Ok let me give you the scoop here. I know what I am doing. I setup networks for a living. Ports forwarded or not I get the same response. No firewall on the machine or anything. Now Since I get no error just a no response and server restart and all ports are open forwarded it makes no sense.
What this response tells you, specifically, is that you are able to send the outbound TCP connection to the master server to ask to be queried, but your server is not
responding to a UDP query for information on the port given. Meaning that even if it were added to the list in this state, it would be utterly useless to you or anyone else.
If ispawn closes the server afterwards, you've either got a mixup in your prefs and shortcut, or the server isn't replying to local info requests.
Tribes2.exe -dedicated -mod Classic
$Host::Port = 28000
To top it off I get errors trying to run an -nologin setup when I have no internet connection but, if I have an internet connection it runs with no error.
This is an oversight on my part, by way of neglecting to do a check to see if you're playing in online mode before initiating the listing script, and forgetting to check it with internet disabled. It has been fixed in the next patch, but in the mean time if you need to play in LAN mode with no connection I'd recommend disabling base\T2csri.vl2 temporarily as Turkeh mentioned.