n00dled00d Posted May 13, 2008 Report Share Posted May 13, 2008 I've been using uTorrent for years and never had any problems until yesterday.Around 4 pm on tuesday, my internet connection died. I tried using "repair" on the connection but it didn't work. All it got me was a private IP-address because it couldn't get one off the DHCP. After that I attempted an ipconfig /flushdns, ipconfig /release and ipconfig /renew. Same result.I had to reboot in order to get internet working again, for a few minutes. Then it happened again and I was forced to reboot. So far rebooting is the ONLY way I've found to get an IP-address again.It took me half a day to find that bittorrents are the culprit. When uTorrent isn't seeding or downloading anything, everything works just fine. As soon as I attempt to start a torrent or download a new one, I lost internet connection. The connection icon down in the systray goes totally black.Downloading files (tried both small and large, from multiple servers, simultaneously, to both my harddrives) using Opera and IE works fine. So does FTP, surfing the web, talking through skype, using Live Messenger, filesharing (extensively) using eMule, playing games and everything else I've thrown at it. I tried using BitComet and Azureus, and I lose internet connection as well.The only thing I tried that works is if I start a virtual machine running Win 2k with uTorrent in VmWare.My configuration is as follows:* MSI P35 Neo2-Fir Motherboard* Core 2 Duo E6750 CPU (overclocked to 3,4 GHz)* 4 Gb of Crucial BallistiX DDR2-ram* MSI Nvidia 7600GS gfx-card* Seagate 7200.11 320 GB as system drive* Western Digital Caviar GP 1 TB as a storage drive* Running Windows 2003 Enterprise Server with SP2 on an educational licenseMy ISP is Bredbandsbolaget 100 mbit and I have no router nor firewall of any kind, only a gigabit-switch and I get the same problem when I try connecting the ethernet-cable directly to the computer.Other things I've tried in different sorts of combinations without any luck:* Updating BIOS, Intel motherboard drivers and Realtek 8111C (NIC) drivers* Turning off TCP offloading in the NIC-driver* Turning off overclocking of my CPU* Changing ALL SORT of settings in both Azureus and uTorrent including encryption on/off, port used, number of connections etc* Running Windows in safe mode with networking* Shutting off the Windows firewall* After the connection stopped working, restarting the Windows DHCP Service* Running no other program but uTorrent* Shutting all the hardware down for 10 min before starting it up again* Making sure all cables are connected properly* Checked for Spyware using HiJackThis, Ad-aware, Spybot, Combofix, GMER and Windows Defender* Checked for viruses using the retail version of NOD32* Made sure I have all the latest Windows updates as of today* Waiting, just waiting for the internet connection to come back up after I quit uTorrent[Edit: Added:* Turn off NOD32 and the Windows Firewall* Tried different torrents from different trackers* Changing the number of half-open ports using the patch from lvllord.de* Ran LSPfix (it found nothing wrong)* Reset the winsock using netsh* Tried the official Bittorrent-client, Bittornado, uTorrent 1.6 and the 1.8 beta* Ran Realtek-diagnostics, no errors* After the net goes down, reset the NIC-driver using the Realtek-diagnostics tool* Ran Registry Repair* Checked the Windows System and Software log, no errors in it* Tried a really old Realtek driver for the NICWhat remains to try that I can think of:* Run Diskcheck on both harddrives (will take many hours)* Try using a dedicated NIC (I don't own one though and would need to buy one)I haven't changed any settings, installed or uninstalled any programs or done anything prior to this happening.Both uTorrent and Azureus work just fine if I run it in a virtual machine or on my laptop (running Win XP SP3). If I start a few torrents that I'm seeding, and there are no leechers everything works fine. As soon as someone starts downloading, hence making me seed, I lose my connection.Since I've run out of ideas, I'm all open to suggestions.Thanks./nd Link to comment Share on other sites More sharing options...
Firon Posted May 14, 2008 Report Share Posted May 14, 2008 Can you post a HijackThis log? Link to comment Share on other sites More sharing options...
n00dled00d Posted May 14, 2008 Author Report Share Posted May 14, 2008 Logfile of Trend Micro HijackThis v2.0.2Scan saved at 06:51:52, on 2008-05-14Platform: Windows 2003 SP2 (WinNT 5.02.3790)MSIE: Internet Explorer v7.00 (7.00.6000.16640)Boot mode: NormalRunning processes:C:\WINDOWS\System32\smss.exeC:\WINDOWS\system32\winlogon.exeC:\WINDOWS\system32\services.exeC:\WINDOWS\system32\lsass.exeC:\WINDOWS\system32\svchost.exeC:\Program\Windows Defender\MsMpEng.exeC:\WINDOWS\System32\svchost.exeC:\Program\WIDCOMM\Bluetooth Software\bin\btwdins.exeC:\WINDOWS\system32\spoolsv.exeC:\WINDOWS\system32\netdde.exeC:\Program\CACHEM~1\CachemanXP.exeC:\WINDOWS\system32\clipsrv.exeC:\Program\NOD32 Antivirus\ekrn.exeC:\WINDOWS\System32\svchost.exeC:\Program\Intel\Intel Matrix Storage Manager\Iaantmon.exeC:\WINDOWS\system32\tcpsvcs.exeC:\Program\Delade filer\Microsoft Shared\VS7DEBUG\mdm.exeC:\Program\Nero\Nero8\Nero BackItUp\NBService.exeC:\WINDOWS\system32\nvsvc32.exeC:\Program\Raxco PerfectDisk 2008\PD91Agent.exeC:\Program\Delade filer\VMware\VMware Virtual Image Editing\vmount2.exeC:\WINDOWS\system32\vmnat.exeC:\WINDOWS\system32\vmnetdhcp.exeC:\Program\VMware\VMware Workstation\vmware-authd.exeC:\WINDOWS\System32\svchost.exeC:\WINDOWS\Explorer.EXEC:\Program\Intel\Intel Matrix Storage Manager\Iaanotif.exeC:\Program\Microsoft Office\Office12\GrooveMonitor.exeC:\Program\Adobe\Acrobat\Acrobat\Acrotray.exeC:\Program\NOD32 Antivirus\egui.exeC:\Program\Windows Defender\MSASCui.exeC:\Program\VMware\VMware Workstation\vmware-tray.exeC:\Program\VMware\VMware Workstation\hqtray.exeC:\WINDOWS\system32\kxmixer.exeC:\WINDOWS\system32\RUNDLL32.EXEC:\Program\Winamp\winampa.exeC:\Program\Java\jre1.6.0_05\bin\jusched.exeC:\WINDOWS\RTHDCPL.EXEC:\Program\Logitech\MouseWare\system\em_exec.exeC:\Program\Realtek\Diagnostics Utility\8169Diag.exeC:\Program\uTorrent\uTorrent.exeC:\Program\Skype\Phone\Skype.exeC:\Program\Weather Watcher\ww.exeC:\Program\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exeC:\Program\Spybot - Search & Destroy\TeaTimer.exeC:\Program\Nokia\Nokia PC Suite 6\PCSuite.exeC:\Program\Nokia\Nokia PC Suite 6\PCSync2.exeC:\Program\WIDCOMM\Bluetooth Software\BTTray.exeC:\Program\PC Connectivity Solution\ServiceLayer.exeC:\Program\Trillian\trillian.exeC:\Program\WIDCOMM\BLUETO~1\BTSTAC~1.EXEC:\WINDOWS\System32\svchost.exeC:\Program\Delade filer\Nokia\MPAPI\MPAPI3s.exeC:\Program\Skype\Plugin Manager\skypePM.exeC:\Program\PC Connectivity Solution\Transports\NclUSBSrv.exeC:\Program\Opera\Opera.exeC:\Program\HijackThis\HijackThis.exeR0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = about:blankR1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://go.microsoft.com/fwlink/?LinkId=74005R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.localR0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = LänkarF2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe,C:\WINDOWS\system32\wmsdkns.exe,O1 - Hosts: 127.255.255.255 serial.alcohol-soft.comO2 - BHO: Länkhjälp till Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program\Delade filer\Adobe\Acrobat\ActiveX\AcroIEHelper.dllO2 - BHO: (no name) - {15651c7c-e812-44a2-a9ac-b467a2233e7d} - (no file)O2 - BHO: Skype add-on (mastermind) - {22BF413B-C6D2-4d91-82A9-A0F997BA588C} - C:\Program\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dllO2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\Program\Spybot - Search & Destroy\SDHelper.dllO2 - BHO: (no name) - {622cc208-b014-4fe0-801b-874a5e5e403a} - (no file)O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\Program\Microsoft Office\Office12\GrooveShellExtensions.dllO2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program\Java\jre1.6.0_05\bin\ssv.dllO2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)O2 - BHO: (no name) - {9c5b2f29-1f46-4639-a6b4-828942301d3e} - (no file)O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program\google\googletoolbar1.dllO2 - BHO: Adobe PDF Conversion Toolbar Helper - {AE7CD045-E861-484f-8273-0445EE161910} - C:\Program\Adobe\Acrobat\Acrobat\AcroIEFavClient.dllO2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program\Google\GoogleToolbarNotifier\2.0.301.7164\swg.dllO2 - BHO: Servicecenter Plugin - {DB87CDE1-EF9C-44EB-A42F-6D0B3C72C516} - C:\Program\Bredbandsbolaget\Servicecenter\IEFixItNowPlugin.dllO2 - BHO: FlashFXP Helper for Internet Explorer - {E5A1691B-D188-4419-AD02-90002030B8EE} - C:\Program\FlashFXP\IEFlash.dllO2 - BHO: (no name) - {ffff0001-0002-101a-a3c9-08002b2f49fb} - (no file)O3 - Toolbar: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - C:\Program\Adobe\Acrobat\Acrobat\AcroIEFavClient.dllO3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program\google\googletoolbar1.dllO4 - HKLM\..\Run: [IAAnotif] "C:\Program\Intel\Intel Matrix Storage Manager\Iaanotif.exe"O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartupO4 - HKLM\..\Run: [nwiz] nwiz.exe /installO4 - HKLM\..\Run: [Logitech Utility] Logi_MwX.ExeO4 - HKLM\..\Run: [GrooveMonitor] "C:\Program\Microsoft Office\Office12\GrooveMonitor.exe"O4 - HKLM\..\Run: [Acrobat Assistant 8.0] "C:\Program\Adobe\Acrobat\Acrobat\Acrotray.exe"O4 - HKLM\..\Run: [egui] "C:\Program\NOD32 Antivirus\egui.exe" /hide /waitserviceO4 - HKLM\..\Run: [Windows Defender] "C:\Program\Windows Defender\MSASCui.exe" -hideO4 - HKLM\..\Run: [vmware-tray] C:\Program\VMware\VMware Workstation\vmware-tray.exeO4 - HKLM\..\Run: [VMware hqtray] "C:\Program\VMware\VMware Workstation\hqtray.exe"O4 - HKLM\..\Run: [kX Mixer] C:\WINDOWS\system32\kxmixer.exe --startupO4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInitO4 - HKLM\..\Run: [WinampAgent] C:\Program\Winamp\winampa.exeO4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program\Java\jre1.6.0_05\bin\jusched.exe"O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXEO4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXEO4 - HKLM\..\Run: [8169Diag] C:\Program\Realtek\Diagnostics Utility\8169Diag /hwO4 - HKCU\..\Run: [uTorrent] "C:\Program\uTorrent\uTorrent.exe"O4 - HKCU\..\Run: [Skype] "C:\Program\Skype\Phone\Skype.exe" /nosplash /minimizedO4 - HKCU\..\Run: [WeatherWatcher] C:\Program\Weather Watcher\ww.exeO4 - HKCU\..\Run: [swg] C:\Program\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exeO4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program\Spybot - Search & Destroy\TeaTimer.exeO4 - HKCU\..\Run: [PC Suite Tray] "C:\Program\Nokia\Nokia PC Suite 6\PCSuite.exe" -onlytrayO4 - HKCU\..\Run: [Nokia.PCSync] "C:\Program\Nokia\Nokia PC Suite 6\PCSync2.exe" /NoDialogO4 - HKUS\S-1-5-19\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'LOKAL TJÄNST')O4 - HKUS\S-1-5-20\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'NETWORK SERVICE')O4 - HKUS\S-1-5-18\..\Run: [Nokia.PCSync] "C:\Program\Nokia\Nokia PC Suite 6\PcSync2.exe" /NoDialog (User 'SYSTEM')O4 - HKUS\S-1-5-18\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'SYSTEM')O4 - HKUS\.DEFAULT\..\Run: [Nokia.PCSync] "C:\Program\Nokia\Nokia PC Suite 6\PcSync2.exe" /NoDialog (User 'Default user')O4 - HKUS\.DEFAULT\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'Default user')O4 - Startup: RivaTuner.lnk = C:\Program\RivaTuner\RivaTuner.exeO4 - Startup: Trillian.lnk = C:\Program\Trillian\trillian.exeO4 - Global Startup: BTTray.lnk = ?O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions presentO8 - Extra context menu item: Bifoga till befintlig PDF - res://C:\Program\Adobe\Acrobat\Acrobat\AcroIEFavClient.dll/AcroIEAppend.htmlO8 - Extra context menu item: E&xportera till Microsoft Excel - res://C:\Program\Microsoft Office\Office12\EXCEL.EXE/3000O8 - Extra context menu item: Konvertera länkmål till Adobe PDF - res://C:\Program\Adobe\Acrobat\Acrobat\AcroIEFavClient.dll/AcroIECapture.htmlO8 - Extra context menu item: Konvertera länkmål till befintlig PDF - res://C:\Program\Adobe\Acrobat\Acrobat\AcroIEFavClient.dll/AcroIEAppend.htmlO8 - Extra context menu item: Konvertera markering till Adobe PDF - res://C:\Program\Adobe\Acrobat\Acrobat\AcroIEFavClient.dll/AcroIECapture.htmlO8 - Extra context menu item: Konvertera markering till befintlig PDF - res://C:\Program\Adobe\Acrobat\Acrobat\AcroIEFavClient.dll/AcroIEAppend.htmlO8 - Extra context menu item: Konvertera till Adobe PDF - res://C:\Program\Adobe\Acrobat\Acrobat\AcroIEFavClient.dll/AcroIECapture.htmlO8 - Extra context menu item: Konvertera valda länkar till Adobe PDF - res://C:\Program\Adobe\Acrobat\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.htmlO8 - Extra context menu item: Konvertera valda länkar till befintlig PDF - res://C:\Program\Adobe\Acrobat\Acrobat\AcroIEFavClient.dll/AcroIEAppendSelLinks.htmlO8 - Extra context menu item: Skicka till &Bluetooth-enhet... - C:\Program\WIDCOMM\Bluetooth Software\btsendto_ie_ctx.htmO8 - Extra context menu item: Skicka till Bluetooth - C:\Program\WIDCOMM\Bluetooth Software\btsendto_ie.htmO9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program\Java\jre1.6.0_05\bin\ssv.dllO9 - Extra 'Tools' menuitem: Sun Java-konsol - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program\Java\jre1.6.0_05\bin\ssv.dllO9 - Extra button: Skicka till OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\Program\Microsoft Office\Office12\ONBttnIE.dllO9 - Extra 'Tools' menuitem: Ski&cka till OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\Program\Microsoft Office\Office12\ONBttnIE.dllO9 - Extra button: Skype - {77BF5300-1474-4EC7-9980-D32B190E9B07} - C:\Program\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dllO9 - Extra button: @btrez.dll,-4015 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program\WIDCOMM\Bluetooth Software\btsendto_ie.htmO9 - Extra 'Tools' menuitem: @btrez.dll,-12650 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program\WIDCOMM\Bluetooth Software\btsendto_ie.htmO9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\Program\Spybot - Search & Destroy\SDHelper.dllO9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\Program\Spybot - Search & Destroy\SDHelper.dllO15 - ESC Trusted Zone: http://runonce.msn.comO16 - DPF: {5BF56AD2-E297-416E-BC49-00B304040507} - https://cve.trust.telia.com/testa/iidsetup.cabO16 - DPF: {66D393D5-4D80-497C-9F4F-F3839E090202} (PlayerOCX Control) - http://www.pysoft.com/Downloads/WebCamPlayerOCX.cabO16 - DPF: {67A5F8DC-1A4B-4D66-9F24-A704AD929EEE} (System Requirements Lab) - http://www.systemrequirementslab.com/sysreqlab2.cabO18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\Program\Microsoft Office\Office12\GrooveSystemServices.dllO18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\Program\DELADE~1\Skype\Skype4COM.dllO20 - Winlogon Notify: hggghed - C:\WINDOWS\O23 - Service: Bluetooth Service (btwdins) - Broadcom Corporation. - C:\Program\WIDCOMM\Bluetooth Software\bin\btwdins.exeO23 - Service: CachemanXP (CachemanXPService) - Outertech - C:\Program\CACHEM~1\CachemanXP.exeO23 - Service: Eset HTTP Server (EhttpSrv) - ESET - C:\Program\NOD32 Antivirus\EHttpSrv.exeO23 - Service: Eset Service (ekrn) - ESET - C:\Program\NOD32 Antivirus\ekrn.exeO23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program\Delade filer\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exeO23 - Service: Google Updater Service (gusvc) - Google - C:\Program\Google\Common\Google Updater\GoogleUpdaterService.exeO23 - Service: Intel(R) Matrix Storage Event Monitor (IAANTMON) - Intel Corporation - C:\Program\Intel\Intel Matrix Storage Manager\Iaantmon.exeO23 - Service: Nero BackItUp Scheduler 3 - Nero AG - C:\Program\Nero\Nero8\Nero BackItUp\NBService.exeO23 - Service: NMIndexingService - Nero AG - C:\Program\Delade filer\Nero\Lib\NMIndexingService.exeO23 - Service: NVIDIA-OMEGA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exeO23 - Service: PD91Agent - Raxco Software, Inc. - C:\Program\Raxco PerfectDisk 2008\PD91Agent.exeO23 - Service: PD91Engine - Raxco Software, Inc. - C:\Program\Raxco PerfectDisk 2008\PD91Engine.exeO23 - Service: PD91VMDefrag - Raxco Software, Inc. - C:\Program\Raxco PerfectDisk 2008\PD91VMDefrag.exeO23 - Service: ServiceLayer - Nokia. - C:\Program\PC Connectivity Solution\ServiceLayer.exeO23 - Service: VMware Agent Service (ufad-ws60) - VMware, Inc. - C:\Program\VMware\VMware Workstation\vmware-ufad.exeO23 - Service: VMware Authorization Service (VMAuthdService) - VMware, Inc. - C:\Program\VMware\VMware Workstation\vmware-authd.exeO23 - Service: VMware DHCP Service (VMnetDHCP) - VMware, Inc. - C:\WINDOWS\system32\vmnetdhcp.exeO23 - Service: VMware Virtual Mount Manager Extended (vmount2) - VMware, Inc. - C:\Program\Delade filer\VMware\VMware Virtual Image Editing\vmount2.exeO23 - Service: VMware NAT Service - VMware, Inc. - C:\WINDOWS\system32\vmnat.exe-- Link to comment Share on other sites More sharing options...
Firon Posted May 14, 2008 Report Share Posted May 14, 2008 Have you tried uninstalling NOD32, as a test? It'll just help rule out possibilities. Link to comment Share on other sites More sharing options...
n00dled00d Posted May 14, 2008 Author Report Share Posted May 14, 2008 Just did, didn't help. Added: I found a workaround. Although I have no explanation why it works, if it has any bad side-effects or if it affects the speed.I used TCP optimizer and changed the MTU from the default 1500 in windows to 1430.Anyone care to elaborate on this? Link to comment Share on other sites More sharing options...
Switeck Posted May 14, 2008 Report Share Posted May 14, 2008 Speculation:If you are on ADSL, then the largest packet size that ADSL can handle is typically smaller than 1500 bytes. So if your MTU is set to 1500 bytes, then any packets larger than the ADSL can handle gets fragmented...possibly improperly. Maybe the too-large packets are failing to get through your line because they AREN'T fragmented, but instead simply dropped? Or an oversided packet causes a buffer overrun or something equally nasty in the modem's hardware.By setting MTU lower, the problem doesn't occur.Generally (but not always) Cable ISPs use MTU values of 1500 bytes, the same as 10/100 ethernet. Link to comment Share on other sites More sharing options...
n00dled00d Posted May 14, 2008 Author Report Share Posted May 14, 2008 I'm not on either cable nor xDSL, I'm on ethernet with no modem or anything. The only explanation would be that I'm overloading and causing a buffer overrun in the ISP's router. Still, that doesn't explain why it suddenly stopped working one day when it worked beautifully before, why my laptop that has an untouched MTU has no problems and how it's possible for virtual machines with an unchanged MTU work with bittorrents when the host machine cannot.Added: Just to try it out, I changed the MTU to 1500 (which I assume is the default MTU in Windows?) and rebooted. It's working fine now! The only conclusion I have is that something changed the MTU to a non-standard value at some point yesterday around 4 pm. I'm still eager to hear any plausible explanation for this though.. I haven't came across a bigger mystery since a few years back when a friend couldn't surf homepages that were running the MS IIS webserver, everything else was working fine. Turned out there was something wrong with his modem.. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.