Server admin notes:
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                Running a Master Sword server behind a firewall:

With Half-life and other mods, if you are running a server behind a firewall you simply
need to open port 27015 so that people can play.  Master Sword requires that ports 2200
and 2400 also be open.  If they aren't, people can join your server, but will be stuck 
at a black loading screen with no progress bar, and will not be able to play.  

There is also a server CVAR called MS_IP. MS_IP MUST BE SET TO YOUR OUTSIDE IP ADDRESS!!
You outside IP address is the address people on the internet use to connect to your
server.  Example: 209.142.6.98.
If you are behind a firewall, this CVAR will be automatically be set to your LOCAL IP
instead of your outside IP.  If it starts with 127.0.x.x, 192.168.x.x or 169.254.x.x and
you plan on running an internet server, then you need to change it to your outside ip. 

Example: "MS_IP 209.142.6.98"

If you have a static IP (never changes), you can put this line in server.cfg so that it 
will set the correct IP each time you run a dedicated server.