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Re: [Openvpn-users] vpn tunnel slow in one direction

  • Subject: Re: [Openvpn-users] vpn tunnel slow in one direction
  • From: Jan Just Keijser <janjust@xxxxxxxxx>
  • Date: Mon, 19 Nov 2007 11:59:27 +0100

could be lots of things:
- network assymetry (are you using ADSL lines?)
- local network load on one of the boxes
- check your network statistics when doing the transfer (netstat -s)

what is your *physical* network layout?



Matthias Teege wrote:
> On Nov 17, 2007 5:56 PM, Prasanna Krishnamoorthy <prasanna79@xxxxxxxxx> wrote:
>> Is one of the machines significantly slower at encryption performance
>> than the other?
> No both machines are equal and the load is near  zero. I made some
> more tests and
> it looks like an mtu problem. Here the transfer time for a 3MB
> testfile with different
> fragment settings. Mssfix is enabled.
> default: 263.11s
> 1400:102.34s
> 1350:75.24s
> 1300:112.73s
> 1200:39.33s, 45.50s, 30.68s
> 1100:20.70s, 28.43s, 24.74s
> 1000:92.67s, 107.50s,
> The other direction has constant between 14 and 15s which is ok I think.

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