Loopback-Connection

[sdfsdfsdf]

Hey there. I want to setup a OpenVPN server, but it seems like sth is wrong. To figure out the issue I'd like to be able to test config locally. So I want to connect a Client to a server on the same PC - is this somehow possible?
Up to now it seems like "local out port" must be the same as "remote in port", which would mean that loopback is not possible?!

[Mimiko]

It's possible, but you have to install two tun-adapters. And don't use lport on client.

[sdfsdfsdf]

ok, but how do i setup a 2nd TAP-Adapter? and what is lport?

[Mimiko]

Installing second TUN adapter http://answers.microsoft.com/en-us/wind ... 8576fdc6a7
lport: http://www.openvpn.net/index.php/open-s ... pn-21.html

[sdfsdfsdf]

ah, so if there are lport and rport, why cant I just use a rport for destination an another lport for source? this should work for loopback?!
I wonder why http://wiki.openvpn.eu/index.php/Erster_Tunnel suggests a tap for first tunnel uasage - loking at Forum rules this seems to be a bad idea somehow (would be nice to know why)?!
The thread you linked is about fixing a tun, not about installing it, is it?!
edit: semms like "Add a new TAP-Win32 virtual ethernet adapter" doesnt exist in my start menus openvpn folger?!

[Mimiko]

the virtual adapter can be TUN or TAP by the command you use in config file.
When installing tun adapter you give it a name. So you can give another name.
Just don't use rport and lport in your config files for server and client.

[sdfsdfsdf]

"When installing tun adapter" - well thats just the problem ^^ - In documentation it's said, that there should be a link in my start menu - which just is not there

If you are using Windows, each OpenVPN configuration needs to have its own TAP-Win32 adapter. You can add additional adapters by going to Start Menu -> All Programs -> OpenVPN -> Add a new TAP-Win32 virtual ethernet adapter.

[Mimiko]

The comand from start menu is for Microsoft's tun-adapter. The one used with openvpn must be started from a command line. Just browse to the tap driver folder and run:

Code: Select all

tapinstall install tap0

for adding a tap adapter 0, or tap1 for the following one.

[sdfsdfsdf]

it diddnt work directly, bu i managed to fix it.

now the server/client works - I restarted with sample config.
But i wonder about is:

the client gets IP .6 (every time), but in ipp.txt its logged as

clientname,10.8.0.4

?!

[Mimiko]

ipp.txt is not always updated imediatly upon client connected, its rather updated when client is disconnected.