How to build a route in an IPv4 network through openvpn on IPv6?

Question

openvpn

Good afternoon! There are 2 servers with ipv6 addresses, between them OpenVPN. Each server has its own ipv4 network, how to register a route to each ipv4 network so that it goes through an ipv6 tunnel?

Thank you.

Answer 1

Found an option. 4over6
tools.ietf.org/html/rfc5747 - RFC
www.tldp.org/HOWTO/Linux+IPv6-HOWTO/chapter-config... - configuration

Answer 2

If this is a Windows Server, then through rout -add -p for each subnet on both servers.
if Linux, then through the ip command with the -6 parameter, for example (/sbin/ip -6 route add 2000::/3 dev eth0 metric 1).

Answer 3

First you need to understand. What kind of servers do you have with OpenVPN.
Are these gateways? Or is it just a VPN server and there are separate gateways?
If each of these servers is a gateway in its own network, then you need to deal with the OpenVPN configs. Since the OpenVPN server is essentially a router. And he doesn’t care about all the other routes, he builds the routes himself.
Accordingly, the config should contain the following lines:
route "Your or other networks where you need access." For example: route 192.168.100.0 255.255.255.0
and
push "route Network behind VPN". For example: push "route 192.168.111.0 255.255.255.0"
Also in client properties (client name file in ccd directory)
iroute 192.168.100.0 255.255.255.0
If these servers are not gateways, then each of the gateways must have a route to the VPN network and the VPN server as destination
. If something is not clear, ask. And first, try to draw your network with IP, then it will be easier to answer