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• How can one restrict network activity to only the VPN on a Mac and prevent unsecured internet activity?

  - by John

  I'm using Mac OS and connect to a VPN to hide my location and IP (I have the 'send all traffic over VPN connection' box checked in teh Network system pref), I wish to remain anonymous and do not wish to reveal my actual IP, hence the VPN. I have a prefpan called pearportVPN that automatically connects me to my VPN when I get online. The problem is, when I connect to the internet using Airport (or other means) I have a few seconds of unsecured internet connection before my Mac logs onto my VPN. Therefore its only a matter of time before I inadvertently expose my real IP address in the few seconds it takes between when I connect to the internet and when I log onto my VPN. Is there any way I can block any traffic to and from my Mac that does not go through my VPN, so that nothing can connect unless I'm logged onto my VPN? I suspect I would need to find a third party app that would block all traffic except through the Server Address, perhaps Intego Virus Barrier X6 or little snitch, but I'm afraid I'm not sure which is right or how to configure them. Any help would be much appreciated. Thanks!

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• What tools can I use to locate the IP of a machine on my network?

  - by user134918

  I am logged in to a remote Windows Server machine and am trying to attach it to a VPN for a LAN that I am also connected to locally from another Windows machine using Remotr Desktop. I can connect the remote machine to the VPN but when I do so, I lose my remote desktop connection. I am now in a situation where I know/think that the remote machine is on my LAN, but do not know what its current IP is and can therefor not connect to it again. I do not have any control over the infrastructure, all I have is a remote machine that I do control, and another machine that I also control that is connected to the same LAN as I'm trying to get the remote machine on using the existing VPN. What tools are available for Windows to allow me to locate the machine on my LAN again? I am imagining that there must be a tool that broadcasts the machines new IP using multicast, or tries to log in to a server component running somewhere with a know IP. Effectively, I am looking for some software that I can run on my remote machine, as well as my local machine, to allow me to discover the new IP address (on the LAN) assigned to the remote machine after connecting to the VPN.

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• Explain why .bash_logout won't run commands?

  - by Droogans

  So I've been wondering how to run these two lines of code everytime I close an open instance of Terminal: history -c cat /dev/null > ~/.bash_history I export HISTFILE=5 on startup, but still want to flush that out when I'm done. I've tried looking around a bit in a couple of places, and haven't had much luck. I run Linux Mint, and would also note here that I ran into a similar issue with .bash_profile; eventually, I discovered I needed to place all start up code in .bashrc, so maybe that has something to do with it. Here's my .bash_logout file: #!/bin/bash # ~/.bash_logout: executed by bash(1) when login shell exits. # when leaving the console clear the screen to increase privacy if [ "$SHLVL" = 1 ]; then history -c cat /dev/null > ~/.bash_history [ -x /usr/bin/clear_console ] && /usr/bin/clear_console -q fi #this does nothing on exit... echo 'logout'; sleep 2s I've tried re-arranging this script many ways, I'm not sure if I don't understand how bash works, and if any of this is running in the first place. Does the fact that I run Xserver make bash consider Terminal something that isn't a log-out on exit?

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• where Redirect permanent rule need to be add

  - by eli1128

  I want redirect my web site http request to https my web site is https://test my apache is version 2.4 and ssl configration is (ssl.conf) on separate file from httpd.conf and I am not using .htaccess file so where I should append. i have tried on both file but didn't work. Redirect permanent / https://test is that should be on my httpd.conf or ssl.conf or did I miss something else. I prefer to use redirect over rewrite. Rewrite.log 10.10.86.1 - - [05/Apr/2012:15:10:19 --0700] [test/sid#7ce00][rid#277448/initial/redir#1] (2) init rewrite engine with requested uri /error/HTTP_BAD_REQUEST.html.var 10.10.86.1 - - [05/Apr/2012:15:10:19 --0700] [test/sid#7ce00][rid#277448/initial/redir#1] (3) applying pattern '^(.*)$' to uri '/error/HTTP_BAD_REQUEST.html.var' 10.10.86.1 - - [05/Apr/2012:15:10:19 --0700] [test/sid#7ce00][rid#277448/initial/redir#1] (4) RewriteCond: input='off' pattern='!=on' = matched 10.10.86.1 - - [05/Apr/2012:15:10:19 --0700] [test/sid#7ce00][rid#277448/initial/redir#1] (2) rewrite /error/HTTP_BAD_REQUEST.html.var - *ttps://test/error/HTTP_BAD_REQUEST.html.var[QSA,R=301,L] 10.10.86.1 - - [05/Apr/2012:15:10:19 --0700] [test/sid#7ce00][rid#277448/initial /redir#1] (2) implicitly forcing redirect (rc=302) with *ttps://test/error/HTTP_BAD_REQUEST.html.var[QSA,R=301,L] 10.10.86.1 - - [05/Apr/2012:15:10:19 --0700] [test/sid#7ce00][rid#277448/initial/redir#1] (1) escaping *ttps://test/error/HTTP_BAD_REQUEST.html.var[QSA,R=301,L] for redirect 10.10.86.1 - - [05/Apr/2012:15:10:19 --0700] [test/sid#7ce00][rid#277448/initial/redir#1] (1) redirect to *ttps://test/error/HTTP_BAD_REQUEST.html.var%5bQSA,R=301,L%5d [REDIRECT/302]

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• How and where do you manage your domain names?

  - by Saif Bechan

  In the past several years doing web development I often times needed to buy new domain names. I changed registrars a lot also so over the years I have multiple domain names scattered over different registrars all over the world. Now I want to bring a little structure into my business, and I am at the point that I want to be able to have easy control over my domain names in a convenient way. Does anyone have an idea on what the best way is to give structure on this. I have made some suggestions maybe you can comment on them for me. 1) Just leave it as it is I can leave everything as it is. To make adjustments I have to log into different panels, and for some registrars I have to email the changes. 2) Transfer all the domains to one registar This will cost a lot, about 10 usd per domain name. But if I can find a registar where I have full control over DNS this is worth looking at. Can you give me some comments on how you are doing things now. Maybe also which registrar you prefer on doing things.

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• Apache Proxy Error AH00920 and AH01206

  - by Aptos

  I ran into this problem when trying to enable proxy function on apache http: My httpd.conf LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_connect_module modules/mod_proxy_connect.so LoadModule proxy_ftp_module modules/mod_proxy_ftp.so LoadModule proxy_http_module modules/mod_proxy_http.so LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so LoadModule proxy_scgi_module modules/mod_proxy_scgi.so LoadModule proxy_ajp_module modules/mod_proxy_ajp.so LoadModule proxy_balancer_module modules/mod_proxy_balancer.so <VirtualHost localhost:57173> ServerName localhost <Location /balancer-manager> SetHandler balancer-manager Order Deny,Allow Deny from all Allow from localhost </Location> <Proxy balancer://mycluster> BalancerMember http://localhost:9999 BalancerMember http://localhost:9998 status=+H </Proxy> <Proxy *> Order Allow,Deny Allow From All </Proxy> ProxyPreserveHost On ProxyPass /balancer-manager ! ProxyPass / balancer://mycluster/ ProxyPassReverse / http://localhost:9999/ ProxyPassReverse / http://localhost:9998/ </VirtualHost> When I check the log: [Sat Oct 27 00:16:24.506220 2012] [proxy:crit] [pid 3153] (13)Permission denied: AH00920: Failed to reopen mutex balancer://mycluster in child [Sat Oct 27 00:16:24.506407 2012] [proxy_balancer:crit] [pid 3152] (13)Permission denied: AH01206: Failed to init balancer balancer://mycluster in child Can someone please help me :( I tri googling it but there was no answer for this problem. Thank you very much

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• Sudo won't execute command as another user

  - by TOdorus

  I'm trying to get a unicorn server to start when the server boots. I've created a shell script which works if I log as the ubuntu user and run /etc/init.d/unicorn start Shell script #!/bin/sh case "$1" in start) cd /home/ubuntu/projects/asbest/current/ unicorn_rails -c /home/ubuntu/projects/asbest/current/config/unicorn.rb -D -E production ;; stop) if ps aux | awk '{print $2 }' | grep `cat ~/projects/asbest/current/tmp/pids/unicorn.pid`> /dev/null; then kill `cat ~/projects/asbest/current/tmp/pids/uni$ ;; restart) $0 stop $0 start ;; esac When I rebooted the server I noticed that the unicorn server wasn't listening to a socket. Since I ran the code succesfully as the ubuntu user I modified the script to let it always use the ubuntu user via sudo. #!/bin/sh case "$1" in start) cd /home/ubuntu/projects/asbest/current/ sudo -u ubuntu unicorn_rails -c /home/ubuntu/projects/asbest/current/config/unicorn.rb -D -E production ;; stop) if ps aux | awk '{print $2 }' | grep `cat ~/projects/asbest/current/tmp/pids/unicorn.pid`> /dev/null; then sudo -u ubuntu kill `cat ~/projects/asbest/current/tmp/pids/uni$ ;; restart) $0 stop $0 start ;; esac After rebooting unicorn still wouldn't start, so I tried running the script from the command line. Now I get the following error sudo: unicorn_rails: command not found I've searched high and low to what could cause this, but I'm afraid I've tapped my limited understanding of Linux. From what I can understand is that although sudo should use the ubuntu user to execute the commands, it still uses the environment of the root user, which isn't configured to run ruby or unicorn. Does anybody have any experience with this?

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• Mysql start fails with Operating System error 13

  - by curious

  I have XAMPP on my Ubuntu Lucid system and everything worked fine. But there seems to be some problem now and mysql wouldn't start. I had tried to recover a few Drupal databases and hence copied the raw files to /opt/lampp/var/mysql folder like all other database folders. And, I guess that could have caused the problem. I am pasting the last few lines of the error log. Someone please help me out. 100814 15:17:47 mysqld_safe Starting mysqld daemon with databases from /opt/lampp/var/mysql 100814 15:17:47 [Note] Plugin 'FEDERATED' is disabled. 100814 15:17:47 [ERROR] Can't open shared library 'libpbxt.so' (errno: 0 API version for STORAGE ENGINE plugin is too different) 100814 15:17:47 [Warning] Couldn't load plugin named 'PBXT' with soname 'libpbxt.so'. 100814 15:17:48 InnoDB: Operating system error number 13 in a file operation. InnoDB: The error means mysqld does not have the access rights to InnoDB: the directory. InnoDB: File name /opt/lampp/var/mysql/ibdata1 InnoDB: File operation call: 'open'. InnoDB: Cannot continue operation.

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• Config nginx for slow connection to avoide corrupted doanlowds

  - by user1850273

  We have a Windows 2003 server that nginx 1.3.8 is running. Our problem is users with slow connction about 10K . Our server is serving our program update files and when they download from our server the downloade file is incompleted or crrupted. (Users can not download file with DL manager and the problem is in IE ) for example in slow connection a file with 25mb , after 2Mb downloaded finish . in high speed connections there is no problem. Also when we redirect these slow connection to other port F.e 50005 with the same config they download will be much better but not good as other servers. Which config we must apply to avoide such these download stops or corrupted downloads in slow connection ? this is our server config : worker_processes 1; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; log_format main '$remote_addr - $remote_user [$time_local] "$request" ' '$status $body_bytes_sent ' '"$http_user_agent"'; access_log logs/access.log main; sendfile off; keepalive_timeout 60; server { listen 80; server_name localhost; location / { root html; deny 127.0.0.3; index index.html index.htm; } } server_tokens off; } Our server use Htaccess password accounting and we can not use IIS on windows , Which soloution you think is better ? IIS with a extention to use apache htaccess ? Or use apache for windows insted of nginx ? Thank You.

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• Apache LocationMatch does not work for group

  - by dma_k

  I would like to configure Apache to proxy mldonkey running at localhost. Initially I have used the following configuration: <IfModule mod_proxy.c> <LocationMatch /(mldonkey|bittorrent)/> ProxyPass http://localhost:4080/ ProxyPassReverse http://localhost:4080/ </LocationMatch> </IfModule> and it didn't worked! error.log reads [error] [client 192.168.1.1] File does not exist: /var/www/mldonkey which means that Apache does not intersect the URL. However, when I change the regexp to following: <LocationMatch /mldonkey/> it started to work (i.e. mod_proxy functions OK, more over all ). I have tried the following alternatives: <LocationMatch ^/(mldonkey|bittorrent)/> <LocationMatch ^/(mldonkey|bittorrent)/.*> <LocationMatch ^/(mldonkey|bittorrent)> <LocationMatch /(mldonkey|bittorrent)> <LocationMatch "^/(mldonkey|bittorrent)/"> <LocationMatch "/(mldonkey|bittorrent)"> <LocationMatch "/(mldonkey)"> <LocationMatch "/(mldonkey)/"> with no positive result. I am stuck. Please give me a hint where to look at. P.S. Apache Server 2.2.19. P.P.S. Would be happy if <LocationMatch> would work, without using the heavy artillery of mod_rewrite.

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• environment variables generated by at command

  - by Jordan Arseno

  I'm inspecting /var/spool/cron/atjobs/a001cf01570e44 with cat, after running the at command from PHP using exec(). It looks like at has prepended the script with lots of APACHE environment variables. #!/bin/sh # atrun uid=33 gid=33 # mail www-data 0 umask 22 APACHE_RUN_DIR=/var/run/apache2; export APACHE_RUN_DIR APACHE_PID_FILE=/var/run/apache2.pid; export APACHE_PID_FILE PATH=/usr/local/bin:/usr/bin:/bin; export PATH APACHE_LOCK_DIR=/var/lock/apache2; export APACHE_LOCK_DIR LANG=C; export LANG APACHE_RUN_USER=www-data; export APACHE_RUN_USER APACHE_RUN_GROUP=www-data; export APACHE_RUN_GROUP APACHE_LOG_DIR=/var/log/apache2; export APACHE_LOG_DIR PWD=/home/jordanarseno/webroot/public_html/myapp; export PWD cd /home/jordanarseno/webroot/public\_html/myapp || { echo 'Execution directory inaccessible' >&2 exit 1 } curl -k http://localhost/myapp/crons/this_action/3 The last line is the only real command I sent along with at via stdin. What is the purpose of these variables? Where is this procedure stored?

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• Noob with git repository on Windows Storage Server 2008?

  - by HibbyHoo

  I have a Western Digital Sentinel at home running Windows Storage Server 2008 R2 Essentials. I have several git repositories on it for my own personal projects, and have no problem pushing and pulling over my local network. I want to be able to access those repos remotely from anywhere. I am able to log in and remotely access folders and files on it, but I cannot clone repos using the same address. It hangs for a REALLY long time before finally failing with an error: git.exe clone --progress -v "https://myIpAddressHere/Remote/fs/files.aspx?path=%5C%5Cmydevicename%5Cmyreposfolder%5Cmyrepo.git" "D:\repo" Cloning into 'D:\repo'... error: Failed connect to myIpAddress:443; No error while accessing https://myIpAddress/Remote/fs/files.aspx?path=%5C%5Cmydevicename%5Cmyreposfolder%5Cmyrepo.git/info/refs fatal: HTTP request failed git did not exit cleanly (exit code 128) I'm not too privy to networking or web development, and I have only a rudimentary understanding of how to use git (with TortoiseGit). I'm having a hard time finding search results for this specific problem and a hard time interpreting generic tutorials for the general scope of this problem. TortoiseGit version: 1.7.13.0. git version: 1.7.10.mysysgit.1.

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• No access to Windows 2003 admin shares

  - by ARomo

  This is the environment: Several Win 2003 SP 2 servers and several Win XP SP2 & SP3 clients. All in the same LAN. Firewall is disabled everywhere. No recent Windows updates or configuration changes. This is the problem: Since last Thursday, I log on to any other server or workstation as any regular (non-admin) user and I fail to be able to open ADMIN SHARES ONLY (namely \\server1\c$, \\server1\e$ and \\server1\admin$). The error message is: "\server1\c$ is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again." I can, however, open the same shares if I use FQDN or IP address: \\server1.domain.local\c$ \\172.0.0.1\c$ Other shares do not have this issue and I can open them without any issue. Any ideas or suggestion would be truly appreciated. Thank you in advance.

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• Can’t connect to SQL Server 2008 - looks like Shared Memory problem

  - by Proposition Joe

  I am unable to connect to my local instance of SQL Server 2008 Express using SQL Server Management Studio. I believe the problem is related to a change I made to the connection protocols. Before the error occurred, I had Shared Memory enabled and Named Pipes and TCP/IP disabled. I then enabled both Named Pipes and TCP/IP, and this is when I started experiencing the problem. When I try to connect to the server with SSMS (with either my SQL server sysadmin login or with windows authentication), I get the following error message: A connection was successfully established with the server, but then an error occurred during the login process. (provider: Named Pipes Provider, error: 0 - No process is on the other end of the pipe.) (Microsoft SQL Server, Error: 233) Why is it returning a Named Pipes error? Why would it not just use Shared Memory, as this has a higher priority order in the list of connection protocols? It seems like it is not listening on Shared Memory for some reason? When I set Named Pipes to enabled and try to connect, I get the same error message. My windows account is does not have administrator priviliges on my computer - perhaps this is making a difference in some way (as some of the discussions in this post about an "SuperSocketNetLib\Lpc" registry key seems to suggest). I have tried restarting the SQL Server service, by the way, and also tried to get someone to log onto the machine with an admin account to restart the SQL Server service. Still no luck.

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• Microsoft Word 2008 on the Mac sometimes "Disappears" documents, really.

  - by Ross Charette

  This happens in a computer lab environment, has happened at least 3 times. We are running Microsoft Office 2008 for mac on Leopard, everything is updated. Our user's home directories are on a network drive, but the /Library/Cache folder is running locally. Typically a student will have a Word file that they have been working on, it's been saved before they even logged onto the computer that day. They log on, open the document, click the save icon (not go to File Save), sometimes even save multiple times, then close Word. The document is now gone. It's not hidden, there are no autosaves or anything in the Cache folder. Definitely not in the trash or trashes folder. It can't find it when you click on it in 'recent documents'. Searching meticulously though every folder in their home drive turns up nothing. They look using Finder, I look ssh'd as root into their home using ls -la. I look for similar files in case they renamed it by mistake. It's gone. Disappeared. Vaporized. It's happened to at least 3 different users in the past year. Much whining. Any idea?

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• How to fix "The connection was restarted"?

  - by Altar

  I have a php script with ajax. Few days ago, without making any changes, the script stopped working. The script is working sometimes but it is very slow. Other times it doesn't load completely. Yet other times it loads and empty page or it shows a "The connection was restarted" message. We have tried loading the page from 4 different computers in two different countries (two different ISPs). There is nothing relevant in the server's log. We contacted iPage.com hosting support. We sent screenshots. And all we manage to get from them was an incomplete screenshot and the message 'We tested. The page loads'. So, they won't admit the fault. It looks like they loaded the page once and declared it is working and went back to playing solitaire. I know their support. We had all kind of problems with iPage hosting. My questions are: 1. There is any way to make this error more easy to reproduce? I mean instead of fixing the error to get it appear more often. 2. There is any way to test a server response, to see if it drops connections?

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• IIS Web Farm Framework servers are automatically set to "unavailable" even when they are healthy... And they never return to the available state!

  - by JohannesH

  I have 2 web farm configurations, one with 2 member servers and one with 3 member servers. I have health monitoring set up on both farms and the monitoring tool reports all servers as being healthy. However after a while all the servers are marked as being "Unavailable" and "Healthy" in the "Monitoring and Management" screen (in the "Servers" screen they are all listed with "Yes" in the "Ready for Load Balancing" column). Viewing the event log on both the web farm controller or any of farm servers doesn't reveal anything interesting. there are no warnings or errors in the period where the servers became unavailable. There are a couple of informational events about the worker process getting shut down due to inactivity but I don't hope this is the cause since that would mean that the farms will die during the night when the load is low. Am I missing something? EDIT: Btw, I think its very odd that the application pool shuts down on the servers since the health monitoring system is polling an aspx page on each server. Shouldn't that keep them going? EDIT2: Now I've also experienced this problem with the RTW version of Web Farm Framework 2.

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• Removed Old Domain Trust. Now Progress (9.1D) can't open DB File

  - by RLH

  My company has an old server, running Progress 9.1D on a Windows 2000 VM, which was used by our company OS (Vantage 6 by Epicor.) Vantage was our primary OS for a very long time. About 2 years ago, we migrated to a larger, corporate OS and we cancelled our service contract with Epicor. Yesterday, we removed an AD trust between the corporate domain and our old AD domain we used in the days of Vantage. After restarting the virtual server, I have been able to start the ProService for 9.1D Windows service, however, I can not get Vantage to start back up. When I run the application, I get the error in the message listed below. Transcript: ** Could not connect to server for database [progress db file], errno 0. (1432) How can I fix this? FYI, I haven't had to work with Progress in years and even then I wouldn't have considered myself a "novice"-- I'm even less knowledgeable than that title would suggest. Vantage had a lot of internal tools and I recall that Epicor support managed to prevent .pf scripts from being executed. If there was a Progress specific patch that needed to be applied, you had to do it within the Vantage software OR they had to remote into the machine to fix this. I may not be able to run a .pf script but I do know that I can log into the console-based server application. (Yes, I can't even recall which utility that was called. It is sad.) It's been a long time and I never had to digg into Progress that much. Please help and feel free to ask questions. If you need more info, I'll update this post.

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• nginx root directory not forwarding correctly

  - by user66700

  The server files are store in /var/www/ Everything was working perfectly, then I've been getting the following errors 2011/01/28 17:20:05 [error] 15415#0: *1117703 "/var/www/https:/secure.domain.com/index.html" is not found (2: No such file or directory), client: 119.110.28.211, server: secure.domain.com, request: "HEAD /https://secure.domain.com/ HTTP/1.1", host: "secure.domain.com" Heres my config: server { server_name secure.domain.com; listen 443; listen [::]:443 default ipv6only=on; gzip on; gzip_comp_level 1; gzip_types text/plain text/html text/css application/x-javascript text/xml text/javascript; error_log logs/ssl.error.log; gzip_static on; gzip_http_version 1.1; gzip_proxied any; gzip_disable "msie6"; gzip_vary on; ssl on; ssl_ciphers RC4:ALL:-LOW:-EXPORT:!ADH:!MD5; keepalive_timeout 0; ssl_certificate /root/server.pem; ssl_certificate_key /root/ssl.key; location / { root /var/www; index index.html index.htm index.php; } }

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• Does Xenapp require Windows Terminal Services (Remote Desktop) licenses?

  - by John Virgolino

  We have a Xenapp 5.x server running for over a year now. It does not have any purchased Terminal Services (Remote Desktop) licenses installed. It is running on a Windows 2008 Server box. I am aware that Terminal Services runs fine for about 3 months and then supposedly stops issuing licenses. On occasion, Xenapp stops working and we see lots of License errors in the event log, although not necessarily every time. In most cases, a reboot or 2 resolves the problem. We figured it was because of the lack of TS licenses. I spoke with Citrix and they said we had to have the licenses, but it begs the question that if we have to have the licenses, how does it work the majority of the time without them!!?? I have not received a straight answer yet and before I tell my client to shell out more money, I need to understand the technical reasoning for how this is actually working if we are breaking the rules here. We will buy the licenses if necessary, but there has to be an explanation for this. I am hoping the community can help where Citrix apparently cannot. Thanks much!

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• Using Openfire for distributed XMPP-based video-chat

  - by Yitzhak

  I have been tasked with setting up a distributed video-chat system built on XMPP. Currently my setup looks like this: Openfire (XMPP server) + JingleNodes plugin for video chat OpenLDAP (LDAP server) for storing user information and allowing directory queries Kerberos server for authentication and passwords In testing with one set of machines (i.e. only three), everything works as expected: I can log in to Openfire and it looks up the user information in the OpenLDAP database, which in turn authenticates my user with Kerberos. Now, I want to have several clusters, so that there is a cluster on each continent. A typical cluster will probably contain 2-5 servers. Users logging in will be directed to the closest cluster based on geographical location. Something that concerns me particularly is the dynamic maintenance of contact lists. If a user is using a machine in Asia, for example, how would contact lists be updated around the world to reflect the current server he is using? How would that work with LDAP? Specific questions: How do I direct users based on geographical location? What is the best architecture for a cluster? -- would all traffic need to come into a load-balancer on each one, for example? How do I manage the update of contact lists across all these servers? In general, how do I go about setting this up? What are the pitfalls in doing this? I am inexperienced in this area, so any advice and suggestions would be appreciated.

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• Random HTTP 413 error on apach2/php/joomla site

  - by jfab

  I have a Joomla site, and every once in a while when I submit something via a form, I get a HTTP 413 error: Request Entity Too Large The requested resource /index.php does not allow request data with POST requests, or the amount of data provided in the request exceeds the capacity limit. In the error.log file I get: Invalid Content-Length, referer: [site]/index.php It doesn't seem this has anything to do with the actual size of the request, for the following reasons: a) I tinkered with the configuration of both Apache, and PHP. In Apache I tried increasing LimitRequestBody, and in PHP post_max_size, max_input_vars, memory_limit, and even upload_max_filesize. Every value is far beyond what is sent in a typical request that generates an error. b) The error pops up quite randomly, and often just hitting refresh allows me to get through. c) I checked the request in Fiddler to make sure everything is right with the content-length stated in the header, and the content of the request itself. Everything appears to be in order. A curious thing is that when I resent the exact same request via Fiddler, I never got the error. It seems I can only recreate it through a browser. So I'm at my wit's end here. I don't even know where to look for the problem anymore. I don't know if it's Apache or PHP (though I can't find anything in PHP error logs, so maybe that means Apache is the more likely culprit?), or PHP in general, or my Joomla site in particular (my bets were on Joomla until a recreated the error on a test script, with a very basic post form, though it does pop up much more often on the Joomla site). If anyone can give any advice on where to even begin with this, I'll be very grateful!

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• Should I completely turn off swap for linux webserver?

  - by Poma

  Recently my friend told me that it is a good idea to turn off swap on linux webservers with enough memory. My server has 12 GB and currently uses 4GB (not counting cache and buffers) under peak load. His argument was that in a normal situation server will never use all of its RAM so the only way it can encounter OutOfMemory situation is due to some bug/ddos/etc. So in case swap is turned off system will run out of memory that will eventually crash the program hogging memory (most likely the web server process) and probably some other processes. In case swap is turned on it will eat both RAM and swap and eventually will result in the same crash, but before that it will offload crucial processes like sshd to swap and start to do a lot of swap operations resulting in major slowdown. This way when under ddos system may go into a completely unusable condition due to huge lags and I probably will not be unable to log in and kill webserver process or deny all incoming traffic (all but ssh). Is this right? Am I missing something (like the fact that swap partition is very useful in some way even if I have enough RAM)? Should I turn it off?

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• SSH with public/private key to iMac fails.

  - by bennedich

  I'm trying to connect to my iMac (server) from my macbook (client) on my LAN. Both have Mac OS X 10.6.4. Server running on a new clean install of the OS. When just activating Remote Login in System Preferences everything works fine. But when setting up ssh to only work with public/private key I get the following error messages from the server log depending on if I use a rsa passphrase or not: With passphrase (case 1): PAM: user account has expired for <myServerUserName> from 192.168.X.X via 192.168.X.Y Without passphrase (case 2): Failed publickey for <myServerUserName> from 192.168.X.X port AAAAA ssh2 This is my setup algorithm: Create a private and public key on client with command ssh-keygen -t rsa. In case 1 I also set a passphrase. Move the id_rsa.pub to the server path /Users/<myServerUserName>/.ssh/ In this folder I execute cat id_rsa.pub > authorized_keys Making sure Remote Login isn't active, I now execute sudo /usr/sbin/sshd -d on the server. Back on the client I now type ssh -v -v -v <myServerUserName>@192.168.X.Y and get prompted to accept RSA key fingerprint. This is NOT the same fingerprint as the one from when I created the private/public key (should it be?). I accept. Depending on case: CASE 1: Client gets halted for password and the response is permission denied even though correct password is given. Back on the server I can read the error message I stated above for case 1: PAM: user account has expired... CASE 2: Client gets message Connection closed by 192.168.X.Y. Back on the server I can read the error message I stated above for case 2: Failed publickey... What could possibly cause this?

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• Remote Desktop svchost (networkservice) & lsa.exe high cpu usage, hangs on welcome screen

  - by Rohan1

  We have deployed an RDS Farm with 12 virtual RDS servers using Hyper V. Currently some users are not able to log on. After passing credentials to the connection broker, the session hangs on the "Welcome" screen. Using resource monitor we've seen that svchost (with the "networkservice" service) has a CPU usage of 50%, when viewing the wait chain on the process it displays that it's waiting for a lsa.exe to finish. We can't kill any of the users processes, even when trying with taskkill /f. Suspending lsa.exe did work but didn't have any effect. The networkservice also couldn't be restarted. Also, if this happens, the current users logged on to the RDS server can't be displayed. Task manager crashes when viewing the users, RDS service manager crashes when viewing the users (even remotely) and the cmd command "query session" doesn't work. No antivirus is installed on the RDS server. The only thing we can do is rebooting the server, which is not an option because of the fact that other users are in active sessions. Does anyone have ANY idea what's going on? We didn't encounter this in our pre-production setup.

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