[OpenVPN client] TAP-WIn32 speed

tchangz

Hi,

I am working with a Windows XP pro SP3 OS.
My OpenVPN server : OpenVPN 2.0.6 i386-portbld-freebsd7.2
My OpenVPN client : OpenVPN 2.1.4 i686-pc-mingw32

My connection between the client and the server works fine.
However my virtual interface on the XP box allow 10Mbps max and I need speeder.
This virtual adaptater is : TAP-Win32 Provider V9
I searched different ways to solve this problem...unsuccessfuly.

Is there any solution in order to permit a larger speed on the virtual interface?

Have a nice day.

hadeor

Hey,
The 10Mbps speed for the virtual adapter is not the maximum, it doesn't effect the real speed. Afaik it's just a legacy parameter from the physical ethernet devices.

Hadeor

tchangz

Hi,

Thank you for your response.
My Internet BW is 30Mbps. During my tests I curiously can't exceed 10Mbps through the openvpn client connection.
Could you communicate your/a (official) informaration source?

Cordially.

janjust

I've ran OpenVPN on windows at much higher speeds than 10 Mbps without any issues. The 10Mbps mentioned by the adapter is just a number specified in the TAP-Win32 driver - there is no limit set within the driver itself. You can read the sources of the TAP-Win32 adapter to see this for yourself.

Your OpenVPN server (2.0.6 on freebsd) is poorly supported - is there any way to upgrade?

Getting 10 Mbps performance over a 30 Mbps internet connection using a windows OpenVPN client is not too bad - it depends a bit on your settings and your vpn setup. If you are using OpenVPN over tcp then you could try adding

  tcp-nodelay

to see if that improves things.

Posting your client and server config will also help.

HTH,

JJK

PhoenixOrion

That's funny because I'm limited to around 10Mbs as well with openvpn client on the computer as well and with L2tp I get around 33-36mbs down and with pptp I get between 31-34mbs down and with a regular connection I get 37-38mbs on speedtest.net servers. I think you've been lied to or It's some kind of glitch that only happens to some people because of the crappy Tap win32 tunnel adapter it is old and they should write a whole new virtual adapter tunnel for openvpn!