Second OpenVPN Server
I currently use an OpenVPN server that utilizes udp/1194. This VPN connection works perfectly, including cn matching and LDAP group membership. I've decided to create a second VPN for users that need to connect from a device not owned by our company, and therefore not controlled by our security apps. This VPN uses udp/1195.
I'm finding that I am unable to complete the connection on the 1195 configuration, even though it is an exact copy (with the exception of the port) of the working 1194 config. The error I'm seeing is:
Fri Apr 08 14:44:45 2016 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Fri Apr 08 14:44:45 2016 TLS Error: TLS handshake failed
Fri Apr 08 14:44:45 2016 SIGUSR1[soft,tls-error] received, process restarting
I can see the packets reaching the firewall on the WAN interface, but nothing is sent back. Logging the ACL shows that the traffic is passed. This is leading me to believe I'm running into a certificate issue, but I'm utilizing the same user certificates (InternalVPNCA) that work on 1194. Any ideas what I might be doing wrong?
I've decided to create a second VPN for users that need to connect from a device not owned by our company, and therefore not controlled by our security apps. This VPN uses udp/1195
There are a couple of places this can be problematic certificate wise.
I would suggest that the 2nd OpenVPN server needs it's own certificate.
As long as the new Cert. is created using the same CA used for the first server, you should be OK with your current setup.
You may need to enable "Allow Duplicate-cn" if you're trying to connect to both servers using the same client (that may or may not sense in your setup).
You might want to go so far as to create a new CA as well as a new server Cert for the second instance.
If you do, you'll need dedicated client certs for the 2nd server.
In many scenarios, that's a good thing (if only for enforcing separation of who's connecting and from where).