When I use the provided client configuration file against OpenVPN version 2.4.9 I get the following error:
Error: Invalid prefix for given prefix length.
ERROR: Linux route add command failed: external program exited with error status: 2
The router is pushing the following control message, which is triggering the error:
PUSH: Received control message: 'PUSH_REPLY,route 10.1.10.0 255.255.255.0,route-delay 5,route-gateway dhcp,ping 10,ping-restart 120,route 10.1.10.1 255.255.255.0 10.1.10.1
The final command is what is triggering the error, as "route 10.1.10.1 255.255.255.0 10.1.10.1" is an invalid command. 10.1.10.1 cannot be the base for the /24.
Things attempted
I attempted to take this into my own hands by overriding the server's push by adding the following to the client configuration.
Error: Nexthop has invalid gateway.
ERROR: Linux route add command failed: external program exited with error status: 2
Which has to do with the fact that my computer doesn't know how to talk directly to 10.1.10.1.
As far as I can tell, the VPN server on these routers is using TAP, and the device tap0. So I should be able to push the route-gateway via DHCP? However, perhaps pulling from the client side just isn't possible?
Because I don't have access to the server configuration directly, it is difficult to troubleshoot this problem. Does anything have any input?
