OpenVPN using wrong gateway for second client subnet

[Nathan Malinoski]

Using freshtomato-RT-AC68U-ARM-2020.2-AIO-64K on an Asus RT-AC68P, NVRAM is 64.00 KB total / 11.40 KB free.

I’m attempting to set up a three-way site-to-site VPN. Site A has the OpenVPN server (tunnel IP 10.8.0.1), and sites B (10.8.0.2) and C (10.8.0.3) are clients. I configured the clients' subnets in the client table (enabled, but not pushed). The clients connect successfully, and the subnets are added to the routing table on the server; however, both sites B and C end up being routed to site B’s tunnel IP (10.8.0.2) instead of B to B and C to C. This results in site C being inaccessible.

[Nathan Malinoski]

Sorry; this was a combination misunderstanding of how OpenVPN configures system routes and a server misconfiguration.