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Microsoft VPN client connected to SBS 2003  drops without error

Posted on 2006-11-11
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Last Modified: 2012-05-05
I have a Windows XP MS VPN client connected to Small Business Server (SBS) 2003.  The connection holds for several minutes, then disconnects without any error.  It doesn't seem to matter what app (such as Remote Desktop Connection, Outlook client, etc) is using it, or nothing at all.  It appears fully functional (can see resources etc).  The server is connected to the internet via a broadband connection (1.5MB upstream, 3MB downstream).  Does the server side log file say why the connection terminates?  Is there a decoder for the log entries?  Thanks.
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Question by:jwyatthopkins
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by:Jeffrey Kane - TechSoEasy
ID: 17927363
It's most likely a mismatch of MTU settings.  Be sure that your remote router is set to use 1492 and not the usual default of 1500.  (You should check to see that the server side MTU is no more than 1492 as well).

Jeff
TechSoEasy
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by:jwyatthopkins
ID: 18015771
I have the following connection

XP SP2 -> MS VPN client -> Watchguard SOHO6 -> Watchguard SOHO6 -> SBS 2003 VPN R&R.

Should the MTU be changed in the Watchguard (s) ?  And in the Remote Access server?

Thanks,
Jon

Sorry for the delay - there's usually an email tickler when an update comes in.
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Jeffrey Kane - TechSoEasy earned 2000 total points
ID: 18016587
You should find just about everything you need for MTU settings here:  http://www.howtonetworking.com/VPN/mtu1.htm

Jeff
TechSoEasy
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