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[Openvpn-users] Re: Heavy packet loss with high traffic

  • Subject: [Openvpn-users] Re: Heavy packet loss with high traffic
  • From: Eric Hokanson <hokanson@xxxxxxxxx>
  • Date: Mon, 20 Dec 2004 11:58:27 -0700

>>Terry Dooher said:
>>If not then it could be the adaptive retransmission timeout of the TCP
>>connection failing:
>> Take a look at this page for a description of the issue:
>> http://sites.inka.de/sites/bigred/devel/tcp-tcp.html
>> I should say that I've never seen anyone actually having this issue
>> before,
>> but it might be the cause. Sadly, the only way around this is to switch to
>> UDP, which you can't do.

>I have, using ppp over ssh. It definately is a problem you can encounter
>and this sounds just like it.
>Unfortunately, as Terry noted, there is not much you can do about that, if
>this is your problem. Maybe you can use VNC or something like that to use
>the tcp connection in a different way and scratch the VPN approach al
>P.S. You could tunnel your traffic over UDP based DNS, searching for an
>implementation on google is left as an exercise for the interested reader

I came across the page listed above while looking for a solution on
Google.  Was a bit discouraging :-(.  I also thought about a UDP over
DNS solution, however as I mentioned above ALL udp packets are
blocked, including UDP DNS.

Eric Hokanson

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