Thank you for helpfully information!Yes, I'm using it successfully installed on the same machine. You will need to create a SIP profile that will accept connections on the same interface as the OpenVPN ip. It is very useful to have this, specially in some cases SIP phones are blocked by the internet provider and it works well through VPN.
Do I need to set some static route on debian for openvpn subnet?You can basically duplicate the "internal" profile and then set the: ext-rtp-ip, ext-sip-ip, rtp-ip, sip-ip to the ip of the VPN server (ex. if you use 10.8.0.0/24 network then the ip would be 10.8.0.1). Restart freeswitch.
The sip profiles are connected to the IP addresses so for each interface you want to receive connections you will need to have one.
Thank you.Yes, but this I don't remember how I did it, it was something specific that I needed. A combination of iptables rules and ip route.