forcing ST to use a certain network card

I have a client that has 2 machines with 4 network cards in each, 3 of the cards talk directly to cameras, and 1 is for the internet. For some reason on both machines the internet works fine, but ST can’t find the other machine. I’m thinking it’s looking on one of the camera network cards. can I force it to use the correct one?

Are you using global discovery or local discovery? What OS? Are the machines on local network? Or are they behind the same NAT or separate NATs?