Can't Add Client

Greetings,

I’ve been wrestling with a new client (Win 10) on a different subnet from server, and I can’t seem to add client to server at all. Not from IP address Hint in server console at least, I’ve also tried using Internet, and was able to add client to server that way, but eventually server would just not connect to client and would show offline.

When I use IP hint, it first shows client is online, but then says it’s offline and doesn’t try to reconnect.

Is there a solution to this problem?