OpenVPN Support Forum

Hi, I'm setting up openvpn on a LAN to encrypt the stuff that is being send between 2 pcs.
Both machines are running Vista.
They both have gigabit ethernet but I'm only getting 100-150mbit out of the connection.
I've disabled both authentication and cypher to test the tunneling speed (which is 100-150mbit).
I've tried playing around with mtu settings but no luck so far.

Is there anything I can do to further tweak the settings to gain performance?

server config: http://pastebin.com/m3397b006
client config: http://pastebin.com/m29f6b62d

i was just reading about stuff related to this last night... this is a somewhat common topic on the mail list. I am going to guess this has to do with the windows tap driver since even the developer (back in openvpn 1.5 or so) got very different figures in his tests when using linux vs windows.
I would be interested in hearing how your results vary if you were to load linux on 2 machines on that lan and retest. if doing such benchmarks it is useful to do them these 4 ways:
1) without openvpn at all
2) with no encryption
3) with pre-shared key encryption
4) with blowfish encryption

and with varying operating systems.

then you can just transfer a large file (maybe 80MB or so since you have gigabit) over something raw like ftp (not samba, not sftp).

You could also try playing with mtu settings.