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Re: [Openvpn-users] Connection resetting on very large file transfers


  • Subject: Re: [Openvpn-users] Connection resetting on very large file transfers
  • From: Jean-Pierre Schwickerath <lists@xxxxxxxxxxxx>
  • Date: Thu, 2 Sep 2004 13:29:25 +0200

Hello Everyone!

> Should the mssfix/fragment values be set lower than
> the mtu-test returned value to be safe?

This makes me think of a problem which I've had some time ago. 
I noticed that large transfers over OpenVPN tunnels could not be
performed when either the server or the client was using the
adsl-services of a particular ISP (or both). After some testing I
required these people to use mssfix and fragment of about 1350 as this
was the biggest size links had shown to remain stable. 
Now, I just tested it again and the problem remains. 

My question is: Is there any way to find out which particular router on
the way between client and server is actually failing the automatic
setting of the mtu-size or which one is actually requiring this small
packet size?


Jean-Pierre

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