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[Openvpn-users] Re: OpenVPN Server Performance (real experience)


  • Subject: [Openvpn-users] Re: OpenVPN Server Performance (real experience)
  • From: Dale <d.schultz@xxxxxxxxxx>
  • Date: Wed, 1 Mar 2006 13:45:30 +0000 (UTC)

Dale <d.schultz <at> telesat.ca> writes:

> 
> Charles Duffy <cduffy <at> spamcop.net> writes:
> > I'd be interested to see what exactly your system is actually doing 
> > that's throttling the CPU. Perhaps you could use oprofile to find out if 
> > it's spending its time inside OpenSSL (which is the only *legitimate* 
> > place for it to be) or somewhere else.
> > 
> I can look at tusing that tool, thanks.  I just want to be clear though, I'm 
> only having CPU load issues when the network has to re-establish all the 
> tunnels with the remotes.  I have no problems once the tunnels are up.  The 
> CPU with 200+ tunnels running is very low in normal operating mode.  The 
> highest I see it go is 10%, and that is when the reneg kicks in.  I need to 
> look at the reneg option too, I'd like to get away from the 3600 seconds 
> thing.  Can I use both reneg on a packet count and on time together?  Such 
> that if the packet limit is not reached before the time period then the time 
> cause a reneg?
> 
> Thanks

Hi: Does anyone know the affect of using dh4096.pem on tunnel establishment 
compared to n=1024 or n=2048?  I didn't create this server but I did find out 
that we are using n=4096 and it took three days to generate the DH parameters 
on this server (3GHz Intel Xeon).


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