I have a problem similar to yours, and I have tried everything to get around the problem. My current setup is as follows. The PC running PMS is dual-homed. Here is the routing table.
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 192.168.2.1 192.168.2.106 30
0.0.0.0 0.0.0.0 192.168.30.1 192.168.30.73 40
99.80.231.223 255.255.255.255 192.68.30.1 192.168.30.73 21
99.80.242.242 255.255.255.255 192.68.30.1 192.168.30.73 21
99.81.213.165 255.255.255.255 192.68.30.1 192.168.30.73 21
(I hope that looks OK.) Those three 99.8x IPs were plex.tv when I tried this last gasp. (I call it last gasp because I tried everything else. Before the above route table, I just had two entries. I tried ‘Preferred network interface’ and then restarted PMS. That did not work – insisted on going to 192.168.2.1. When I gave 192.168.30.1 a lower metric, it worked. However, I do not want 192.168.30.1 to be the go-to gateway for normal Internet traffic. I also tried setting the URL. Nothing seems to work.) So the last gasp above is based on looking up plex.tv (which I assumed is where PMS tries to go when establishing an outside connection). Notice the route table says when those IPs are used, use the 192.168.30.1 gateway, which is what I want. It just doesn’t do what I want – always uses the 192.168.2.1 gateway (lowest metric).
I have probably tried things not listed here. Does anyone know how to get this to work? I notice there’s some configuration file somewhere that has IPs in it, but it is unclear what those parameters are for.
(To make something clear: NIC1 and NIC2 in the one PC are connected to separate LAN1 and LAN2 (do I have to say respectively?) routers , which each router connected to its own ISP. I want (almost) all traffic in or out of the PC to be on LAN1 connected to ISP1. This includes LAN PLEX traffic. I want WAN connections to PLEX to come in from ISP2. I have not been able to get this to work without removing lower-metric LAN1 from the equation. One simple way to get this to work would be allowing me to specify the external URL to use to get to my PMS. That URL Settings parameter doesn’t seem to do it.)
