How is it possible ?

piranha · Post by **piranha** » Mon Mar 31, 2008 7:29 pm

tech support of my cable ISP suggest me to use a mtu of 1496. TcpOptimizer confirm the 1496 mtu. I set the mtu in windows xp (with Cablenut) and for my router (yes i did save...) to 1496 and still got these result

« SpeedGuide.net TCP Analyzer Results »
Tested on: 03.31.2008 19:17
IP address: xxx.xxx.xxx.xxx

TCP options string: 020405b40103030401010402
MSS: 1460
MTU: 1500

I really dont understand....

Explain

solutions ?

trogers · Post by **trogers** » Mon Mar 31, 2008 10:30 pm

MTU for cable internet should be 1500, not 1496.

piranha · Post by **piranha** » Tue Apr 01, 2008 6:43 pm

trogers wrote:MTU for cable internet should be 1500, not 1496.

I already know that but my ISP limits the mtu. I know too it is rare with cable but it is confirm by tcpoptimizer largest mtu test

Just dont understand why i set all to 1496 and my analyser result show 1500 ???

Rollingstone · Post by **Rollingstone** » Tue Apr 01, 2008 7:59 pm

i set all to 1496 and my analyser result show 1500

Is your browser configured to use a proxy ?

Post your HijackThis Log.

piranha · Post by **piranha** » Tue Apr 01, 2008 8:49 pm

Rollingstone wrote:Is your browser configured to use a proxy ?

Post your HijackThis Log.

I use Firefox, no proxy settings

piranha · Post by **piranha** » Tue Apr 01, 2008 9:14 pm

Rollingstones

here is my HJT log. Couldnt be more clean....

******

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 21:10:30, on 2008-04-01
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\Eset\nod32kui.exe
C:\Program Files\Java\jre1.6.0_05\bin\jusched.exe
C:\Program Files\VMware\VMware Player\hqtray.exe
C:\Program Files\Soft4Ever\looknstop\looknstop.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Diskeeper Corporation\Diskeeper\DkService.exe
C:\Program Files\Eset\nod32krn.exe
C:\WINDOWS\system32\HPZipm12.exe
C:\Program Files\Fichiers communs\VMware\VMware Virtual Image Editing\vmount2.exe
C:\WINDOWS\system32\vmnat.exe
C:\WINDOWS\system32\vmnetdhcp.exe
C:\Program Files\VMware\VMware Player\vmware-authd.exe
C:\Program Files\HP\Digital Imaging\bin\hpqSTE08.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Firetrust\MailWasher Free\MailWasher.exe
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Hijackthis\HiJackThis_202.exe

R1 - HKCU\Software\Microsoft\Internet Explorer,(Default) = Download Directory
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.cyberpresse.ca/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O4 - HKLM\..\Run: [DiskeeperSystray] "C:\Program Files\Diskeeper Corporation\Diskeeper\DkIcon.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [nod32kui] "C:\Program Files\Eset\nod32kui.exe" /WAITSERVICE
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_05\bin\jusched.exe"
O4 - HKLM\..\Run: [VMware hqtray] "C:\Program Files\VMware\VMware Player\hqtray.exe"
O4 - HKLM\..\Run: [Look 'n' Stop] "C:\Program Files\Soft4Ever\looknstop\looknstop.exe" -auto
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Trace - {04849C74-016E-4a43-8AA5-1F01DE57F4A1} - C:\Program Files\VisualRoute\vrie.dll
O9 - Extra 'Tools' menuitem: VisualRoute Trace - {04849C74-016E-4a43-8AA5-1F01DE57F4A1} - C:\Program Files\VisualRoute\vrie.dll
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Run IMVU - {d9288080-1baa-4bc4-9cf8-a92d743db949} - C:\Documents and Settings\Admin\Menu Démarrer\Programmes\IMVU\Run IMVU.lnk
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O10 - Unknown file in Winsock LSP: c:\windows\system32\nwprovau.dll
O16 - DPF: {05CA9FB0-3E3E-4B36-BF41-0E3A5CAA8CD8} (Office Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=58813
O16 - DPF: {0A5FD7C5-A45C-49FC-ADB5-9952547D5715} (Creative Software AutoUpdate) - http://www.creative.com/su/ocx/15030/CTSUEng.cab
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/Shar ... vSniff.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupda ... 8736304190
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/Shar ... /cabsa.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://www.update.microsoft.com/microso ... 8251130202
O16 - DPF: {F6ACF75C-C32C-447B-9BEF-46B766368D29} (Creative Software AutoUpdate Support Package) - http://www.creative.com/su/ocx/15030/CTPID.cab
O20 - Winlogon Notify: !SASWinLogon - C:\Program Files\SUPERAntiSpyware\SASWINLO.dll
O23 - Service: Acronis Scheduler2 Service (AcrSch2Svc) - Acronis - C:\Program Files\Fichiers communs\Acronis\Schedule2\schedul2.exe
O23 - Service: Adobe LM Service - Adobe Systems - C:\Program Files\Fichiers communs\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\system32\CTsvcCDA.exe
O23 - Service: Diskeeper - Diskeeper Corporation - C:\Program Files\Diskeeper Corporation\Diskeeper\DkService.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: NOD32 Kernel Service (NOD32krn) - Eset - C:\Program Files\Eset\nod32krn.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: ServiceLayer - Nokia. - C:\Program Files\PC Connectivity Solution\ServiceLayer.exe
O23 - Service: VMware Authorization Service (VMAuthdService) - VMware, Inc. - C:\Program Files\VMware\VMware Player\vmware-authd.exe
O23 - Service: VMware DHCP Service (VMnetDHCP) - VMware, Inc. - C:\WINDOWS\system32\vmnetdhcp.exe
O23 - Service: VMware Virtual Mount Manager Extended (vmount2) - VMware, Inc. - C:\Program Files\Fichiers communs\VMware\VMware Virtual Image Editing\vmount2.exe
O23 - Service: VMware NAT Service - VMware, Inc. - C:\WINDOWS\system32\vmnat.exe

--
End of file - 7359 bytes

Rollingstone · Post by **Rollingstone** » Wed Apr 02, 2008 12:06 am

You used VM ware when posting TCP Analyzer ?

Try log into modem/router and set MTU (MRU) 1500 or MSS 1460.

piranha · Post by **piranha** » Wed Apr 02, 2008 9:32 am

I uninstalled VMware and got same results and got the same result too with the router mtu set to 1500

« SpeedGuide.net TCP Analyzer Results »
Tested on: 04.02.2008 09:20
IP address: xxx.xxx.xxx.xxx

TCP options string: 020405b40103030401010402
MSS: 1460
MTU: 1500

Mtu limit by my ISP is confirm by TcpOptimizer, have a look.....

trogers · Post by **trogers** » Wed Apr 02, 2008 9:42 am

1. Go to Start and select Run.
2. Type in cmd into the box and click OK. The DOS prompt black box should pop-up.
3. After C:\> type ping http://www.yahoo.com -f -l 1472 and hit the Enter key.

If there is no fragmentation, your MTU is 1500 (=1472+28).