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• Router gets disconnected once I terminate my SIP application

  - by TacB0sS

  Hey, Here is an interesting one, I have a SIP VoIP application which is able to register to the PBX server, and I can invite and see the user call on the callee end receiving an Invite, and on the caller end I see the Ringing response... now here is interesting part, if I close my application with out any notification to the server my router disconnects and restart, after a short while (30 - 150 sec). I could fix that if I would complete the ACK BYE process, but I'm just wondering why does my router hangs up? any ideas? My Router is TNN-Siemens SL2-141, thought this might matter Update: this is what I found: SIP ALG allows two or more simultaneous VoIP phone calls made by VoIP clients through this router. which means that if I disable it I would not be able to do the testing I'm trying so badly to do, and since I don't have access to another router, I must handle it with the bug then... I can say that this never happened to me with one user connecting, but then again I didn't have anyone to invite then, I received from the SIP UAS 503 when I tried to invite an imaginary user. This bug only occur after I connected the second SIP UAC and invited it and closed the application. Adam.

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• btrfs: can i create a btrfs file system with data as jbod and metadata mirrored

  - by Yogi

  I am trying to build a home server that will be my NAS/Media server as well a the XBMC front end. I am planning on using Ubuntu with btrfs for the NAS part of it. The current setup consists of 1TB hdd for the OS etc and two 2TB hdd's for data. I plan to have the 2TB hdd's used as JBOD btrfs system in which i can add hdd's as needed later, basically growing the filesystem online. They way I had setup the file system for testing was while installing the OS just have one of the HDD's connected and have btrfs on it mounted as /data. Later on add another hdd to this file system. When the second disk was added btrfs made as RAID 0, with metadata being RAID 1. However, this presents a problem: even if one of the disk fails I loose all my data (mostly media). Also most of the time the server will be running without doing any disk access, i.e. the HDD's can be spun down, when a access request comes in this with the current RAID 0 setup both disks will spin up. in case I manage a JBOD only the disk that has the file needs to be spun up. This should hopefully reduce the MTBF for each disk. So, is there a way in which I can have btrfs setup such that metadata is mirrored but data stays in a JBOD formation? Another question I have is this, I understand that a full drive failure in JBOD will lose data on the drive, but having metadeta mirrored across all drives, will this help the filesytem correct errors that migh creep in (ex bit rot?) and is btrfs capable of doing this.

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• Apache doesn't immediately notice a change in the document root

  - by Tom

  We use capistrano for website deployments and our Apache document root is a symlink to a particular code release. The deployment procedure switches the symlink from the old release to the new release as the final step of the deployment. We are migrating our webservers from real servers running RHEL 5.6 to Amazon EC2 virtual machines running Ubuntu 11.10 and the new servers are suffering from a problem where Apache doesn't immediately notice the change to it's document root when the symlink is switched. It can take a second or so (and I think I've even seen it take a couple of minutes). It's kind of like Apache has cached the physical path of the symlink for some time. Does anyone know some Apache settings I could look at to get it to "scan" for changes to it's served files quicker. Thoughts: I read that the disks on virtual machines are much slower (since they are network attached storage). Perhaps the filesystem cache somehow works differently too? If so, is there anything that can be done? The website runs PHP code. Perhaps there is some PHP config differences between RHEL and Ubuntu? I checked realpath_cache_ttl but both servers have it commented out: e.g. ; Duration of time, in seconds for which to cache realpath information for a given ; file or directory. For systems with rarely changing files, consider increasing this ; value. ; http://www.php.net/manual/en/ini.core.php#ini.realpath-cache-ttl ;realpath_cache_ttl = 120 We do use the APC opcode cache but don't think it's the issue due to experimentation. The PHP code is in different file paths for each deployment and we ensure stat=1. Here is a similar question that is very interesting: 294107 - but doesn't provide an answer for me. One solution would be to reload Apache everytime we modify the document root symlink. I'll do this if we can't find another solution.

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• Dell Studio 17 - turning off suddenly

  - by studiohack

  I have a Dell Studio 17 laptop, a refurbished model almost 2 years old...It is currently running Windows 7 32-bit, Home Premium. Via a clean install, it is a Vista upgrade machine...A while back, a problem started to develop while running Vista that it would suddenly just turn off. No warnings, messages, anything. It was like I had the battery out, then just unplugged it from the wall. Just like that. Over several months of this happening (or more), I've observed several things...First, it only seems to happen when I'm doing memory-intensive things, such as watching a online video full screen or running many applications in the background...Second, I can tell when it is about to "flip" as I've termed it, when the fan starts running...the computer gets really hot in places... Anyways, I'm pretty sure this is a hardware problem, because it still exists, even after a Vista-to-7 Upgrade...Is this true? Hardware vs. software? Is there anything I can do to fix this? Is it just a specific component or what? What do you recommend? Thanks!!

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• DisableCrossAccountCopy not working on some Outlook installs, working on others, both going against Exchange

  - by MikeBaz

  As part of a mail migration project from one Exchange organization to another, we need to be able to prevent users from moving/copying messages between their accounts in each organization. (Yes, users will think this is evil; no, it's not my decision; yes, users will hate us.) Luckily, we thought, Outlook 2010 provides the DisableCrossAccountCopy registry value/policy (cf. http://technet.microsoft.com/en-us/library/ff800883.aspx). (Because you can't do multiple Exchange organizations in a single profile before Outlook 2010, this only matters on Outlook 2010. Yes, I'm ignoring for the sake of this question copy/move to/from the filesystem.) In our test lab, in a test forest with a test Exchange organization, with a second Exchange account added to the profile in either of the "real" Exchange organizations, with the value set to "*", everything works as expected. On a workstation in one of the production domains, however, the setting does not seem to work. We have tried it under HKCU, HKLM, HKCU\Software\Policies, and HKLM\Software\Policies. It simply seems to be ignored. The value was set in the OCT on a test machine, but the OCT (and the ADM/ADMX file) have the wrong type for the value. We have located the value in the registry and removed it everywhere it is found, we think, and put it back in HKCU, but it still isn't taking. At the moment, a clean Outlook install is not an option - even if it was, we at this point would need to know what to do to fix the pushed copy (I didn't push the copy out to thousands of machines, I've just been asked to help clean up the current mess). Thoughts?

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• OS X Client & Ubuntu Server - Best way for client to access files on server?

  - by Camsoft

  I've got a local development web server running Ubuntu. I also have an iMac running OS X 10.6 which I use a client and is my development machine. I'm currently have Samba server installed on my Ubuntu server. I have shares setup for all the website directories. I then use my Mac and Coda to edit the files via their shares. This generally works really well but I noticed that my Mac was writing loads of resource fork ._filename files everywhere. I found out the following about the files: These files are created on volumes that don't natively support full HFS file characteristics (e.g. ufs volumes, Windows fileshares, etc). When a Mac file is copied to such a volume, its data fork is stored under the file's regular name, and the additional HFS information (resource fork, type & creator codes, etc) is stored in a second file (in AppleDouble format), with a name that starts with "._". (These files are, of course, invisible as far as OS-X is concerned, but not to other OS's; this can sometimes be annoying...) Does anyone know of a way of sharing files between a Mac client and a Linux server that is most compantable between the two operation systems? Ideally it needs to support the HFS filesystem so that the resource forks are not created and it also needs to support the permissions between server and client.

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• HTML Redirect issue with Apache2

  - by Vijit Jain

  I am facing an issue with the ProxyPass on my Apache server on Ubuntu. I have configured Apache to deal with Virtual Hosts on my server. There is an application with runs on the server and uses ports 8001 8002. I need to do something like www.example.com/demo/origin to display the contents that I would see when I visit www.example.com:8000. The contents to be displayed are a host of HTML pages. This is the section of the virtual host config that has issues ProxyPass /demo/vader http://www.example.com:8001/ ProxyPassReverse /demo/vader http://www.example:8001/ ProxyPass /demo/skywalker http://www.example.com:8002/ ProxyPassReverse /demo/skywalker http://www.example.com:8002/ Now when I visit example.com/demo/skywalker, I see the first page of port 8002, say the login.html page. The second should have been www.example.com/demo/skywalker/userAction.html, instead the server shows www.example.com:8000/login.html. In the error logs I see something like: [Mon Nov 11 18:01:20 2013] [debug] mod_proxy_http.c(1850): proxy: HTTP: FILE NOT FOUND /htdocs/js/demo.72fbff3c9a97f15a4fff28e19b0de909.min.js I do not have any folder htdocs in the system. This is only an issue while viewing .html pages. Otherwise, no such issue occurs. When I visit localhost:8001 it will show any and all contents without any errors or issues. www.example.com/demo/skywalker displays a separate webpage www.example.com/demo/origin displays a different webpage and www.example.com/demo/vader displays a different webpage. I have also tried to use one more type of combination, <Location /demo/origin/> ProxyPass http://localhost:8000/ ProxyPassReverse http://localhost:8000/ ProxyHTMLURLMap http://localhost:8000/ / </Location> This fails as well. I would greatly appreciate if anyone can help me resolve this issue.

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• How to change mod_rewrite to avoid {REQUEST_FILENAME} in order to get around 255 character URL limit?

  - by Jeremy Reimer

  According to this answer: max length of url 257 characters for mod_rewrite? there is a maximum 255 character hard limit based on the file system for using mod_rewrite. According to the accepted answer, there are two solutions: Change the URL format of your application to a max of 255 characters between each slash. Move the Rewrite rules into the apache virtual host config and remove the REQUEST_FILENAME. I cannot use the first method, so I am trying to figure out the second. I have put the Rewrite rules into the Apache virtual host config as requested. However I cannot figure out how to remove the REQUEST_FILENAME and still have my web application framework (Dragonfly) still work. Here is the portion of the rewrite rules that I moved from .htaccess into the virtual host config file of Apache: RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-l RewriteCond %{REQUEST_FILENAME} !-f [OR] # if don't want Dragonfly to process html files comment # out the line below (you may need to remove the [OR] above too). RewriteCond %{REQUEST_FILENAME} \.(html|nl)$ # Main URL rewriting. RewriteRule (.*) index.cgi?$1 [L,QSA] I've tried removing {REQUEST_FILENAME} and it just breaks the framework in various ways. How do I rewrite this without using {REQUEST_FILENAME}?

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• Squid - Active Directory - permissions based on Nodes rather than Groups

  - by Genboy

  Hi, I have squid running on a gateway machine & I am trying to integrate it with Active Directory for authentication & also for giving different browsing permissions for different users. 1) /usr/lib/squid/ldap_auth -b OU=my,DC=company,DC=com -h ldapserver -f sAMAccountName=%s -D "CN=myadmin,OU=Unrestricted Users,OU=my,DC=company,DC=com" -w mypwd 2) /usr/lib/squid/squid_ldap_group -b "OU=my,DC=company,DC=com" -f "(&(sAMAccountName=%u)(memberOf=cn=%g,cn=users,dc=company,dc=com))" -h ldapserver -D "CN=myadmin,OU=Unrestricted Users,OU=my,DC=company,DC=com" -w zxcv Using the first command above, I am able to authenticate users. Using the second command above, I am able to figure out if a user belongs to a particular active directory group. So I should be able to set ACL's based on groups. However, my customer's AD setup is such that he has users arranged in different Nodes. For eg. He has users setup in the following way cn=usr1,ou=Lev1,ou=Users,ou=my,ou=company,ou=com cn=usr2,ou=Lev2,ou=Users,ou=my,ou=company,ou=com cn=usr3,ou=Lev3,ou=Users,ou=my,ou=company,ou=com etc. So, he wants that I have different permissions based on whether a user belongs to Lev1 or Lev2 or Lev3 nodes. Note that these aren't groups, but nodes. Is there a way to do this with squid? My squid is running on a debian machine.

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• Instabilities with Bridged and bonded interfaces

  - by Henry-Nicolas Tourneur

  I did post yesterday to get a working setup with several bridged interfaces used for virtual machines (KVM/libvirt). One of the bridged interface is just using eth3 as its ports while the second one (public traffic) is using an ethernet bonded interface. That setup is working but not all the time ! I can start a download from a vm, then it will stop and freeze! So I don't know if my bridge parameters are correct, could you check the below config ? iface eth3 inet manual auto bond0 iface bond0 inet manual slaves eth1 eth2 pre-up ip link set bond0 up down ip link set bond0 down auto br0 iface br0 inet static address 10.160.0.7 netmask 255.255.255.128 bridge_ports eth3 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp on auto br0:1 iface br0:1 inet static address 10.160.0.9 netmask 255.255.255.255 auto br0:2 iface br0:2 inet static address 10.160.0.10 netmask 255.255.255.255 auto br1 iface br1 inet static address 217.4.40.242 netmask 255.255.255.240 gateway 217.4.40.241 pre-up /etc/network/firewall start bridge_ports bond0 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp on auto br1:1 iface br1:1 inet static address 217.4.40.252 netmask 255.255.255.255 auto br1:2 iface br1:2 inet static address 217.4.40.253 netmask 255.255.255.255 And yes, it also sometimes speaks about martian on the host: kernel: [249146.055172] martian source 10.160.0.17 from 10.160.0.10, on dev vnet2 kernel: [249146.073122] ll header: ff:ff:ff:ff:ff:ff:54:52:00:76:c3:5c:08:06

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• Windows 7 Not Starting and System Repair Not Loading

  - by Mark

  I have a Dell Inspiron 1545 running Windows 7 When turning on my PC I keep receiving a black screen with the option to use System Repair or Start Normally. Both options lead me to the System Repair background except no matter how long I wait the system restore options never show up. Choosing F8 and running all of the options including safe mode encounters the same result above. I tried to to use 2 system recovery disks 32x and 64x I downloaded and both lead to similiar results. When I choose System Repair running from the disk the System Repair Question asking to select a language pops ups but after this no matter how long I wait no other options appear. Next after restarting and selecting F8 (after hitting f12 and running from CD) I choose 'Run From Safe Mode with Command Prompt' I am able to run all of the options from System Restore with differing results: Startup Repair: Choosing this ends up in system repair indefinitely (left running 12 hrs) System Restore: Does Nothing. PC thinks for a second and then stops. When selecting ShutDown I see an error message stating there are no restore points. System Image Recovery: Service Cannot be started in Safe Mode Windows Memory Diagnostic: Runs test but then leads to system repair background which never loads system repair Command Prompt: chkdsk /r -Cannot Lock Current Drive...write protected. chkdsk /f -Cannot Lock Current Drive...write protected. bootcfg - Cannot open Boot.Ini file bootcfg - Ran all 3 (rebuildBcd, FixMbr and Fixboot) but PC still goes to System Repair background with no repair options popping up upon restart (without recovery CD). I'm on the verge of purchasing a boot utility disk for $50 unless there is anything else short of "take it to a computer shop" that somebody can suggest I try.

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• Dual VGA monitors with Quadro FX 580?

  - by dentrasi

  I have a machine with a Quadro FX 580 card (DVI and two Displayport). Attached to it are two 19" Acer screens, which are both (annoyingly) VGA. The first one works perfectly, with a DVI-VGA adaptor. The second one doesn't work. It's got a VGA cable, which goes into a VGA-DVI converted, which then goes into a DVI-Displayport converter. Initally, I was getting 'Cable Unplugged' on the screen, and it couldn't be seen by Windows or the nVidia control panel. After swapping the VGA-DVI adaptor (which works perfectly on another machine), Windows can now see the monitor. The nVidia panel sees the model and native resolution, but I get a constant 'No Signal' error. Switching to the other Displayport makes no difference. I suspect that the card is seeing a DVI connection plugged into it (nVididaCP shows the monitor as having a DVI connection), and it only sending out a digital signal because of this. Does anyone know of a solution (other than trying to get a Displayport-VGA adaptor), or of a way to force the card to see it as VGA? Thanks, ~Dentrasi

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• charging light on in laptop with battery removed.

  - by Jus12

  I hope this is the right place for this question. I have an LG R310 laptop. Recently the adapter connector started playing up, so I got a second hand replacement adapter of the same rating. The adapter was a cheap type (I know I made a mistake) and faulty.. it made a low buzzing sound when plugged in and not connected to the laptop. It didn't make the noise when connected to the laptop. Foolishly I used this adapter for several weeks. One day the adapter stopped working. The led didnt work and it was not charging. It had also drained the laptop's battery to 0%. I then got an original replacement adapter. Now I can use the laptop on power but the battery does not charge. The charging light does not come on. The interesting thing is that when I remove the battery the charging light comes on and stays on after I insert the battery back (the battery still does not charge). I need to know if the faulty adapter damaged the motherboard or if its just a problem with the battery. I have a multimeter and I prefer not to open the laptop. Thanks in advance.

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• Rack layout for future growth

  - by bleything

  We're getting ready to move to a new colo facility and I'm designing the rack layout. While we have a full rack, we only have 12U worth of hardware right now: 1x 1U switch 7x 1U servers 1x 2U server 1x 2U disk shelf The colo facility requires us to front-mount the switch and use a 1U brush strip, so we'll be using a total of 13U of space. Regarding growth, I'm reasonably sure we'll be adding another 4U in servers, 1-2U of network gear, and 2-4U of storage in the mid-term. Specific questions I'm hoping to get help with: where should I mount the switch? the LEDs are on top... should I group the servers by function with space for adding new machines? as an alternative, should I group servers based on whether they are production or staging? where in the rack should I start? in the middle? at the top? at the bottom? equally spaced? Here's a silly little ASCII diagram of what I'm thinking right now. Please feel free to tear my design apart, I've really no idea what I'm doing :) Any advice is very welcome. edit: to be clear, the colo is providing redundant power with UPS and generator, so that's why there's no power gear in the plan, except for the 0U PDU that I didn't diagram. 42 | -- switch ---------------------- 41 | -- brush strip ----------------- 40 | ~~ reserved for second switch ~~ 39 | ~~ reserved for firewall ~~~~~~~ 38 | 37 | -- admin01 --------------------- 36 | 35 | -- vm01 ------------------------ 34 | -- vm02 ------------------------ 33 | ~~ reserved for vm03 ~~~~~~~~~~~ 32 | ~~ reserved for vm04 ~~~~~~~~~~~ 31 | ~~ reserved for vm05 ~~~~~~~~~~~ 30 | 29 | -- web01 ----------------------- 28 | -- web02 ----------------------- 27 | ~~ reserved for web03 ~~~~~~~~~~ 26 | ~~ reserved for web04 ~~~~~~~~~~ 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | -- db01 ------------------------ 15 | +- disks ----------------------+ 14 | +------------------------------+ 13 | ~~ reserved for more ~~~~~~~~~~~ 12 | ~~ db01 disks ~~~~~~~~~~~~~~~~~~ 11 | 10 | +- db02 -----------------------+ 9 | +------------------------------+ 8 | ~~ reserved for db02 ~~~~~~~~~~~ 7 | ~~ disks ~~~~~~~~~~~~~~~~~~~~~~~ 6 | ~~ reserved for more ~~~~~~~~~~~ 5 | ~~ db02 disks ~~~~~~~~~~~~~~~~~~ 4 | 3 | 2 | 1 |

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• Two instances of Windows Vista on boot up after failed clean install

  - by Dwayne

  I tried to install a clean version of Vista but failed. I ended up with Windows and Windows.old on my C: drive and a dual boot option on boot up. I gave up and booted up the old version and tried to rename the Windows.old to Windows and was asked if I wanted to merge the two folders. I answered yes and all seemed OK until I booted up this morning and was given the choice of two versions of Vista. The first one is the one that failed to installed correctly and the second one is the old version. How can I get rid of the failed installation? I got rid of the bad boot via MSCONFIG. Here is my current situation: several hard drives installed Using C: as my boot drive a much larger drive (H:) for storing most of my files. I found a subfolder in my C:\windows folder named windows. Upon inspection I determined it to be older than the C:\windows folder and therefore it must be the older, working version of the boot. I renamed the C:\windows folder to c:\windows.bad and moved the sub windows to the C: root directory. I also copied it to the h: drive. Now MSCONFIG reports that the copy that is booting is the h: copy. How can I change it back to the C:\ copy and can I delete the C:\windows.bad file set?

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• Intel Rapid Storage Technology (pre-OS) driver installation

  - by Nero theZero

  My desktop machine is built on Gigabyte GA-Z87-UD3H and Gigabyte provides the latest driver for Intel Rapid Storage Technology (IRST), which I installed after installing the OS. Same goes for my Lenovo Thinkpad-T420. And for both machine, checking the controller device under the IDE ATA/ATAPI Controllers section in Device Manager I see the driver has been updated to the latest version. I set the SATA controller to AHCI from BIOS On the desktop machine I have one WD 2TB BLACK & one WD 3TB Green I don’t use RAID, & no chance of using in near future, but according to Intel IRST improves performance in single disk scenario too. Now I have the following questions – What is the actual purpose of IRST (pre-OS install) driver that doesn’t get served with a post-OS driver that I installed? There must be some difference, otherwise there wouldn’t be a pre-OS version of the driver. Right? In the pre-OS procedure (loading the drivers at OS-installation time) after successfully completing the OS installation, do I need that post-OS driver? Because after installing from that one I got a quick launch icon that runs the IRST configuration application. Where do get that after installing the pre-OS driver? As it is “pre-OS”, when I load it at OS-installation time, does it updates anything at BIOS level or anywhere other than HDD? That’s because I’m going to dual boot Windows 7 with Windows 8.1, and after installing Windows 7 when I install Windows 8.1 & load the IRST driver for that, is there any chance of any “overwriting” or OS-incompatibility? In short, is there anything specific to follow while installing the second OS?

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• Windows 2012 Server: Enable .NET 3.5

  - by Meengla

  I have a Windows 2012 Server which needs .NET 3.5 installed. For background info/solutions, please see this: http://sqlblog.com/blogs/sergio_govoni/archive/2013/07/13/how-to-install-netfx3-on-windows-server-2012-required-by-sql-server-2012.aspx I have tried this but it doesn't work for me. Here is what I am trying: Using a Windows 2012 ISO file, 'mount' on the 2012 Server as 'D' drive and then tried both GUI and Command prompt. In case of GUI, I specified the 'alternate source' path to the D drive's 'source/sxs folder but that failed without giving enough info. In case of the command prompt, here is what's happening: dism /online /enable-feature /featurename:NetFx3 /source:d:\sources\sxs I get error: Installed but Parent feature not enabled. So I tried another approached: dism /online /enable-feature /featurename:NetFx3 /all /source:d:\sources\sxs the above command, per http://blogs.technet.com/b/askcore/archive/2012/05/14/windows-8-and-net-framework-3-5.aspx is supposed to enable parent elements; but running this I get error like 'source not found'. Is there some error in my second command? What else I could do? This is Windows 2012 Server Standard edition. Thanks!

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• Configure nginx for multiple node.js apps with own domains

  - by udo

  I have a node webapp up and running with my nginx on debian squeeze. Now I want to add another one with an own domain but when I do so, only the first app is served and even if I go to the second domain I simply get redirected to the first webapp. Hope you see what I did wrong here: example1.conf: upstream example1.com { server 127.0.0.1:3000; } server { listen 80; server_name www.example1.com; rewrite ^/(.*) http://example1.com/$1 permanent; } # the nginx server instance server { listen 80; server_name example1.com; access_log /var/log/nginx/example1.com/access.log; # pass the request to the node.js server with the correct headers and much more can be added, see nginx config options location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header X-NginX-Proxy true; proxy_pass http://example1.com; proxy_redirect off; } } example2.conf: upstream example2.com { server 127.0.0.1:1111; } server { listen 80; server_name www.example2.com; rewrite ^/(.*) http://example2.com/$1 permanent; } # the nginx server instance server { listen 80; server_name example2.com; access_log /var/log/nginx/example2.com/access.log; # pass the request to the node.js server with the correct headers and much more can be added, see nginx config options location / { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header X-NginX-Proxy true; proxy_pass http://example2.com; proxy_redirect off; } } curl simply does this: zazzl:Desktop udo$ curl -I http://example2.com/ HTTP/1.1 301 Moved Permanently Server: nginx/1.2.2 Date: Sat, 04 Aug 2012 13:46:30 GMT Content-Type: text/html Content-Length: 184 Connection: keep-alive Location: http://example1.com/ Thanks :)

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• Problem with wireless networking

  - by Rodnower

  Hello, I have atheros wifi hardware, intell chipset, gigabyte laptop and CentOS 5 installed. Now I try to use wireless network and get problems. First of all I want to say that I have 2 OS on my laptop, and when I load Windows XP I still may to access to the wireless network. First I try to get it on Linux was to make active wlan0 interface in: system - administration - network but I get: Determining IP information for wlan0... failed. Second I try also was unsuccessfully: [root 1 network-scripts]# ifup-wireless Error : unrecognised wireless request "off" This relevant output of iwconfig is: Warning: Driver for device wlan0 recommend version 21 of Wireless Extension, but has been compiled with version 20, therefore some driver features may not be available... wlan0 IEEE 802.11 ESSID:"" Mode:Managed Frequency:2.462 GHz Access Point: Not-Associated Tx-Power=27 dBm Retry min limit:7 RTS thr:off Fragment thr=2352 B Encryption key:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 {output not in the original format} The same things are happen even if I do: modprobe wlan0 (this not get error) Important to say that modprobe not succeed to find ath_pci, tharefor I decide to download latest version of the madwifi driver from http://madwifi-project.org. I extracted this, but when I make this, this is what I get: [root 1 madwifi-0.9.4]# make /bin/sh: line 0: cd: /lib/modules/2.6.18-164.el5/build: No such file or directory Makefile.inc:66: * /lib/modules/2.6.18-164.el5/build is missing, please set KERNELPATH. Stop. I tried to set KERNELPATH, but I think that it was incorrect: [root 1 madwifi-0.9.4]# make KERNELPATH=/lib/modules/2.6.18-164.el5/kernel/ /bin/sh: cc: command not found Makefile.inc:81: * Cannot detect kernel version - please check compiler and KERNELPATH. Stop. Some one have any ideas? Thank you very much for ahead.

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• fail2ban log parsing too slow on Raspberry Pi - options? [migrated]

  - by Gordon Morehouse

  I'm running fail2ban on a Raspberry Pi at 950MHz which I cannot overclock further. The Pi is occasionally subject to SYN floods on particular ports. I've set up iptables to throttle the rate of SYNs on the port of interest; when the throttle limits are exceeded, hosts which send SYNs are dropped into the REJECT chain and the particular SYN packet which exceeded the limit is logged. fail2ban then watches for these logged SYNs and, after seeing a few, temporarily bans the host for a short time (this is a transient issue in the app I'm working with). The problem is that the SYN floods can occasionally reach rates which are too fast for fail2ban to keep up with; I'll see 20-40 log messages per second, and eventually fail2ban falls behind and becomes ineffective. To add insult to injury, it continues consuming a LOT of CPU as it tries to catch up. I have verified that DROP chained packets from hosts already banned by fail2ban are not logged, and thus do not add to its load. What are my options here? I have a few ideas, but no clear path forward. Could I make the log-parse regex "easier" so it takes fewer cycles? Would using iptables --log-prefix to put a token near the start of the log message, and/or otherwise simplifying/altering the fail2ban regex help? Here is the current fail2ban config line containing a regex: failregex = kernel:.*?SRC=(?:::f{4,6}:)?(?P<host>[\w\-.^_]+) DST.*?SYN Is there a faster way for fail2ban to watch for the packets exceeding the limits than parsing kern.log? Could fail2ban be run under PyPy instead of CPython with minimal nonstandard wizardry (the OS is Raspbian 7, so, mostly Debian 7)? Is there something better than fail2ban that I could use to watch for the packets which exceed the SYN limits, and after N exceeds in X seconds, temporarily put the offending IP into the iptables DROP bucket, and take it out when the ban timer expires? Again, I'd vastly prefer a solution that uses as much software available in Debian as possible, though I can build Debian packages in a pinch.

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• Macbook Pro Triple Boot OS X Lion, Windows 7 and Windows 8

  - by Lloyd Sparkes

  MacBook Pro (Summer 2010 Model, Basic Model) I currently have OS X Lion and Windows 7 running side by side on my MacBook Pro. However I have a need to get Windows 8 running as well in this mix (a Virtual Machine is not good enough, I need the performance). I have created a suitably sized parition (80GB) that is recognizable in Boot Camp. However every time I try to boot from the USB stick (that worked to install Windows 8 on my PC) using the latest version of rEFIt, it just boots Windows 7 and not the Windows 8 installer. I cannot start the installation within Windows 7 as it will just install over Windows 7. I'm guessing the Boot Camp emulation is doing something werid to stop the "Press any key to install Windows..." message from appearing (which should happen if the installer detects Windows is already installed (e.g. if you left your install disk in). Is there a way to get around this / force the installer to start? (Note I cannot start the Windows 7 installer either if I wanted to install a second copy of Windows 7 to upgrade to Windows 8)

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• How to get an ARM CPU clock speed in Linux?

  - by MiKy

  I have an ARM-based embedded machine based on S3C2416 board. According to the specifications I have available there should be a 533 MHz ARM9 (ARM926EJ-S according to /proc/cpuinfo), however the software running on it "feels" slow, compared to the same software on my Android phone with a 528MHz ARM CPU. /proc/cpuinfo tells me that BogoMIPS is 266.24. I know that I should not trust BogoMIPS regarding performance ("Bogo" = bogus), however I would like to get a measurement on the actual CPU speed. On x86, I could use the rdtsc instruction to get the time stamp counter, wait a second (sleep(1)), read the counter again to get an approximation on the CPU speed, and according to my experience, this value was close enough to the real CPU speed. How can I find the actual CPU speed of given ARM processor? Update I found this simple Pi calculator, which I compiled both for my Android phone and the ARM board. The results are as follows: S3C2416 # cat /proc/cpuinfo Processor : ARM926EJ-S rev 5 (v5l) BogoMIPS : 266.24 Features : swp half fastmult edsp java ... #./pi_arm 10000 Calculation of PI using FFT and AGM, ver. LG1.1.2-MP1.5.2a.memsave ... 8.50 sec. (real time) Android # cat /proc/cpuinfo Processor : ARMv6-compatible processor rev 2 (v6l) BogoMIPS : 527.56 Features : swp half thumb fastmult edsp java # ./pi_android 10000 Calculation of PI using FFT and AGM, ver. LG1.1.2-MP1.5.2a.memsave ... 5.95 sec. (real time) So it seems that the ARM926EJ-S is slower than my Android phone, but not twice slower as I would expect by the BogoMIPS figures. I am still unsure about the clock speed of the ARM9 CPU.

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• HP Procurve 2610 intervlan routing

  - by user19039

  Can anyone tell me why inter vlan routing is working for all vlans except my newly created vlan 4/ I have an hp procurve 2610. Any help would be appreciated. I have basically this 1 switch with all unmanaged switches attached to the core. We have a second 2610 on port 28 Running configuration: ; J9085A Configuration Editor; Created on release #R.11.25 hostname "Core_HP" interface 22 speed-duplex 100-full exit ip routing snmp-server community "public" Unrestricted vlan 1 name "DEFAULT_VLAN" untagged 1-12,17-22,26-27 ip address 192.168.4.6 255.255.255.0 tagged 25 no untagged 13-16,23-24,28 exit vlan 2 name "WAN" untagged 28 ip address 10.254.254.3 255.255.255.0 exit vlan 3 name "Wireless" untagged 13-16,24 ip address 192.168.7.6 255.255.255.0 ip helper-address 192.168.4.2 tagged 27 exit vlan 35 name "guest" untagged 23 tagged 24 exit vlan 4 name "esxi" untagged 25 ip address 10.10.1.1 255.255.248.0 exit ip route 192.168.5.0 255.255.255.0 10.254.254.1 ip route 192.168.6.0 255.255.255.0 10.254.254.1 ip route 0.0.0.0 0.0.0.0 192.168.4.10 show ip route IP Route Entries Destination Gateway VLAN Type Sub-Type M etric Dist. ------------------ --------------- ---- --------- ---------- - --------- ----- 0.0.0.0/0 192.168.4.10 1 static 1 1 10.10.0.0/21 esxi 4 connected 0 0 10.254.254.0/24 WAN 2 connected 0 0 127.0.0.0/8 reject static 0 250 127.0.0.1/32 lo0 connected 0 0 192.168.4.0/24 DEFAULT_VLAN 1 connected 0 0 192.168.5.0/24 10.254.254.1 2 static 1 1 192.168.6.0/24 10.254.254.1 2 static 1 1 192.168.7.0/24 Wireless 3 connected 0 0 show ip Internet (IP) Service IP Routing : Enabled Default TTL : 64 Arp Age : 20 VLAN | IP Config IP Address Subnet Mask Prox y ARP ------------ + ---------- --------------- --------------- ---- ----- DEFAULT_VLAN | Manual 192.168.4.6 255.255.255.0 No WAN | Manual 10.254.254.3 255.255.255.0 No Wireless | Manual 192.168.7.6 255.255.255.0 No esxi | Manual 10.10.1.1 255.255.248.0 No guest | Disabled

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• PS/2 to USB adapter doesn't work with Model M keyboard

  - by mickburkejnr

  I bought a server about 3 months ago from a friend, and I have only had time to tinker with it in the last week. I noticed that this server doesn't have any PS/2 ports, which meant configuring it was near impossible. I don't have any USB keyboards in the house, I only have an IBM Model M keyboard (built 1994) and another IBM keyboard that was built circa 2001. Both of them have PS/2 connections. I bought an adapter off eBay, and when I used it with the Model M keyboard the three lights on the keyboard flashed for a split second, but then the keyboard is then unresponsive. I can bash away at the keys for ages and nothing will happen. The same applies to the later built IBM keyboard. What could I do to make the adapter work? I am getting the loan of a USB keyboard in two weeks time, but I'd like a more permanent solution without having to rely on getting the loan of a keyboard every time I have to perform maintenance on the server. And as I already have two keyboards which work fine and I like using, I don't really want to have to buy another keyboard just for use on the server.

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• Create a special folder within an outlook PST file

  - by Tony Dallimore

  Original question I have two problems caused by missing special folders. I added a second email address for which Outlook created a new PST file with an Inbox to which emails are successfully imported. But there is no Deleted Items folder. If I attempt to delete an unwanted email it is struck out. If move an email to a different PST file it is copied. I created a new PST file using Data File Management. This PST file has no Drafts folder. This is not important but I fail to see why I cannot have Drafts folder if I want. Any suggestions for solving these problems, particularly the first, gratefully received. Update Thanks to Ramhound and Dave Rook for their helpful responses to my original question. I assumed the problem of not have a Drafts folder in an Archive PST file and not having a Deleted Items folder associated with an Inbox were part of the same problem or I would not have mentioned the Drafts folder issue since I have an easy work-around. Perhaps my question should have been: How to I load emails from an IMAP account and be able to delete the spam?

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