Windows Server 2000 port lock down

[SandySue () epix net]

Can anyone direct me to a set of windows commands to close ports on a Windows 2000 server (or if necessary, a third 
party application that can be loaded on a Windows 2000 server to close ports).  I'm looking for a solution to close 
ports that encompasses the least amount of process overhead;  the goal is lock down outbound traffic.  The solution 
must work on a 2000 Server.  Thanks bunches!!!