You'll probably find you don't need a dedicated server for Quake 2. I
hosted a 9 player LAN session last Friday evening just using thinwire
between all machines and terminated at both ends. We even got away with
using IPX and there were no bandwidth problems at all - smooth as silk.
In the early days of Quake2, we did set up a Q2 server which was simply a
486 with 64Mb RAM and that was fine.
Mike.