature of the traffic. There are two pairs of IP addresses involved: one pair for the GRE tunnel peer-to-peer connection and one pair for the "loopback" part. There is also an IP range involved, which is supposed to be the final IP addresses for the hosts inside the VPN. My question is: how (or if) can this setup be done? Do I need some special software or another daemon, or does the Linux kernel handle every aspect of the GRE/IPsec tunneling? Please inform me if any extra information could be useful. Any help is greatly appreciated.

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• Adding new SPNs to existing service ids

  - by jmh

  We have a tomcat server using spring-security kerberos to authenticate users to the webpage against active directory. There are around 25 domain controllers. The site has two CNAME based DNS aliases. The site currently has one Service ID with SPNs registered for the DNS A record as well as each of the CNAMEs. While everything is working right now, I don't know how to reliably change this configuration without possible downtime. The reason is that clients cache kerberos tickets: http://www.juniper.net/techpubs/en_US/uac4.2/topics/concept/user-role-active-directory-about.html The 'kerbtray.exe' program is helpful for viewing and deleting Kerberos tickets on the endpoint. Old tickets must be purged from the endpoint if SPNs are updated or passwords are changed (assuming the endpoint still has a cached copy of the ticket from a prior SPNEGO request to the MAG Series device. During testing, you should purge tickets before each authentication request. Description of "klist" program used to inspect/delete cached tickets: http://technet.microsoft.com/en-us/library/hh134826.aspx So if each of the clients (users running windows) who connect to my web server have kerberos tickets that become invalid as soon as I update the SPNs or passwords, how do I ensure changes are seamless? Are there any operations that can be done safely? I can't just ask all of the users to install klist and delete their old tickets.

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• DNS-Based Environment Determination

  - by zvolkov

  Found the following here. The questions is: where can I find more details on how exactly implement this on Windows? Any guide or how-to anybody? Or maybe you can provide your invaluable suggestions? Specifically, how do I make so that "all QA servers would first resolve entries in qa.example.com first and then if that lookup failed they would try example.com" (I'm a dev, not a DNS specialist, but our IT Support has refused to help on this:() Use DNS Based Environment Determination for your servers. Do this by initially splitting your top level domain into a number of sub domains depending on their function, and then creating DNS Service Names in each of the sub domains pointing to the relevant server for that service. Based on the list above we would then have: * clientdb.prod.example.com for Production * clientdb.perf.example.com for Performance Testing * clientdb.qa.example.com for QA * clientdb.dev.example.com for Development Servers then resolve entries in their relevant sub domain by function. That is, all QA servers would first resolve entries in qa.example.com first and then if that lookup failed they would try example.com. This allows you to have a single configuration entry for your client database hostname (clientdb) that would resolve correctly in all environments. This technique has the added advantage of still having global services defined in a common top level domain. This seems to be related to Providing "split horizon" DNS service. Reading that, I see that I will probably need separate DNS Server for each environment. Is this true or does Windows support some form of "tagging" the records to be visible depending on the requestor's IP?

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• Does AMD Cool n Quiet Slow Down Your System?

  - by Software Monkey

  I discovered today that having AMD Cool n Quiet enabled in my BIOS appears to be slowing down my Windows XP SP2 system by about 29% on memory & CPU intensive workloads. I was wondering if (a) anyone else had encountered this, (b) anyone can offer an explanation, (c) there are any negatives I need to be aware of if I keep AMD CnQ disabled. With some superficial testing so far, I don't immediately notice any difference with CnQ off (other than the performance being what I expected from this new hardware). It seems to ramp up the CPU fan a little bit as my program maxes out 1 core, but that's the same as with CnQ on. And when I let the system idle the CPU fan slows down and the systems as quiet as a mouse (after years of 6 small fans churning like they want to go into orbit it's nice to again have a system where I can hear the HDDs seeking). Bonus question: Does CnQ cause issues with system stability? I ask because the reason I disabled it was because I have had a few freezes and 1 spontaneous reboot with my new hardware.

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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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• Successful login with iscsiadm on target still doesn't create block device

  - by Halfgaar

  I've set up an experiment to test iscsitarget and initiator, which at some point worked. Later, I turned the setup back on and much to my dismay, the initiator machine stopped making block devices for its successful logins. As far as I know, I haven't changed anything on either machine. Some details: # iscsiadm -m node --login Logging in to [iface: default, target: iqn.2010-12.nl.ytec.arbiter:arbiter.lun1, portal: 10.0.0.1,3260] Logging in to [iface: default, target: iqn.2010-12.nl.ytec.arbiter:arbiter.lun2, portal: 10.0.0.1,3260] Login to [iface: default, target: iqn.2010-12.nl.ytec.arbiter:arbiter.lun1, portal: 10.0.0.1,3260]: successful Login to [iface: default, target: iqn.2010-12.nl.ytec.arbiter:arbiter.lun2, portal: 10.0.0.1,3260]: successful Sessions: # iscsiadm -m session tcp: [3] 10.0.0.1:3260,1 iqn.2010-12.nl.ytec.arbiter:arbiter.lun1 tcp: [4] 10.0.0.1:3260,1 iqn.2010-12.nl.ytec.arbiter:arbiter.lun2 Netstat: # netstat -n -p|grep 3260 tcp 0 0 10.0.0.2:48719 10.0.0.1:3260 ESTABLISHED 1078/iscsid tcp 0 0 10.0.0.2:48718 10.0.0.1:3260 ESTABLISHED 1078/iscsid /var/log/syslog doesn't give errors: Jan 27 11:41:49 vmnode001 kernel: [ 378.041749] scsi7 : iSCSI Initiator over TCP/IP Jan 27 11:41:49 vmnode001 kernel: [ 378.044180] scsi8 : iSCSI Initiator over TCP/IP lsscsi doesn't show my devices: [0:0:1:0] cd/dvd TSSTcorp DVD-ROM TS-L333A D100 /dev/sr0 [4:0:0:0] disk ATA Hitachi HUA72105 A74A - [4:0:1:0] disk ATA Hitachi HUA72105 A74A - [4:1:0:0] disk Dell VIRTUAL DISK 1028 /dev/sda And there are no block devices in /dev for it: # ls -1 /dev/sd* /dev/sda /dev/sda1 /dev/sda2 /dev/sda3 /dev/sda4 I tried loading all scsi kernel modules I could find, but that doesn't seem to be the problem. I reall don't get this; it used to work. I found people with similar problems (here and here) but no solution. Initiator is Debian Sqeeuze (testing), target is Debian Lenny (stable). iscsitarget is 0.4.16+svn162-3.1+lenny1, open-iscsi (initiator) is 2.0.871.3-2squeeze1. Target kernel: 2.6.26-2-amd64, initiator kernel: 2.6.32-5-amd64

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• Repository bugzilla package changed to bugzilla3 in Lenny; upgradable?

  - by Pukku

  This question was asked in debianhelp.org almost half a year ago, but never got an answer. I wasn't the one who posted it, however I was today facing exactly the same question. Not sure if copying it to here as such is considered as inappropriate or something, but there's not really anything that I would even like to paraphrase... So let's just go. (I'm sure you will be happy to close it, if this is not the way to go :) Hello all! We are using a Bugzilla server install on a Debian 4/Etch server and are starting to look at the upgrade to Debian 5/Lenny. I was hoping to upgrade the existing Bugzilla server and database from the oldstable (v2.22) to the newer stable in Lenny (v3) when we get to doing a dist-upgrade. However from testing in a virtual machine it seems that the old package was called "Bugzilla" whereas the Lenny package is called "Bugzilla3" and I could not figure a way to directly upgrade between the two. Is it possible to establish some kind of upgrade path quickly after the dist-upgrade to minimise downtime using apt-get or aptitude? Going on past experiences I would not want to do a fresh install with the Bugzilla3 package and attempt to inject the old database into it (previous attempts failed miserably!) :(

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• Dos/ Flood Lag even though Port not Saturated

  - by Asad Moeen

  My GameServers had been under some UDP Floods due to which they generated outputs to the attacker which gave the GameServers some huge lags. Thanks to friends at ServerFault that upon different kind of testing, I was able to successfully block the attack. My question is actually something else but it is important to know how the GameServers reacted to the attack and if the machine kept stable or not: 300kb/s Input would cause GameServer to generate 2mb/s Output. So as the Input Rate kept increasing, output rate would reach so high that it would no longer be possible for the GameServer to control it and hence it would give a huge Lag until the attack is stopped. Usually the game server starts to lag when it sends out something greater than 5mb/s and under that is controllable. Theoretically, I was able to receive a 60mb/s output from my GameServer on inputting 10mb/s. Its just the way the GameServer works if not protected. Now on some of my machines, only the GameServer under attack lagged and although the server was generating 60mb/s output, rest of the gameservers on other ports would run fine without lags on the same machine. But there was another machine which also runs on a 100 MBPS Network port, even 1 mbps input ( and ZERO output because attack is blocked ) even on an unused port would give a constant yellow line ( on the Lag-o-Meter ) to all the clients on all GameServers indicating lag because that line is actually blue under normal conditions. It would remain the same even on 50mbps or 900mbps input. I tried contacting the host about it because I believe its the way their Network is bridged, but they can't help me about it. Anyone else knowing about such issues because if 900mbps input does not Saturate the port, how can 1mbps input lag the servers although port is not saturated and enough bandwidth is available?

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• Outlook 2007/2010 autodiscovering old Exchange info

  - by Dan

  I currently have an Exchange setup as follows: two Exchange 2003 servers clustered together set up as the current mailbox stores, one Exchange 2003 setup as a frontend, one Exchange 2007 set up as a frontend (was set up for testing by my predecessor, never really used intentionally), and now four Exchange 2010 servers - two mailboxes in a DAG and two with Hub/CAS. Everything seems to be working fine with one exception - Outlook 2007/2010 clients are still autodiscovering the test 2007 frontend and not the 2010 CAS array. I know this because there's an expired cert on the 2007 box so the client displays a cert error when you attempt to autocreate the outlook profile. From what I've read, there is an SCP (Service Connection Point) in AD that is pointing to the old server and it is getting returned first, causing Outlook to try it first. How can I prevent Outlook from even attempting to connect to this 2007 box from now on? http://www.msexchange.org/articles_tutorials/exchange-server-2010/management-administration/exchange-autodiscover.html When Outlook 2007 is installed on a domain joined workstation then the Outlook client will query Active Directory for the Autodiscover information. Active Directory will return a list of SCP’s and the Outlook client will automatically select the first SCP in this list. Using the information found in the SCP the Outlook client will contact the Client Access Server for its configuration information and the Outlook client will be configured automatically.

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• Using mod_rewrite to mask /cgi-bin/abc as /def

  - by Alois Mahdal

  I have a seemingly easy task, but somehow I just can't get it to work: Some interesting lines from my httpd.conf: ... DocumentRoot "D:/opt/apache/htdocs" ... ScriptAlias /cgi-bin/ "D:/opt/apache/cgi-bin/" ... <Directory "D:/opt/apache/htdocs"> Options Indexes FollowSymLinks ExecCGI AllowOverride None Order allow,deny Allow from all </Directory> <Directory "D:/opt/apache/cgi-bin/"> AllowOverride None Options ExecCGI Order allow,deny Allow from all </Directory> (I know it's dumb but it's only a testing machine :D.) Now, I have d:\opt\apache\cgi-bin\expired.pl and I expect GET /licensecheck.php?code=123456. And I wish to fake client into thinking it speaks with /licensecheck.php, but actually return data by \expired.pl. What I tried was setting following at the end of http.conf: RewriteEngine on RewriteRule ^/licensecheck.php$ /cgi-bin/expired.pl [T=application/x-httpd-cgi,L] ...but it keeps 404-ing me, looking for cgi-bin directory (not cgi-bin\expired.pl) in my DocumentRoot! [error] [client 127.0.0.1] script not found or unable to stat: D:/opt/apache/htdocs/cgi-bin /cgi-bin/expired.pl and all other scripts in /cgi-bin/ work as expected, Only way I could make it work was actually putting the \expired.pl to DocumentRoot, but I don't want this, I want my cgi-bin neatly separated :)

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• Force local IP traffic to an external interface

  - by calandoa

  I have a machine with several interfaces that I can configure as I want, for instance: eth1: 192.168.1.1 eth2: 192.168.2.2 I would like to forward all the traffic sent to one of these local addresses through the other interface. For instance, all requests to an iperf, ftp, http server at 192.168.1.1 should be not just routed internally, but forwarded through eth2 (and the external network will take care of re-routing the packet to eth1). I tried and looked at several commands, like iptables, ip route, etc... but nothing worked. The closest behavior I could get was done with: ip route change to 192.168.1.1/24 dev eth2 which send all 192.168.1.x on eth2, except for 192.168.1.1 which is still routed internally. May be I could then do NAT forwarding of all traffic directed to fake 192.168.1.2 on eth1, rerouted to 192.168.1.1 internally? I am actually struggling with iptables, but it is too tough for me. The goal of this setup is to do interface driver testing without using two PCs. I am using Linux, but if you know how to do that with Windows, I'll buy it!

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• openSSL tutorial not fully working - Can sign but cannot restore original file

  - by djechelon

  I'm writing, and testing, a little tutorial for my groupmates involved in an openSSL homework. We have a bunch of PDF files, I'm the CA and each one should send me a signed PDF for me to be verified. I've told them to do the following (and tried to do it by myself) Request and obtain a certificate (I'll skip this part) Create a MIME message with the PDF file in it makemime -c "text/pdf" -a "Content-Disposition: attachment; filename=”Elaborato.pdf" Elaborato.pdf > Elaborato.pdf.msg Sign with openSSL openssl smime -sign -in Elaborato.pdf.msg -out Elaborato.pdf.p7m -certfile ca.pem -certfile nomegruppo.crt -inkey nomegruppo.key -signer nomegruppo.crt Verify with openssl smime -verify -in Elaborato.pdf.p7m -out Elaborato-verified.msg -CAfile ca.pem -signer nomegruppo.crt Extract attachment with munpack Elaborato-verified.msg View with Acrobat Reader The problem is that even if I get a file that (from its binary content) resembles a PDF file my current Ubuntu PDF viewer doesn't read it. The XXXElaborato.pdf extracted by munpack is a little bit smaller than the original. What's the problem with this procedure? In theory, they should send me the signed S/MIME message and I should be able to read the PDF within it. Why can't I restore the original content of the PDF file?

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• Karmic iptables missing kernel moduyles on OpenVZ container

  - by luison

  After an unsuccessful p2v migration of my Ubuntu server to an OpenVZ container which I am stack with I thought I would give a try to a reinstall based on a clean OpenVZ template for Ubuntu 9.10 (from the OpenVZ wiki) When I try to load my iptables rules on the VM machine I've been getting errors which I believe are related to kernel modules not being loaded on the VM from the /vz/XXX.conf template model. I've been testing with a few post I've found but I was stack with the error: WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/. FATAL: Could not load /lib/modules/2.6.24-10-pve/modules.dep: No such file or directory iptables-restore v1.4.4: iptables-restore: unable to initialize table 'raw' Error occurred at line: 2 Try `iptables-restore -h' or 'iptables-restore --help' for more information. I read about the template not loading all iptables modules so I added modules to the XXX.conf of the VZ virtual machine like this: IPTABLES="ip_tables iptable_filter iptable_mangle ipt_limit ipt_multiport ipt_tos ipt_TOS ipt_REJECT ipt_TCPMSS ipt_tcpmss ipt_ttl ipt_LOG ipt_length ip_conntrack ip_conntrack_ftp ip_conntrack_irc ipt_conntrack ipt_state ipt_helper iptable_nat ip_nat_ftp ip_nat_irc" As the error remained I read that I should build dependencies again on the virtual machine: depmod -a but this returned an error: WARNING: Couldn't open directory /lib/modules/2.6.24-10-pve: No such file or directory FATAL: Could not open /lib/modules/2.6.24-10-pve/modules.dep.temp for writing: No such file or directory So I read again about creating the directory empty and redoing "depmod -a" it. I now don't get the dependancies error but get this and I don't have a clue how to proceed: WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/. FATAL: Module ip_tables not found. iptables-restore v1.4.4: iptables-restore: unable to initialize table 'raw' Error occurred at line: 2 Try `iptables-restore -h' or 'iptables-restore --help' for more information. I understand that iptables rules have to be different on the VM machine and perhaps some of the rules we are trying to apply (from our physical server) are not compatible but these are just source IP and destination port checks that I would like to be able to have available . I've heard that on the CentOS template there are no issues with this, so I understand is to do with VM config. Any help would be greatly appreciated.

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