Dual WAN and OpenVPN

[oldgringo]

I have N66 with two wan lines - dsl line and cable connection. There is a public IP address on dsl so I'd like to run OpenVPN server there. Cable connection doesn't have public IP address. Is there any possibility to set up the router to use only dsl line for vpn server? Without such setting the connection to vpn server is unstable because of TLS handshake on the other interface is broken. I've tried to untick the Enable VPN + DHCP Connection on cable interface but nothing has changed. Is there any possibility to set up special routing rules for the purpose? Thanks.

 

[oldgringo]

I found out a solution for openvpn with dual wan in openvpn manual - server directive multihome. Now the server is stable again.
My suggestion - this could be a part of the web interface, it should be visible if dual wan is enabled.

 

[RMerlin]

I found out a solution for openvpn with dual wan in openvpn manual - server directive multihome. Now the server is stable again.
My suggestion - this could be a part of the web interface, it should be visible if dual wan is enabled.

Checking on the documentation for this setting - I see a lot of "gotchas" associated to it. For instance it won't work properly on older kernels when using both IPv4 and IPv6. Also of note, the setting is only necessary when using UDP. So in the end this setting might still leave users with issues - best to recommend them to switch to TCP instead.