[Openvpn-users] topology subnet and ccd/ifconfig-push plus push "route..."

[Albert S. <ap...@fr...>]

All,

I'm running into some problems when I combine topology subnet, start
issuing IPs outside of the 'server pool' through ccd/ifconfig-push and
subsequently want to push "route...".

Server config
-------------
server 10.8.0.0 255.255.255.0
dev tun
topology subnet
client-config-dir ccd
push "route 10.10.10.0 255.255.255.0"
route 10.8.1.0 255.255.255.0


File in server ccd directory
----------------------------
ifconfig-push 10.8.1.2 255.255.255.0


Client config
-------------
client
dev tun
topology subnet


Upon succesfully connecting with the server the client configures IP
10.8.1.2, as would be expected. However, adding the route (push "route")
fails as the route command uses 10.8.0.1 as the gateway for the route.
The client doesn't know about 10.8.0.1/24 as it's configured with
10.8.1.1/24.
It doesn't seem possible to add an extra IP to the server tun interface
with --ifconfig (e.g. 10.8.1.1) in order to e.g. issue a:
push "route 10.10.10.0 255.255.255.0 10.8.1.1"
It also doesn't seem possible to route to the tun device instead of the
gateway IP either.

I'm wondering if there is a solution to this or if one would need a /30
topology again for this to work, as I expect the route command will be
able to use the server side /30 IP to push the route to.

Cheers,
Albert