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• Computer sponteously reboots when doing heavy file copy to/from disk

  - by Mark Hosang

  I've been fighting with this problem for the last 3 weeks where my machine will just instantly reboot. No BSOD, and when i checked the event log all that was reported was the generic "Kernal-power" error with the detailed information pointing to a hard crash. This is a machine that was working for 18 months before these crashes started happening. When they started happening is after I added 3 HDs in a RAID-5, upped the memory to 12gb, moved to a new house, added a SSD and added about 5 case fans. I have thus eliminated the RAID, and determined that the SSD was not the cause (because it was still crashing even though the ssd wasn't connected). I've run memtest several times over night with no memory problems showing up. I've run IntelBurnTest to max out the cpu to see if it was a heat issue and at full tilt after 20 min it was only at 85C and the machine didn't crash. I also took a look at the voltages during this test, with a screenshot at the bottom of this post I've ruled out a software issue by reinstalling windows 7 ultimate x64 a total of 5 times, but even during that the install it crashes. Happens sometime during file copying at the beginning, or during uncompressing files, or sometimes during running windows update. The only discernible pattern i can see is that it seems to crash when hard disks might be spinning up or when they are accessed heavily from large file transfers. My current guess is that it is probably an issue with the MB, PSU or the power coming through the outlet. Any suggestions of what i could try to troubleshoot or what may be wrong? Specs PSU: Seasonic M12 700w Mem: 12gb CPU: i7-920 with stock heatsink MB: Asus P6T HDs: 3 green WD and 1 Corsair force 3 120b with 1.3.3 firmware Running full tilt voltages Idling Voltages

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• How can I wipe my iPod classic and fix any bad sectors on the hard drive without killing it?

  - by Sam Meldrum

  My iPod never finishes syncing and only syncs audio, not pictures or video. Any ideas as to how I can fix it? My iPod classic 160GB worked well for a couple of years. I used to sync a lot of photos at full resolution to it, but this recently stopped working after I moved to Windows 7. iTunes is on latest version - 9.1.1.12 iPod software is up to date - 1.1.2 Windows 7 is fully up to date and patched The symptoms are that the iPod will start to sync, all audio (music and podcasts will sync successfully) but the syncing will then just appear to continue - itunes message: Syncing iPod. Do not Disconnect. This sync never completes - I have left it trying for days. I have tried resetting the iPod using the Restore button, whereupon it restarts sync from default options and again will sync audio, but nothing else. I suspect that something has gone wrong on the hard-drive - either a bad sector or some corrupt data. Is there a process I can go through to fix this? E.g. SpinRite or a format? If so how do I go about formatting an iPod and will it be recognised as an iPod after format and work as normal? Any advice on what to try next much appreciated? Update I have eliminated problems with the files, PC or iTunes as they sync fine to other iPods. I have also eliminated the cable by trying different cables which work with other iPods. What I'd really like to know is if there is any way to more fundamentally wipe the iPod safely, attempt to repair any bad sectors on the hard drive and then start from scratch. Anyone ever managed this?

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• Port 22 is not responding

  - by Emanuele Feliziani

  I'm trying to make the jump to VPS from shared hosting for better performances and greater flexibility, but am stuck with the fact that I can't access the machine via ssh. First of all, the machine is a CentOS 6.3 cPanel x64 with WHM 11.38.0. Sshd is running (it appears in the current running processes). Making a port scan I see that port 22 is not responding. Port 21 is, but I am not able to access the machine via ftp (I think it's a security measure, but I don't know where to disable/enable it). So, I'm stuck in WHM and have no way to access the configuration of the machine, neither via ssh nor with ftp/sftp. When trying to connect with ssh via Terminal I only get this: ssh: connect to host xx.xx.xxx.xxx port 22: Operation timed out I also tried to access with the hostname instead of the IP address and it's the same. There seem to be no firewall in WHM and I have whitelisted my home IP address to access ssh, though there were no restrictions in the first place. I have been wandering through all the settings and options in WHM for several hours now, but can't seem to find anything. Does anybody have a clue as to where I should start investigating? Update: Thanks everyone. It was in fact a matter of firewall. There was a firewall not controlled by the WHM software. I managed to crack into the console from the vps control panel (a terrible, terrible java app that barely took my keyboard input) and disabled the firewall altogether running service iptables stop so that I was able to access the console via ssh with the terminal. Now I will have to set up the firewall again because the command I ran looks like having completely wiped the iptables. Can you recommend any newby-friendly resource where I can learn how to go about this and what should I block? Or should I just go with something like this: http://configserver.com/cp/csf.html ? Thanks again to everyone who helped me out.

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• Optimal video resolution and encoding for recording games for YouTube?

  - by Rookie

  I want to record video from games, therefore I cannot use very large video resolution, but I still want to make the large video view to look as sharp as the original encoded video before upload. I tried to use YouTube's recommended 854x640 resolution, but it wasn't possible with h264 and the encoding software I used (Handbrake) converted it to a width of the nearest multiple of 4, which I think is a limitation of the h264 format. The video I encoded was sharp and fine quality, but when I uploaded it to YouTube, it lost a lot of quality and the preferred large video view looks almost as bad as a 320p video. I tried to wait a few days but it never got sharper (in case it didn't process it completely yet). So, which resolution and encoding options I should use, if I want the large video player to have the sharpest possible video, retaining the original video quality as good as possible? I noticed that recording with 640x480, the video was sharper than with 1280x720, so I'm not sure what im doing wrong here; both were h264. Is it anyhow possible to prevent YouTube from re-encoding the videos? I just wonder how people can make so sharp videos, while mine are all blurry after upload, but before upload they looked fine. I also tried YouTube's suggested bitrates with h264, but it didn't work any better.

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• Virtual host redirects to localhost in Ubuntu

  - by Salman

  I have recently configured Virtual Host in my Ubuntu 11.10. But whatever site i type, it always redirects to the localhost page. This is my "our-test-site" file: <VirtualHost *:80> ServerAdmin webmaster@localhost DocumentRoot /var/www/zftut/public <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/zftut/public/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> and this is my, "etc/hosts" file: 127.0.0.1 localhost 127.0.0.1 our-test-site.local 127.0.0.1 zftut.local 127.0.1.1 System.B System Now when I try to go for "zftut.local", it redirects me to localhost page, showing me this: It works! This is the default web page for this server. The web server software is running but no content has been added, yet. What am I doing wrong? I refered "this" tutorial for setting up virtual host.

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• error: unexplained error (code 130) at rsync.c(541) [sender=3.0.7]

  - by brazorf

  This error: unexplained error (code 130) at rsync.c(541) [sender=3.0.7] error is happening after i changed router. Actually, i found out that this error just happens on a ctrl+c signal, so it could be not representative about the error itself. The command i run is very basic: rsync -avz --delete /local/path/ username@host:/path/to/remote/directory Basically, the rsync just stuck there and nothing's happening, until i ctrl+c. After interrupting the process i got the error in subject. I past the whole thing here: rsync -avvvvz --delete /source/path/ username@host:/path/to/direectory cmd=<NULL> machine=HOSTNAME user=username path=/path/to/direectory cmd[0]=ssh cmd[1]=-l cmd[2]=username cmd[3]=HOSTNAME cmd[4]=rsync cmd[5]=--server cmd[6]=-vvvvlogDtprze.iLsf cmd[7]=--delete cmd[8]=. cmd[9]=/path/to/direectory opening connection using: ssh -l username HOSTNAME rsync --server -vvvvlogDtprze.iLsf --delete . /path/to/direectory note: iconv_open("UTF-8", "UTF-8") succeeded. ^C[sender] _exit_cleanup(code=20, file=rsync.c, line=541): entered rsync error: unexplained error (code 130) at rsync.c(541) [sender=3.0.7] [sender] _exit_cleanup(code=20, file=rsync.c, line=541): about to call exit(130) The authentication runs on ssh via rsa key. I tried basic troubleshoot such as: ping the remote host ssh -l username remote.host check software firewall logs i asked the remote host sysadmin to check for logs, and when i run that command a ssh connection is actually being established and i can state there is no comunication/authentication/name resolution issue here. Rolling back to old router make this work again. Both client and server are running ubuntu 10.04. Try to take a look at my router configuration, where i'm no experienced at all, but i didnt see any "suspect" (what i was looking for is firewall blocking something) setting. The router itself is DLINK DVA-G3670B. Any suggestion? Thank You F.

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• Router drops internet connection if I connect an additional pc

  - by BluePerry

  Hey, I'm using a SMC2804WBRP-G router connected to my ADSL-modem. Usually there are two computers connected to this router: a win7 ultimate desktop(wired) and a macbook air (wireless). Both working absolutely fine and never caused any connection drops as far as I know. A new room mate moved in last month and each time she starts up her win7 home laptop the router looses the internet connection. The laptop is on a wired connection. The first time she connected to my router, the connection dropped every 2 mins. To find out whats wrong with her machine I disabled all unnecessary services etc. besides the anti virus software. That helped to eliminate almost all of those periodic connection drops. But the start up drop remained and I've got the feeling that the router is still loosing connection from time to time. I haven't had the time to find out what service caused the periodic drops. But I'm more concerned about is that start up drop. Can anyone point me in the right direction to look for the problem? I would be very thankful for any hints or tips!

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• UDP blocked by Windows XP Firewall when sending to local machine

  - by user36367

  I work for a software development company but the issue doesn't seem to be programming-related. Here is my setup: Windows XP Professional with Service Pack 3, all updated Program that sends UDP datagrams Program that receives UDP datagrams Windows Firewall set to allow inbound UDP datagrams on a specific port (Scope: Subnet) If I send a UDP datagram on any port to other, similar machines, it goes through. If I send the UDP datagram to the same computer running the program that sends (whether using broadcast, localhost IP or the specific IP of the machine), the receiver program gets nothing. I've traced the problem down to the Windows XP Firewall, as Windows 7 does not have this problem (and I do not wish to sully my hands with Vista). If the exception I create for that UDP port in the WinXP firewall is set for a Scope of Subnet the datagram is blocked, but if I set it to All Computers or specifically enter my network settings (192.168.2.161 or 192.168.2.0/255.255.255.0) it works fine. Using different UDP ports makes no difference. I've tried different programs to reproduce this problem (ServerTalk to send and either IP Port Spy or PortPeeker to receive) to make sure it's not our code that's the issue, and those programs' datagrams were blocked as well. Also, that computer only has one network interface, so there are no additional network weirdness. I receive my IP from a DHCP server, so this is a straightforward setup. Given that it doesn't happen in Windows 7 I must assume it's a defect in the Windows XP Firewall, but I'd think someone else would have encountered this problem before. Has anyone encountered anything like this? Any ideas?

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• Applications randomly alt-tab? (especially full screen games)

  - by Henry Scotts

  I'm not sure when this began, how it happens, or why it happens, but it is quite bothersome and apparently random. Just randomly throughout the day my computer will just go to the desktop. I could be in a full screen game and it will just immediately alt tab and present the desktop. Or I could be watching a movie and this happens. Sometimes it happens once every three hours and other times (just today actually) it did it twice in the span of 30 seconds. I am positive I am not pressing a hotkey because I launched a game, sat idle, and noticed it alt tab while cleaning up around my room after about 20 minutes. Sometimes it goes days without this happening. Specs: Windows 7 Ultimate 64 Bit, 10 gigs of RAM, GeForce GTX 260, Intel Xeon CPU. I also have basically nothing running when it happens other than the game and FireFox. My FireFox add-ons: Adblock Plus, Download Statusbar, Firebug, FirePHP, lazarus form recovery, tree-style-tabs, yslow. I doubt FireFox is causing the issue but I figured I'd include it anyway because it is the only application I have running when it happens. As for user processes I have running: VCDDaemon (context menu for virtual clone drive), razerhid (mouse), OSD, taskhost, dmw (desktop window manager), anyfullscreengame, audiorepeater, netsession_win, explorer, razerofa, tsvncache, firefox, plugin-container, and EKIJ5000MUI (printer). Whew. Okay. That was a lot of information. If someone could diagnose this I would be most grateful for this has been around with me for years.. Thanks for reading! PS: I doubt it's a virus because I never download illegal software and pretty much only browse Reddit and Stackexchange and play games. If it was a virus it would be a pretty lame one.. Hah..

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• Small store infrastructure - where to begin?

  - by KevinM1

  It looks like my older brother is about to change jobs - from lawyer to shooting range proprietor - and since I'm the family 'computer guy' I have the task of coming up with and setting up the in-store equipment. Only problem, I don't know how to start or where to look. I'm a web programmer, not an IT specialist. To that end, I figured I should ask the pros. Users: 3 (myself, my brother, and his business partner) Equipment: 1 Windows (likely 7) desktop for POS software, 1 Windows desktop/laptop for backroom use (bookkeeping, etc.) Other: ?? I'm looking for a reliable and, well, idiot-proof way to handle backups. Neither my brother nor his business partner are tech savvy (A web browser, email, MS Word and Excel are about the extent of their knowledge), so I need something they can handle. On-site would be preferable to off-site, given my brother's hesitance to have sensitive business data be handled by an outside source. I'm also looking for a small on-site server. I estimate that, at most, only 2-3 users will need access. A linux solution would keep costs down, but I'm concerned about Windows <- linux interoperability. Would the store security cameras' storage be handled by the security company, or would we have to stream that data to our own server? I know from my own experience with personal security that the company gives/loans a recording device to the home owner, but I'm not sure about business security. I know this sounds like a shopping list, and it's pretty vague. I wish I could give more detail, but between my own ignorance and things not being 100% nailed down on the business end, I'm a bit stuck. At the very least I'd like a nudge - links on a place to start, what to look for, things I need to think about, etc. - for this endeavor. Thanks.

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• WinHttpCertCfg not importing certificate

  - by Ramon Zarazua

  I need to setup a deployment script that imports an SSL certificate that my service uses. I have tried importing with WinHttpCertCfg and with CertMgr to no avail. Here are the command-line arguments I have tried to use with both: winhttpcertcfg.exe -i <certname>.pfx -c LOCAL_MACHINE\My -p <password> -a <user service runs as> and CertMgr.exe -add -all -s -r localMachine -c <cert name> My It seems from what I have investigated that CertMgr does not allow you to import certificates with a password, so I'd rather get winhttpcertcfg working. When I run them I get the following output: WinHttpCertCfg: Microsoft (R) WinHTTP Certificate Configuration Tool Copyright (C) Microsoft Corporation 2001. CertMgr: CertMgr Succeeded However, when I look into the local machine certificates in MMC, try to load them from my service, or list it out through winhttpcertcfg, or even looking at the registry in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\MY\Certificates it is not found. I have tried all of the following: If I install the cert manually (Through CertMgr.msc dialogs) it works. The user installing is running as administrator The user installing has full access on the certificate The tools print out an error when something is wrong (wrong password) Tried it in multiple machines (All of them server 2008 R2) At this point I am officially out of ideas. Thank you.

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• Production deployment to EC2 with minimal downtime

  - by jensendarren

  I have a simple web application deployed on a large instance with EC2. I now want to deploy the latest code to this server but I want to do this in a way which minimizes downtime and is a smooth as possible for the end user. Here is my plan: Fire up another large instance Install all the software layers on that instance Restore and attach an EBS drive to the instance Deploy our latest production ready code on the new instance Run all tests (including manual testing of the application) (If tests pass) Put a "Site Under Maintenance" notice on the live site. Backup the EBS instance on the live site Detach the EBS instance from the new server and replace with the latest backup Use ec2-associate-address to move the IP address to the new instance Sit back and wait for traffic to start flowing though the new instance Terminate the old instance Does this seem like a good strategy? Are there any tutorials or books that might cover this topic? I have already read Cloud Application Architectures by George Reese, which is an excellent book, but does not cover deployment. Additionally, I know that there are tools that can help with this like RightScale or enStratus which I will use when I start using more than one instance.

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• OpenVZ vs KVM for Linux VMs

  - by Eliasdx

  Hardware: Intel® Core™ i7-920, 12 GB DDR3 RAM, 2 x 1500 GB SATA-II HDD (no SoftRaid because Proxmox developers don't support softraid and they are sure you'll run into problems) Software: Proxmox VE with KVM and OpenVZ support and debian everywhere I want to run multiple Linux VMs on this server. One for a firewall (I want to try pfSense), one for MySQL, one VM for nginx (my stuff) and ~2 VMs with nginx for other people's web sites. I don't think that pfSense will run in an OpenVZ environment but it should run in KVM. The question is if I should setup the other VMs using KVM or OpenVZ. In OpenVZ they should have less overhead for the OS itself but I don't know about the performance. I heard that KVM is more stable but needs more RAM and CPU. I found this diagram showing a OpenVZ setup on the same hardware I'm using. This guy uses an own VM for each and every website which is running on his server. I can't think of any advantage why he's using so many VMs.

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• PowerShell 3.0 x64 bit broken after installing KB2506143

  - by Dave Parker

  I have searched using all kinds of variations on relevant terms and I cannot find a single other instance of someone else having this excact same problem, so I am hoping someone here may have a clue. Problem I installed Windows Management Framework 3.0 (KB2506143) by downloading and running Windows6.1-KB2506143-x64.msu from Microsoft.com. Once completed I rebooted my machine as requested. After rebooting and logging in, I try to run the 64-bit PowerShell command shell and it comes up for a second then goes away. The 32-bit shell seems to work fine, it is just the 64-bit one that fails. Looking in the Fusion logs, I found: *** Assembly Binder Log Entry (10/4/2012 @ 1:51:48 PM) *** The operation failed. Bind result: hr = 0x80070002. The system cannot find the file specified. Assembly manager loaded from: C:\Windows\Microsoft.NET\Framework64\v2.0.50727\mscorwks.dll Running under executable C:\WINDOWS\system32\WindowsPowerShell\v1.0\powershell.exe --- A detailed error log follows. === Pre-bind state information === LOG: User = ********\***** LOG: DisplayName = Microsoft.PowerShell.ConsoleHost, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL <remainder omitted> GacUtil reveals that there is a Microsoft.PowerShell.ConsoleHost, Version=1.0.0.0, but not 3.0.0.0. I tried uninstalling KB2506143 (which removed MSVCRT90.dll and caused Windows Live Messenger to fail on load after rebooting again, so I ran a repair in stall on Windows Live Essentials and that fixed the Messenger problem) and then re-installing it, but nothing changed. If it helps, here are what I think may be the relevant parts of my hardware/software environment. Environment Dell Latitude E6510, 8GB RAM Windows 7 Professional 64-bit with SP1 Visual Studio 2010 Professional installed (includes .NET 4.0) Visual Studio 2012 Professional installed Microsoft Forefront Client Security Any clues out there? Thanks, Dave

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• Internet Explorer will not open

  - by KCotreau

  I recently migrated a company to a Microsoft domain environment, logged the users in under their new domain accounts, and then copied the old profiles to the new profile. I am not sure if that is related since they did not complain about it right away and it may have been a subsequent patch or something, but I have two XP computers that will not open IE8. You click on it, and it nothing graphically happens at all, but you can see a process in task manager. If you click many times, you get multiple instances. It will appear often TWICE per click. It still works in the old profile, so it is specific to the profile, and I would like to fix it rather than blow it away. Here is what I have done without success: Tried opening without add-ons (the one in System Tools) Reinstalled IE8 Ran SFC /SCANNOW I found a script that was supposed to repair any registry entries, and ran it. I tried exporting the whole HKCU\Software\Microsoft\Internet Explorer key and deleting it, hoping that when I restarted it, it would recreate it...No joy. I restored it. Any ideas?

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• Fix bad superblock on logical partition

  - by Chris

  I was following http://www.howtoforge.com/linux_resi...xt3_partitions and when i reboot and run: root@Microknoppix:/home/knoppix# fsck -n /dev/sda7 fsck from util-linux-ng 2.17.2 e2fsck 1.41.12 (17-May-2010) fsck.ext2: Superblock invalid, trying backup blocks... fsck.ext2: Bad magic number in super-block while trying to open /dev/sda7 The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> so i ran e2fsck with all the block numbers that you need (forget exactly what tool i used to find where the superblocks are hidden) no dice then i ran testdisk and had it look for the superblock, no results anyone have any ideas? fdisk -l for reference: root@Microknoppix:/home/knoppix# fdisk -l Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x97646c29 Device Boot Start End Blocks Id System /dev/sda1 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 38912 312046593 f W95 Ext'd (LBA) /dev/sda5 64 326 2104320 82 Linux swap / Solaris /dev/sda6 * 327 2938 20972544 83 Linux /dev/sda7 2938 38912 288968672+ 83 Linux To be honest it looks like I lost it... Next step if that happens is to dump the partition to an image file and hope i can find or write some software to parse through the data looking for known file headers, i think.

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• Apache reports a 200 status for non-existent WordPress URLs

  - by Jonah Bishop

  The WordPress .htaccess generally has the following rewrite rules: # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> When I access a non-existent URL at my website, this rewrite rule gets hit, redirects to index.php, and serves up my custom 404.php template file. The status code that gets sent back to the client is the correct 404, as shown in this HTTP Live Headers output example: http://www.borngeek.com/nothere/ GET /nothere/ HTTP/1.1 Host: www.borngeek.com {...} HTTP/1.1 404 Not Found However, Apache reports the entire exchange with a 200 status code in my server log, as shown here in a log snippet (trimmed for simplicity): {...} "GET /nothere/ HTTP/1.1" 200 2155 "-" {...} This makes some sense to me, seeing as the original request was redirected to page that exists (index.php). Is there a way to force Apache to report the exchange as a 404? My problem is that bogus requests coming from Bad Guys show up as "successful requests" in the various server statistics software I use (AWStats, Analog, etc). I'd love to have them show up on the Apache side as 404s so that they get filtered out from the stat reports that get generated. I tried adding the following line to my .htaccess, but it had no effect (I'm guessing for the same reason as the previous redirect rules): ErrorDocument 404 /index.php?error=404 Does anyone have a clever way to fix this annoyance? Additional Info: OS is Debian 6.0.4, and Apache version looks to be 2.2.22-3 (hosted on DreamHost) The 404 being sent back to the client is being set by WordPress (i.e. I'm not manually calling header() anywhere)

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• IIS crashes with unhandled exception in ASP.NET

  - by SnowCrash

  We had an issue recently with an unhandled exception in an ASP.NET C# application bringing down IIS and all application pools that it was hosting. IIS Manager was unable to restart or stop/start the service and I was unable start IIS again after killing w3wp.exe in the task manager. A system reboot restored IIS to a running state; as a primarily Linux admin, I generally consider an unplanned system reboot to resolve a software error to be an act of high heresy. Is there a way to "harden" IIS so that a faulting application does not affect anything but the request that exposes the fault? Some details on the server and application fault. IIS: 7.5 .NET: 4.0 Windows Server 2008 R2 Faulted on call to System.Net.Dns.Resolve() with a url pointing to a non-existant domain as the argument. (I'm aware that this method is deprecated but the point that a page code issue shouldn't bring down the server still stands) The exception generated was SocketException. The faulting module according to event viewer was KERNELBASE.dll The issue was resolved by wrapping the call in a try-catch, logging the exception and displaying some generic content on the page. I'm hoping that I missed something in the IIS config that would switch it to "production" mode or something.

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• CLOSE_WAIT sockets burst - perhaps because of iptables settings?

  - by Fabrizio Giudici

  I have an Ubuntu 12.04 server virtual box where basically the installed software and configuration are the default ones, plus the installation of a jetty 6 server which servers a few websites. To keep things simple I didn't install apache httpd and used iptables for exposing jetty (which runs on the 8080 port) to the port 80. These are the results of /sbin/iptables -t nat -L Chain PREROUTING (policy ACCEPT) target prot opt source destination REDIRECT tcp -- anywhere localhost tcp dpt:http redir ports 8080 REDIRECT tcp -- anywhere Ubuntu-1104-natty-64-minimal tcp dpt:http redir ports 8080 Chain INPUT (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination REDIRECT tcp -- anywhere localhost tcp dpt:http redir ports 8080 REDIRECT tcp -- anywhere Ubuntu-1104-natty-64-minimal tcp dpt:http redir ports 8080 Chain POSTROUTING (policy ACCEPT) target prot opt source destination I must confess I have a shallow comprehension of how iptables works, in particular for the different kind of chains. This thing works, but sometimes I have an explosion of sockets that stay permanently in CLOSE_WAIT state. I know about what this state means, but since I didn't write the code that manages servlets (they are handled by jetty) I can't fix the problem by patching my code. Eventually the amount of CLOSE_WAIT sockets builds up and makes the server not responsive, so I have to restart jetty. I've looked around for similar problems wth CLOSE_WAIT, and only found cases related to the programmer's code, or problems with Tomcat, not Jetty. I was wondering whether they could be related to a partially broken iptables configuration (the alternative is a bug in Jetty 6, but I first want to exclude other possible causes). Thanks.

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• Why does Internet Explorer sometimes fail to connect to anything until I restart it?

  - by cletus

  IE has an annoying problem on my PC (XP SP3). I start it and try to go to Google (for example) and it'll sit there saying "Connecting" but nothing will happen and it doesn't matter how many times I try, it won't connect to anything. I discovered that if I kill IE and restart it then it might start working (and then it'll work every time). It might takes 3-4 restarts (of IE, not the PC) to get a working IE. Now I wouldn't normally care about this since I use Chrome but a lot of things use IE by default like Windows Update and the online help in Office 2003 so I would like to fix it. Interestingly, my work laptop, which is running Windows 7 RC 64-bit, has exactly the same problem (completely different network and everything). I'm utterly convinced it's not a network or hardware problem but some software problem. Edit: More info. It's IE8; No add-ons; Automatically detect settings is not enabled. It is set to "Never dial a connection".

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• Multi monitor setup with a tv as well?

  - by jasondavis

  I have always had a dual monitor setup for my pc's for years now. I am now in the market to build a new PC and get some new stuff. I need some help or advice on how to run 3 monitors WITH a 4th display which will be a lcd/plasma tv. So I am thinking I can get 2 video cards and that will give me all the hookups to run 3 monitors instead of 2. I will mount all 3 monitors in a row side by side and above them on the wall I would like to mount a larger 30-40+ inch lcd or plasma tv. I would then like to hook up my atelite/cable to this tv just as I would normally hook up a tv but I would like to also be able to have an option to view my PC o this tv as well. I know that is possible but would it be possible to view my PC on that tv and also still view my 3 other monitors and have the TV be a 4th display, where I could dock a different app/window in windows in all 4 displays (3 monitors + tv) ?? Please tell me any tips/advice on how to do this including what cables/software if any/converters/ you name it. Thanks for any help

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• Problems with 5.1 digital out on Ubuntu 12.04

  - by user895319

  I've recently bought a new PC, installed Ubuntu and am now unable to get 5.1 digital sound working. Simple analogue stereo works fine on both the front and rear connectors. On my old box I connected the coax connection from my soundcard to my surround sound amplifier, set Settings-Sound to "Digital Stereo Duplex" and it worked. My old soundcard doesn't fit in my new machine so I'm using the built-in sound hardware. I'm connecting the combination output socket on the back of the PC via the same cable to my surround amp as before. The MB is an MSI Global H61M-P31 with an RealTek ALC887 sound chip. When I go to Settings-Sound I only see "Headphone Built-in Audio" and "Analogue Output Built-in Audio" - no digitial options. The output from aplay -l is: default Playback/recording through the PulseAudio sound server sysdefault:CARD=PCH HDA Intel PCH, ALC887-VD Analog Default Audio Device front:CARD=PCH,DEV=0 HDA Intel PCH, ALC887-VD Analog Front speakers surround40:CARD=PCH,DEV=0 HDA Intel PCH, ALC887-VD Analog 4.0 Surround output to Front and Rear speakers surround41:CARD=PCH,DEV=0 HDA Intel PCH, ALC887-VD Analog 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=PCH,DEV=0 HDA Intel PCH, ALC887-VD Analog 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=PCH,DEV=0 HDA Intel PCH, ALC887-VD Analog 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=PCH,DEV=0 HDA Intel PCH, ALC887-VD Analog 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers dmix:CARD=PCH,DEV=0 HDA Intel PCH, ALC887-VD Analog Direct sample mixing device dsnoop:CARD=PCH,DEV=0 HDA Intel PCH, ALC887-VD Analog Direct sample snooping device hw:CARD=PCH,DEV=0 HDA Intel PCH, ALC887-VD Analog Direct hardware device without any conversions plughw:CARD=PCH,DEV=0 HDA Intel PCH, ALC887-VD Analog Hardware device with all software conversions While googling for ALC887 I've seen some references to "ALC887 -VD Analog" and some to "ALC887 -VD Digital". Does anyone know if I need to force it to chance mode somehow? It's worth mentioning that when I set the output to 5.1 digital surround in Windows 7 on the same machine I still don't get any sound so it's not a unique Linux problem. Thanks for any help.

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• Windows Server 2012 Hyper-V very slow

  - by Matt Taylor

  I have been running several Hyper-V VMs on Windows Server 2008 R2 for the past couple of years and enjoying perfectly adequate performance for my testing/development/r&d environments. I'm a software developer so my hardware knowledge is basic however I built the rig using: •Gigabyte GA-X58A-UD3R Intel X58 (Socket 1366) DDR3 Motherboard •Intel Core i7 960 3.20GHz (Bloomfield) (Socket LGA1366) •24GB triple channel RAM The host OS is running on an OCZ SSD and all the VMs are running on a 2TB Marvell SATA3 RAID 0 array consisting of 2 Western Digital Caviar Black 7,200rpm drives. I have tested the speed of the 2TB drive and appear to be getting less than 3Mbs but it can adequately run a 4 VM farm including a DC, (SQL) database and IIS application servers. I recently upgraded the SSD on which the host runs to a 256GB OCZ Vertex 4 and took the opportunity to upgrade to Windows Server 2012 and installed the Hyper-V role. I tried importing one of my existing Windows Server 2008 R2 VMs (and converted it to .vhdx) plus I have tried creating a brand new Windows Server 2008 R2 VM but both are running extremely slowly and I can see nothing obvious using the host and guest Task Manager/Resource Monitor tools. In both cases the VM has 8GB RAM (fixed), 4 CPUs, fixed size HD (not expanding) and is using an external virtual network running on a separate NIC to the host. I have upgraded the BIOS to the latest available version and checked the virtualization settings. I have run out of "obvious" (to a developer) things to check/configure and my next option will be to re-install the host OS but before I do I would very much appreciate any advice from any experts out there. Thanks

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• UDP blocked by Windows XP Firewall when sending to local machine

  - by user36367

  Hi there, I work for a software development company but the issue doesn't seem to be programming-related. Here is my setup: - Windows XP Professional with Service Pack 3, all updated - Program that sends UDP datagrams - Program that receives UDP datagrams - Windows Firewall set to allow inbound UDP datagrams on a specific port (Scope: Subnet) If I send a UDP datagram on any port to other, similar machines, it goes through. If I send the UDP datagram to the same computer running the program that sends (whether using broadcast, localhost IP or the specific IP of the machine), the receiver program gets nothing. I've traced the problem down to the Windows XP Firewall, as Windows 7 does not have this problem (and I do not wish to sully my hands with Vista). If the exception I create for that UDP port in the WinXP firewall is set for a Scope of Subnet the datagram is blocked, but if I set it to All Computers or specifically enter my network settings (192.168.2.161 or 192.168.2.0/255.255.255.0) it works fine. Using different UDP ports makes no difference. I've tried different programs to reproduce this problem (ServerTalk to send and either IP Port Spy or PortPeeker to receive) to make sure it's not our code that's the issue, and those programs' datagrams were blocked as well. Also, that computer only has one network interface, so there are no additional network weirdness. I receive my IP from a DHCP server, so this is a straightforward setup. Given that it doesn't happen in Windows 7 I must assume it's a defect in the Windows XP Firewall, but I'd think someone else would have encountered this problem before. Has anyone encountered anything like this? Any ideas? Thanks in advance!

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• Green flickering pixels that move with black images

  - by user568458

  Strange question... Occasionally, on my LCD screen, pixels that should be black flicker rapidly and constantly between black and green, about 4 flickers a second. The crazy part is, unlike dead/stuck pixels, they are relative to content on the screen and move with it. For example, I might be looking at a web page with a picture that has lots of black. There might be a couple of green flashing pixels in that black that shouldn't be there. I scroll the page, and the green flickering pixels move with the image. It seems that everyphysical pixel is fine, but somehow something interprets part of the image in a way that causes flickering green... It's not just in a web browser. My first thought was to blame a trolling blogger cunningly uploading an animated gif that simulates a failing pixel... but it happens in a wide range of applications. It seems to occur randomly, other than that it seems to only occur in areas of pure black, and it's always pure 100% green. It happens rarely enough that it's not a big deal, but it's such a strange problem it bugs me. I can't find any info on anything like this. I'm not even sure if it's hardware or software. Any ideas? (windows 7 laptop connected to LCD by DVI to HDMI cable)

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