Re: [Openvpn-users] Performance issues (WinXP -> WinXP) with TCP, but not UDP

[Jon Bendtsen <jon.bendtsen@xxxxxxxxxx>]

Den tirsdag 3.jan kl. 5:09 skrev Brian Dignan:

> I just got OpenVPN setup last night on my two Windows XP machines,  
> and I'm having throughput issues when I use TCP encapsulation, but  
> not with UDP encapsulation. Here are the details:

TCP ontop of TCP is a bad idea. Use UDP tunnels


> I have two PCs configured with OpenVPN that share the same subnet  
> on a single gigabit ethernet switch. The server's IP is 192.168.0.1  
> and the client's IP is 192.168.0.210. I tested throughput by  
> copying a 62.8 MB file in three different configurations.
>
> 1) With no tunnel. The file transfer took about 2 seconds, which is  
> roughly 32Mbps
>
> 2) With a UDP tunnel with no encryption. The file transfer took 18  
> seconds, which is about 3.65Mbps.
>
> 3) With a TCP tunnel with no encryption. The file transfer took 370  
> seconds, which is about 177Kbps.

Try checking with a network sniffer that the packet sizes are not too  
big,
and then try fiddling with the packet size.


JonB

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