Multiple OpenVPN clients on the same host

yuripod

I am working with OpenVPN in OpenWRT. I need to create multiple OpenVPN clients connected to the same VPN server. All clients shall work simultaneously.
Is it possible? If yes - what are the main steps of multiple clients setup?

Traffic

OpenVPN on OpenWRT supports --server therefore supports multiple clients.

Protip: Use google "site:" feature to search this forum for answers.

eg .. into google:

site:forums.openvpn.net openwrt

You can also use HOWTO: For OpenVPN Community Edition and create a custom server config in OpenWRT which uses standard openvpn directives (there maybe some incosistencies in OpenWRT which we do not support)

yuripod

In my application there are two hosts. On one host I have to run multiple VPN clients, each one associated with its interface. The VPN server will run on another host. All VPN clients on the 1-st will have to be connected to the same VPN server on the second host.
Of course I looked at all relevant documentation sources like HOWTO etc, but I couldn't find the clear instructions how to setup it and even if it is possible at all.

yuripod

My problem is that I have to have multiple OpenVPN clients on the same host to be connected to the same VPN server. That is if I open ifconfig I am supposed to see virtual interfaces tun0, tun1 etc. Each interface shall be associated with its physical interface. Is this supported by OpenVPN?

Traffic

What you appear to propose is:

Host 1: Openvpn Server / 1 Server instance
- Openvpn Server @ 10.8.0.1 (example)
Host 2: OpenVPN Client / Multiple Client instances
- Openvpn Client 1 @ 10.8.0.11 (examples)
  Openvpn Client 2 @ 10.8.0.21
  Openvpn Client 3 @ 10.8.0.31
  etc

This is possible ..

alexeypolo

You can use network namespaces, each VPN client will run in a separate network namespace. As a result, all clients can have identical IP addresses, because they are separated by network namespaces.