Re: [Openvpn-users] openvpn speed

[Jan J. K. <ja...@ni...>]

Kosztyu András wrote:
> Thank you for your answers,
> Yes i am aware of the issues with tcp over tcp however my setup will be using http proxy, so udp is unfortunately out of question. 
> tcp-queue-limit and txqueuelen didnt really have any effect, just forgot to remove after testing them. 
> Using TUN instead of TAP gave marginal change. 
>
> I was just hoping there is a magic trick, that would somehow negate this 80% speed decrease :) 
>
>
>   
just tried a couple of things with my linux FC12 laptop to a CentOS5 
server, connected via a 100 Mbps switch.
All tests are done using 'iperf -c <vpn-ip>  -p 20001 -f M -P 1'

direct:  11.3 MB/s
openvpn-over-tcp: 10.5 MB/s
openvpn-over-socks: 9.4 MB/s

I have not yet been able to run it over an HTTP proxy ;

also note that the speed of the windows client is severely affected by 
the logging level: try running with 'log 0' to see if it makes a difference.

HTH,

JJK

> -----Original Message-----
> From: Rob MacGregor [mailto:rob...@gm...] 
> Sent: Friday, March 26, 2010 1:26 PM
> To: ope...@li...
> Subject: Re: [Openvpn-users] openvpn speed
>
> 2010/3/26 Kosztyu András <kos...@vi...>:
>   
>> Hi,
>>
>> I have a setup which allows me to use internet freely from a http proxy only
>> restricted intranet. You know, the usual... The client (C2Q Q6600, 4gb mem)
>> has 60mbit/10mbit , the server (C2D E8500, 4gb mem) has 1gbit/1gbit internet
>> connection.
>>
>>     
> <---SNIP--->
>   
>> So the question is: is there any way to get a better performance in terms of
>> speed?
>>     
>
> Start by using UDP instead of TCP - TCP over TCP has known problems
> (and that's mentioned in the OpenVPN documentation).
>
>