New Modem-MTU-MSS help

anderb · Post by **anderb** » Mon Apr 27, 2009 10:51 am

Hello friends I´ve bought a new modem intelbras.But the mtu/mss values are not ok according to speedguide,follow the results.I have 1500kbps down/300kbpsup

vista ultimate,I checked and in the modem mtu setting is 1500,but on the test result shows 1392.
« SpeedGuide.net TCP Analyzer Results »
Tested on: 04.27.2009 10:48
IP address: 201.66.xxx.xxx
Client OS: Windows Vista

TCP options string: 020405480103030201010402
MSS: 1352
MTU: 1392
TCP Window: 66248 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16562
Recommended RWINs: 64896, 129792, 259584, 519168, 1038336
BDP limit (200ms): 2650kbps (331KBytes/s)
BDP limit (500ms): 1060kbps (132KBytes/s)
MTU Discovery: ON
TTL: 106
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Rollingstone · Post by **Rollingstone** » Mon Apr 27, 2009 7:05 pm

Try the following with TCP Optimizer and see if MTU will change:

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU - 1500
TTL - 64
Windows Scaling - uncheck
TCP Receive Window - leave blank
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Timestamps - uncheck

Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 10
LocalPriority - 5
Host Priority - 6
DNSPriority - 7
NetbtPriority - 8
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768

anderb · Post by **anderb** » Mon Apr 27, 2009 7:23 pm

thanks rollingstone for your attention,I applied vista patch,(cause I don´t know if tcp optimizer works with vista)follow the results
« SpeedGuide.net TCP Analyzer Results »
Tested on: 04.27.2009 19:21
IP address: 201.66.xxx.xxx
Client OS: Windows Vista

TCP options string: 020405480103030201010402
MSS: 1352
MTU: 1392
TCP Window: 66248 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16562
Recommended RWINs: 64896, 129792, 259584, 519168, 1038336
BDP limit (200ms): 2650kbps (331KBytes/s)
BDP limit (500ms): 1060kbps (132KBytes/s)
MTU Discovery: ON
TTL: 42
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Rollingstone · Post by **Rollingstone** » Mon Apr 27, 2009 11:57 pm

I applied vista patch,(cause I don´t know if tcp optimizer works with vista)

TCP Window in Vista cannot be tweaked with TCP OPtimizer but in some cases, it's used for increasing MTU !

MTU: 1392
I´ve bought a new modem intelbras

Have you updated modem firmware ?

anderb · Post by **anderb** » Tue Apr 28, 2009 8:33 am

Rollingstone wrote:TCP Window in Vista cannot be tweaked with TCP OPtimizer but in some cases, it's used for increasing MTU !

Have you updated modem firmware ?

on vista tweaks thread,I´ve read about checking you MTU value through cmd prompt
netsh interface ipv4 show subinterface
in mine shows 150

anderb · Post by **anderb** » Tue Apr 28, 2009 10:01 am

anderb wrote:on vista tweaks thread,I´ve read about checking you MTU value through cmd prompt
netsh interface ipv4 show subinterface
in mine shows 1500,I´ve applied tcpoptimizer but it didn´t change MTU value,and I also updated the firmware

thanks for your patience rollingstone

Rollingstone · Post by **Rollingstone** » Tue Apr 28, 2009 10:09 am

new modem intelbras

Do you have its lastest firmware for Vista ?

anderb · Post by **anderb** » Tue Apr 28, 2009 10:48 am

Rollingstone wrote:Do you have its lastest firmware for Vista ?

how can I check this?
but my speed is ok rollingstone,I was wondering if these MTU/MSS values are so important..

tracert to yahoo.com
Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\Andy>tracert http://www.yahoo.com

Tracing route to www-real.wa1.b.yahoo.com [209.191.93.52]
over a maximum of 30 hops:

1 1 ms 1 ms 1 ms 192.168.1.1
2 23 ms 23 ms 27 ms BrT-L10-cslce701.dsl.brasiltelecom.net.br [201.1
4.221.254]
3 164 ms 163 ms 161 ms BrT-G2-1-mianaborder.brasiltelecom.net.br [201.1
0.251.242]
4 160 ms 161 ms 159 ms BrTC-G1-2-mianaborder.brasiltelecom.net.br [201.
10.242.6]
5 189 ms 191 ms 191 ms so-1-1-0.pat1.da3.yahoo.com [216.115.101.0]
6 192 ms 191 ms 191 ms ae2-p120.msr1.mud.yahoo.com [216.115.104.89]
7 196 ms 193 ms 191 ms te-9-1.bas-c1.mud.yahoo.com [68.142.193.9]
8 194 ms 195 ms 193 ms f1.http://www.vip.mud.yahoo.com [209.191.93.52]

Trace complete.

Rollingstone · Post by **Rollingstone** » Tue Apr 28, 2009 10:53 am

Tracert looks good !

how can I check this?

Check http://radasync.com/

anderb · Post by **anderb** » Tue Apr 28, 2009 1:07 pm

Rollingstone wrote:Tracert looks good !

Check http://radasync.com/

I followed a tutorial about configuring this modem in router mode and now here are the results
« SpeedGuide.net TCP Analyzer Results »
Tested on: 04.28.2009 13:01
IP address: 201.35.xxx.xxx
Client OS: Windows Vista

TCP options string: 020405840103030201010402
MSS: 1412
MTU: 1452
TCP Window: 66364 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16591
Recommended RWINs: 64952, 129904, 259808, 519616, 1039232
BDP limit (200ms): 2655kbps (332KBytes/s)
BDP limit (500ms): 1062kbps (133KBytes/s)
MTU Discovery: ON
TTL: 42
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

what do you think

Rollingstone · Post by **Rollingstone** » Tue Apr 28, 2009 6:13 pm

MTU: 1452

Are you VPN or something like that ?

anderb · Post by **anderb** » Wed Apr 29, 2009 7:21 am

Rollingstone wrote:Are you VPN or something like that ?

I don´t think so,one more question,I´ve tested my modem on shields up website,and it failed,all ports closed,some stealth,but they received ping replies,I tried everything but I can´t figure it out,how to set up this modem to avoid ping replies

I think I´ll have to use it in bridge mode,what do you think rollingstone?
Thanks

Rollingstone · Post by **Rollingstone** » Wed Apr 29, 2009 9:48 am

Download HijackThis and post HijackThis log.

anderb · Post by **anderb** » Wed Apr 29, 2009 11:57 am

Rollingstone wrote:Download HijackThis and post HijackThis log.

Thanks again,follow the results
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 12:55:06, on 29/04/2009
Platform: Windows Vista SP1 (WinNT 6.00.1905)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
Boot mode: Normal

Running processes:
C:\Windows\system32\taskeng.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Windows\System32\rundll32.exe
C:\Program Files\Ashampoo\Ashampoo Magical Defrag 2\bin\defragTaskBar.exe
C:\Program Files\G Data\TotalCare\Firewall\GDFirewallTray.exe
C:\Program Files\G Data\TotalCare\AVKTray\AVKTray.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Program Files\Ashampoo\Ashampoo Magical Defrag 2\bin\defragMonitorService.exe
C:\Program Files\Ashampoo\Ashampoo Magical Defrag 2\bin\defragActivityMonitor.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Windows\system32\wbem\unsecapp.exe
D:\MEUS DOWNLOADS\HiJackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.banrisul.com.br/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O1 - Hosts: ::1 localhost
O2 - BHO: G Data WebFilter Class - {0124123D-61B4-456f-AF86-78C53A0790C5} - C:\Program Files\G Data\TotalCare\Webfilter\AvkWebIE.dll
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O3 - Toolbar: G Data WebFilter - {0124123D-61B4-456f-AF86-78C53A0790C5} - C:\Program Files\G Data\TotalCare\Webfilter\AvkWebIE.dll
O4 - HKLM\..\Run: [P17RunE] RunDll32 P17RunE.dll,RunDLLEntry
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\Windows\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [DefragTaskBar] "C:\Program Files\Ashampoo\Ashampoo Magical Defrag 2\bin\defragTaskBar.exe"
O4 - HKLM\..\Run: [GDFirewallTray] C:\Program Files\G Data\TotalCare\Firewall\GDFirewallTray.exe
O4 - HKLM\..\Run: [G DATA AntiVirus Trayapplication] C:\Program Files\G Data\TotalCare\AVKTray\AVKTray.exe
O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
O4 - HKUS\S-1-5-19\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-19\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'NETWORK SERVICE')
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\Office12\REFIEBAR.DLL
O13 - Gopher Prefix:
O16 - DPF: {0E5F0222-96B9-11D3-8997-00104BD12D94} (PCPitstop Utility) - http://www.pcpitstop.com/betapit/PCPitStop.CAB
O17 - HKLM\System\CCS\Services\Tcpip\..\{45B031BB-16E7-4A5E-86AD-37C87004209F}: NameServer = 201.10.1.2,201.10.120.3
O17 - HKLM\System\CCS\Services\Tcpip\..\{5607B262-4431-4421-9F51-ED0CE826DCFD}: NameServer = 201.10.1.2 201.10.120.3
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: NameServer = 127.0.0.1
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: NameServer = 127.0.0.1
O22 - SharedTaskScheduler: Windows DreamScene - {E31004D1-A431-41B8-826F-E902F9D95C81} - C:\Windows\System32\DreamScene.dll
O23 - Service: Ashampoo Defrag Service (AshampooDefragService) - - C:\Program Files\Ashampoo\Ashampoo Magical Defrag 2\bin\aDefragService.exe
O23 - Service: G Data AntiVirus Proxy (AVKProxy) - G Data Software AG - C:\Program Files\Common Files\G DATA\AVKProxy\AVKProxy.exe
O23 - Service: G Data Scheduler (AVKService) - G Data Software AG - C:\Program Files\G Data\TotalCare\AVK\AVKService.exe
O23 - Service: G Data Filesystem Monitor (AVKWCtl) - G Data Software AG - C:\Program Files\G Data\TotalCare\AVK\AVKWCtl.exe
O23 - Service: G Data Personal Firewall (GDFwSvc) - G Data Software AG - C:\Program Files\G Data\TotalCare\Firewall\GDFwSvc.exe
O23 - Service: G Data Scanner (GDScan) - G DATA Software AG - C:\Program Files\Common Files\G DATA\GDScan\GDScan.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\Windows\system32\nvvsvc.exe
O23 - Service: @%SystemRoot%\System32\TuneUpDefragService.exe,-1 (TuneUp.Defrag) - TuneUp Software - C:\Windows\System32\TuneUpDefragService.exe
O23 - Service: @%SystemRoot%\System32\TUProgSt.exe,-1 (TuneUp.ProgramStatisticsSvc) - TuneUp Software - C:\Windows\System32\TUProgSt.exe

--
End of file - 5202 bytes

Rollingstone · Post by **Rollingstone** » Wed Apr 29, 2009 6:34 pm

O23 - Service: @%SystemRoot%\System32\TUProgSt.exe,-1 (TuneUp.ProgramStatisticsSvc) - TuneUp Software - C:\Windows\System32\TUProgSt.exe

What MTU value have you entered in Tuneup 's Internet Settings ?

anderb · Post by **anderb** » Wed Apr 29, 2009 7:02 pm

Rollingstone wrote:What MTU value have you entered in Tuneup 's Internet Settings ?

I didn´t use tuneup utlilites to tweak the internet connection,I´ve followed a tutorial on how to route a modem.I even tried to put 1500 on the field,but it didn´t change the mtu value.

Is my log clean rollingstone?
thank you again

Rollingstone · Post by **Rollingstone** » Wed Apr 29, 2009 10:46 pm

anderb wrote:I even tried to put 1500 on the field,but it didn´t change the mtu value

I think your MTU limitation caused by your modem !

Is my log clean rollingstone?

It's Ok ! But Sidebar & Firewall has tendency to slow down your comp !

anderb · Post by **anderb** » Thu Apr 30, 2009 7:18 am

Rollingstone wrote:I think your MTU limitation caused by your modem !

It's Ok ! But Sidebar & Firewall has tendency to slow down your comp !

I know that,but I can´t live without them,lol

Thanks for your help.
God bless you