Kali's Brian Hayes sends along word on how to use Kali to find Descent 3 servers on the Internet, and how to run a dedicated non-PXO server:

I've been seeing some people asking when we(Kali) we're going to support D3. So I figured I'd put together this message to help some of the people out there. The latest version of Kali 1.68 (ftp://ftp.kali.net/pub/kali/k95_168.exe) works fine for Descent 3 full. If you having trouble seeing all the games from PXO or Gamespy, try Kali. As of right now I see about 20-25 servers running with barely anyone on them.

Setting up the Kali TCP GameBrowser for D3.

1) Make sure you've run the Descent 3 from the "Start Menu" icon at least once to configure all your settings.
2) Make sure you've connected to PXO from inside Descent 3 at least once.
3) Run the "Kali TCP Game Browser" Icon, or run Kali and click the "TCP Games" Button.
4) Select the Descent 3 Folder on the left.
5) Press the Right mouse button and select "Configure Descent 3".
6) Under the "EXE File" field, select the "Browse" button and find your Descent 3 directory.
7) Select the file "main.exe" from that directory.
8) If your Kali Nickname is not EXACTLY the same as your D3 pilot name then Uncheck the "Use Kali NickName" option.
9) Hit OK.
10) Find the the server you want to join in the "Descent3/Parallax Online" folder and double click it. It should automatically launch D3, login to PXO, and connect you to the server.

Running a dedicated NON-PXO Server.

For people that want to run a Direct TCP/IP server that doesn't use PXO do this.

1) modify your server's "dedicated.cfg" so it uses Direct TCP/IP instead of PXO(Change the "ConnectionName" variable to "Direct TCP~IP")
2) modify the "gspy.cfg" file in your D3 directory and change the line that has "master0.gamespy.com" to read "205.244.188.34:22999".
3) when you run the server make sure you added the "-gspyfile gspy.cfg" commandline option.

This will launch a server that runs outside of PXO. So when users connect to this server they won't have to connect to PXO first. Also this means that player stats are NOT tracked when playing on this server. Under the Kali TCP Browser the server will show up in the "Descent3/Miscellaneous" folder NOT the "Descent3/Parallax Online" folder.