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Articles indexed Thursday August 30 2012

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• Soap client call has slow performance

  - by Alon_A

  OS is Centos 6.2 with PHP 5.3.15. We have a Facebook application that is using PHP soap web services. We sometimes experince slow preformance when connecting to these services, but we cant understand what exacly is causing the problem. We've try to analyse the behavior using the profiling tool Kcachgrind. Here is a call graph from the index.php page that took 21 seconds to load. You can clearly see that calling the soap client is the bottle neck. I've also noticed that exactly before the page finishes to load, this file is being created in our serve's /tmp folder: wsdl-apache-d1032d85dfd16c0d91a6b70facc70e43 These are the permission of /tmp drwxrwxrwt 6 root root 40960 Aug 30 10:39 tmp I know its not the most specific question, but if any one had similar performance issues with soap client, We would love some ideas about what can cause this kind of performance problem, what can we do to investigate more accurately or how to overcome the problem ? Thanks.

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• Which software could I use to setup a 4in6 IP tunnel (RFC 2473) on GNU/Linux

  - by Mildred

  Here is my problem. I have a server A that has two IP addresses. One public IPv4 and one IPv6. Server B has only one IPv6 address. I want to host most of my services on server B (because I have more disk space on it, I can control it better) but I need the IPv4 of the server A. I would like to set up a 4in6 tunnel (RFC 2473) between A and B so that I can transfer the traffic from the IPv4 address in A to B. If needed, I can request another IPv4 address on the server A, but I'd prefer not to. My question is: which software use to do the 4in6 tunnelling? I suppose OpenVPN can do the thing, but is there any implementation of the 4in6 protocol on Linux? A little more challenging: the IPv4 address comes from a venet interface, which cannot be bridged. How could I transfer ownership of this address I don't use on server A to the server B? Thank you

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• Does kern.hz still have any relevance in FreeBSD if "dynamic tick mode" is enabled?

  - by Frerich Raabe

  I'm running a FreeBSD 9.0 setup as a virtual machine in a KVM setup. In previous versions of FreeBSD it was common to force the kern.hz setting to a lower value so that the virtual machine does not keep the host busy because it's handling timer interrupts without having any work to do - the FreeBSD Handbook explains: The most important step is to reduce the kern.hz tunable to reduce the CPU utilization of FreeBSD under the Parallels environment. This is accomplished by adding the following line to /boot/loader.conf: kern.hz=100 Without this setting, an idle FreeBSD Parallels guest OS will use roughly 15% of the CPU of a single processor iMac®. After this change the usage will be closer to a mere 5%. However, in FreeBSD 9, the "dynamic tick mode" (aka "tickless mode") is the default, controlled by the kern.eventtimer.periodic setting which defaults to 0 (read: tickless mode). This makes me wonder - does the tip of lowering kern.hz still have any relevance for making FreeBSD 9 play nicely in a virtual machine setup?

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• Squid free domain prompt authentication

  - by Tobia

  i have a squid proxy, i would like to leave free access (without proxy login prompt) to some domains and request a user login for all other domains. I tried this configuration: http_access allow allowDomains http_access deny !loggedUser where allowDomains is an acl with all free-domains, and loggedUsers is the user authentication acl. With this configuration i can access free domains also with an empty login, but what i would like to do is to not ask authentication at all (no prompt)... how can i do? Thanks.

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• Apache has no rights to unzip file uploaded by DirectAdmin created FTP user

  - by FlyOn

  I know similar things have been asked a thousandfold, but I can't seem to figure it out.. I have recently started renting a VPS. It runs DirectAdmin. I created a reseller account in the admin account, and created a new user (with FTP account) with the reseller account. I logged in with FTP as the created user and uploaded a zip file and a php file which will extract the zip. But when running the script in the browser I get "Permission denied" errors however. Probably because Apache is not in the same group as the users FTP account. Now my question is: How can I solve this once and for all, so that I don't have to do it again for every new user account I create through DirectAdmin?

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• Configure tomcat behind loadbalancer to respond on HTTP and HTTPS

  - by user253530

  I have 2 tomcat machines behind a load balancer on Amazon EC2. Until now The load balancer was configured to respond only on https. So in order to access our services you would go to https://url. Tomcat was configured to listen on 8080 but the connector had additional params that would tell tomcat that it is behind a proxy and that it should respond on HTTPS 443. The connector looks like this: <Connector scheme="https" secure="true" proxyPort="443" proxyHost="my.domain.name" port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" useBodyEncodingForURI="true" URIEncoding="UTF-8" /> What i would like to do is to open port 80 on the load balancer and basically allow traffic on HTTP and HTTPS. I've configured the load balancer to redirect all HTTP traffic to the tomcat machines on port 8088. I was thinking that i could define a new connector so that all HTTPS traffic goes to 8080 and HTTP to 8088. Unfortunately i did not succeed. Here is my connector <Connector port="8088" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" useBodyEncodingForURI="true" URIEncoding="UTF-8" /> Am I missing something? Thanks

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• Apache2 - 500 internal server error

  - by Lucio Coire Galibone

  i'm running a VPS with Linux CentOs 6 with 4 GB of RAM, 10 GB of HD and 2 virtual CPU Intel(R) Xeon(R)CPU L5640 @ 2.27GHz. As my host says each virtual CPU must be at least 0.5 physical cpu. At certain times of the day, those with more traffic, trying accessing my php script i receive intermittently "500 internal server error". I activate logging to debug level from apache, and also the PHP logging with E_ALL, but I can't find reference to Error 500 in any logs(I checked the right logs!). I haven't got any .htaccess file in path script. The strange thing is that the error start at first php line in the script (the previous html displays correctly, but at the first php line the script send 500 error). The cpu load is always good (max 0.15 0.08 0.01) and RAM is close to 95% but it arrived to swap just 2 times in a month with 2-5 MB. Apache works with prefork with this values: <IfModule prefork.c> StartServers 8 MinSpareServers 5 MaxSpareServers 20 ServerLimit 280 MaxClients 280 MaxRequestsPerChild 4000 </IfModule> Everthing works correctly and I don't get any error in quiet times, but i start receive errors when traffic rises (6-9000 visits per hour). Can i solve the problem increasing resources? (i can upgrade RAM up to 16 GB). It can depend from reaching MaxClients (but apache must write it on log, right?)? If I upgrade RAM to 6 or 8 GB i have to calculate MaxClients value with this? MaxClients = Total RAM dedicated to the web server / Max child process size Max child process size is around 20M. How else can the problem be? Thanks in advance

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• How to automate kinit process to obtain TGT for Kerberos?

  - by tore-

  I'm currently writing a puppet module to automate the process of joining RHEL servers to an AD domain, with support for Kerberos. Currently I have problems with automatically obtain and cache Kerberos ticket-granting ticket via 'kinit'. If this were to be done manually, I would do this: kinit [email protected] This prompts for the AD user password, hence there is a problem with automate this. How can i automate this? I've found some posts mentioning using kadmin to create a database with the ad users password in it, but I've had no luck. Thanks for input

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• Grant HTTP access based on unix user group

  - by Sander Marechal

  Is it possible to grant network access or HTTP access based on a user's group? At my company we want to set up an internal composer server using Satis to manage packages for the projects we write (e.g. on repository.mycompany.com), with the packages themselves in our SVN server (svn.mycompany.com). We have several webservers with many different users on them. Some users should be able to reach the composer and SVN server. Some should not. Users that should be able to reach these servers all belong to the same group. How can I set up Apache on the Composer and SVN server to only grant access to those users in that group? Alternatively, can I set up the webservers in such a way that only users from that group are able to make a connection to our Composer and SVN servers? The best thing we have come up with so far is using SSL client certificates. We simply place a client certificate on all servers which can be used to access Composer and SVN. Only the right usergroup will have read access to the certificate. A bit clunky but it may work. But I'm looking for something better.

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• setting up rhel 5.x RPM build server for mortal users

  - by Chen Levy

  My task is to setup a RHEL 5.x build host, that can build RPMs for mortal users. On RHEL 6.x with rpm version 4.8, I have in /usr/lib/macros: # Path to top of build area. %_topdir %{getenv:HOME}/rpmbuild On RHEL 5.x with rpm version 4.4, the %{getevn:HOME} is not available. I know that I can use /home/someuser/.rpmmacros: %_topdir /home/someuser/rpmbuild and this will work for that user, however I don't want to do this for every user separately. Moreover, since .rpmmacro will not expand ${HOME} or ~ I suspect it is unsafe to use those. This in turn make /etc/skel unstable for this task (or so I suspect). So in short, my question is: How to setup RHEL 5.x host that allow all users to build RPM packages in their home directory?

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• Htaccess Redirect with domain attributes

  - by PHP Bugs

  I have to write a redirect rule for the below condition. www.domain.com/custom.aspx?ATTR=VALUE to www.domain.com/custom?ATTR=VALUE How can this be achieved using the .htaccess I have the below set of codes using on the current .htaccess file. Please also suggest where to include your code. <IfModule mod_rewrite.c> Options +FollowSymLinks RewriteEngine on RewriteRule ^api/rest api.php?type=rest [QSA,L] RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}] RewriteCond %{REQUEST_METHOD} ^TRAC[EK] RewriteRule .* - [L,R=405] RewriteCond %{REQUEST_URI} !^/(media|skin|js)/ RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-l RewriteRule .* index.php [L] </IfModule>

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• close ssh sessions

  - by egor7

  I'm using ~/.ssh/config for logging to the internal.local corporate server: Host internal.local ProxyCommand ssh -e none corporate.proxy nc %h %p But after closing session (typing exit), my sshd session on server stays still active (I see it through different connection). Hot do I close session or change my config in the appropriate way, to eleminate hang sessions? First check from the second, root session: ps -fu user_name user_name 861 855 0 16:58:16 pts/3 0:00 -bash user_name 855 854 0 16:58:13 ? 0:00 /usr/lib/ssh/sshd After logging out: user_name 855 854 0 16:58:13 ? 0:00 /usr/lib/ssh/sshd Just after scp files to/from the internal.local a new scp sessions still hangs on the server.

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• Why am I getting a Sharepoint error on a simple "hello world" web page?

  - by Fetchez la vache

  I've been granted admin access to an internal IIS server on which I need to set up a web site. Before doing anything technical I wanted to ensure that I could access the server, but when attempting to access a simple page (that does not refer to Sharepoint) at http://localhost/index.html when logged onto the server directly, I am getting Parser Error Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. Parser Error Message: Could not load file or assembly 'Microsoft.SharePoint' or one of its dependencies. The system cannot find the file specified. Source Error: Line 1: <%@ Assembly Name="Microsoft.SharePoint"%><%@ Application Language="C#" Inherits="Microsoft.SharePoint.ApplicationRuntime.SPHttpApplication" %> Source File: /global.asax Line: 1 Assembly Load Trace: The following information can be helpful to determine why the assembly 'Microsoft.SharePoint' could not be loaded. WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog]. -------------------------------------------------------------------------------- Version Information: Microsoft .NET Framework Version:2.0.50727.5456; ASP.NET Version:2.0.50727.5456 To be quite honest I know zip about Sharepoint, so why am I getting a sharepoint error on a basic "hello world" html page? Cheers :) Update: I've since supposedly uninstalled Sharepoint, but am still getting this error. Any ideas welcome!

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• ts_block.vbs and mac intosh

  - by Eric Le breton

  I am using your excellent ts_blocker, release 20120530, on my server 2008 R2 Enterprise. it works very fine, i use the vbs script, launched with wscript. The only problem is that is does not work for users attempting to connect RDP from a mac intosh. With this machine the distant IP seems to be not recognized when the login fails. The IP is visible when the login is good (event ID 4624) but not when it fails (Audit failure event ID 4625) : then the IP is not to be seen in the event log ! In the "network information" of the event log entry is nothing given. Have you already been told of that and is there something to do ?

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• Problems installing icinga-web

  - by Kungurov

  I'm using Ubuntu 10.04 LTS (64bit, Server), Apache 2.2.14 Following the instruction from the oficial icinga page http://docs.icinga.org/latest/en/index.html I installed the icinga-web-1.7.1 on my machine and configured a few hosts for test purposes. The Classic Interface runs as expected but the new Web Interface does not show any data. When I try: ps aux | grep ido2db | grep -v grep I get: icinga 27425 0.0 0.0 41464 600 ? Ss Jul27 0:00 /usr/local/icinga/bin/ido2db -c /usr/local/icinga/etc/ido2db.cfg which might indicate a problem with idomod/ido2db because according to the docs there should be at least 2 processes greped. Any ideas how to fix that?

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• How to safely backup MySQL using VSS-based backup solutions

  - by Rhyven

  One of my clients is running MySQL on a Windows Server 2008 system. Their regular backups are performed using StorageCraft's ShadowCopy, which uses the VSS service to perform backups of open files. Some investigation indicates that MySQL is not entirely VSS-aware, and that the tables need to be locked prior to the shadow operation, then unlocked afterwards. There is a post at http://forum.storagecraft.com/Community/forums/p/548/2702.aspx which indicates the steps that need to be performed, however the user had some difficulty in performing them and no follow up solution was ever posted. Specifically, they succeeded in writing a batch file to lock the database, however once the batch file returns from MySQL it drops the connection and thus relinquishes the lock. I'm looking for a method that I can send the MySQL command FLUSH TABLES WITH READ LOCK, then perform the backup, then send UNLOCK TABLES when the backup is complete. Alternatively, I can exclude the MySQL data storage folder from backup, and schedule a mysqldump backup into a folder that will then be backed up by VSS. Can I have some recommendations please?

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• Certain running applications cause middle-click in firefox to function differently under windows 7

  - by Charlie

  If I have photoshop, vlc player, or even just the windows task list open, when I middle click in firefox to get it to open in new tab (by depressing both buttons on my Lenovo g550 with alps touchpad), the mouse icon changes to some variety of scroll type feature, middle click doesn't work, and if I persist then the other programs take focus, and some crash. I assume the scroll like feature must be intended as added functionality in either windows 7 or the alps touchpad driver, but no settings adjustments seem to be able to remove this, and I could see nothing regarding this in firefox. I would really like to fix this! Thanks.

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• Possible HDD malfunction. Need help in diagnosing

  - by Protheus

  Today when using my PC as I did for almost 4 years I experienced the following: during opening new tab in Opera browser screen froze. Music (AIMP 3) continued to play for about 5 minutes and then stopped too. I tried Ctrl+Alt+Del, but win7 lock screen didn't appear. Caps\Scroll or Num locks didn't switch diodes on keyboard. I rebooted my PC and saw that BIOS suggests me to enter it's settings or load by default. I chose default. It don't see proper boot device (old faitful "insert proper boot" something). After second reboot it said that there is no ExpressGate installed (which i turned off in BIOS years ago). I went into BIOS setting to turn off ExpressGate and see configs: time was not set off, all hard drives present, temp and O.C. settings are nominal (no O.C.) I've inserted my Win7 install disk to try recovery. It did load awfully long (about few minutes) and didn't see current installation. PC was utilized in 24/7 mode for almost all these years. Hardware configuration: ASUS P5Q WS Core 2 Quad Q9300 (2.5GHz no O.C.) MSI geForce GTX 460 4x2 Gb GeIL EVO 2 (AFAIR) Seagate something 750Gb (4 years as system HDD 24/7) WD 1Tb (for random stuff, 5 y.o.) Hitachi 500Gb (for even more random stuff, 6 y.o.) NEC DVDRW (ALL DISKS ARE SATA) Cooler Master Silent Pro 700W Software: Windows 7 AND Kubuntu on the same drive with GRUB loader. Sorry I can't remember HDDs and can't see them right now, but I think their models aren't relevant anyway. My idea is that due to some system error or hard drive glitch i've wrecked my primary HDD's MBR. Nevertheless I don't exclude the possibility of other failure. May it's be that motherboard or it's SATA controller? Doubt it, because all drives are seen in BIOS and I could load from DVD. Maybe GRUB got bugged somehow, although I don't see how it's possible from Windows. But I did install KUbuntu from Windows (i wasn't myself then), maybe GRUB did write itself in some windows partition and got rewriteen in process? Right now I am at work with my flash drive with me and I need some advice how to fix MBR or to hear if it's not MBR. I'm going to buy new HDD (Hitachi 7k2000) because I think that my current HDD is compromised and it's unsafe to use it as system drive, especially 24/7.

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• Linux Defualt Startup Display PCI to fix black boot screen

  - by Jonathan

  You heard it all before black screen on boot after perfectly fine install of most linux ubnuntu mint etc distributions (the netbook works fine) It has an Intel N10 integrated graphics chipset. I have actually found that if I plug in an external display then remove it the default screen turns on and my laptop works fine drivers all great - I have tried the screen cycle button fn f7 but doesn't work when no display is plugged in. It also works out all the correct resolutions and no modification of the grub bootloader or creating any xorg configs. So I think my monitor is forcing to a display that doesn't exist. Do you know if there is anyway I can force it to choose a different screen at boot so I can get a login screen? I can use nomodeset on grub but xrandr cant add the damned 1024 600 60 resolution that I need! Ideas guys?

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• Linux: cat /dev/video0 TS into some kind of ring puffer

  - by user155384

  I want to cat a /dev/video0 device output (Transport Stream) into a temporary ring buffer. In fact i do not want that the file is growing over the time. Simultaneously access is not possible. So the purpose is to have a file (buffer, Fifo, whatever) to be accessed by more than one consumer (example: tail -f, mencoder, VLC, ....). Some kind of scenario: 1# cat /dev/video0 > mybuffer.ts And then multiple access 2# tail -f mybuffer.ts > extract1.ts 2# tail -f mybuffer.ts > extract2.ts 3# ffmpeg ... Does someone have an idea how to do something like this?

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• Odd behavior of permissions and icons

  - by Urban

  After some virus had infected my Windows 7, I did a complete format and re-installed the OS. I was just installing applications and copying back some data when I noticed some shortcuts changing their icons to something I couldnt recognize (Yellow icons in the image below). Also, a few exe files which previously did not ask for User permission, are now asking for it. Wondering if this is an icon cache problem, I cleared the cache by deleting the IconCache.db in AppData/Local but the problem still persists. Although I did a full system scan with MS Security Essentials, I'm not sure if this is another virus or some other problem. I would appreciate any suggestions you might have. Edit: Now even Firefox needs permissions to launch. It's icon hasnt changed, but it's got the 'shield' overlay on it like the other yellow icons.

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• Howto switch / chage user id witin a bash script to execute commands in the same script?

  - by a1an

  Is there a way to switch user identity within a script (executed as root as part of an installation process) to execute some commands without calling an external sctipt, then be back to root to run other commands? Sort of: #!/bin/bash some commands as root SWITCH_USER_TO user some commands as user including environment variables checks, without calling an external script SWITCH_USER_BACK some other stuff as root, maybe another user id change...

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• Outlook keeps forgetting safe sender domains and ignoring contacts

  - by Jivlain

  I get a large number of quite similar emails from a particular address, most of which Outlook 2010 identifies as spam. None of these are actually spam. I have Outlook's junk email proection set to Low, and have told it to trust email from my contacts. I have added the address to my list of safe senders, and I have also tried adding it to my contacts. However: it keeps dropping the address from my safe senders list - I add it, it stays there for a while, but eventually I'll have a legitimate mail identified as spam, and the address will have been dropped from the list. Meanwhile, despite adding that sender to my contacts, it is still classifying their mail as junk. Any ideas of how to fix this?

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• Creating a new PC, need suggestions on parts [closed]

  - by zilentworld

  I want to build a new PC and went around PC Stores to ask for quotations with only some parts that i want and the rest are filled up by them. Here is the "best" i got Core i5 3550 4gb ram ddr3 (planning to get 8,no brand yet) 500gb hdd (no brand yet) GTX550Ti 1g DDR5 Asus P8H61 ATX Casing Here is what i have from my last PC: Huntkey green power 500w Hyper TX3 Evo I want a dual monitor pc which will be used mostly for gaming,programming and i do a lot of multitasking. Im not planning YET to OC my cpu but i will in the near future. So can i ask for suggestions on what to change on my list? my budget is about 800$ (including 2nd monitor)

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• Whats wrong with my keyboard?

  - by Neifen

  I have a new kind of weird problem with my laptops keyboard. To be precise with the shift key. Lately the both Shift-Keys doesn't just make the letters big, they also took role of the 2 and the 7 on the numpad. So when i push the left shift key (with num lock) it also writes a 7. When I use the left shift key (without num lock), the cursor goes to the begin of the line. When i push the right shift key (with num lock) it writes a 2. When I use the right shift key (without num lock), the cursor goes to the end of the line. I really don't know what I changed on the computer... it's really weird and really annoying

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