Will Windows 2k NAT forward broadcast?

[Ryan]

I am setting up a test lab which will be connected to the
production network via a Windows 2K Server running NAT.
We are concerned with the PCs in the test lab broadcasting
packets and flooding the production network. My question
is will Windows 2K Server running NAT services forward
broadcast? I'm assuming it doesn't because it is acting
as a router. If it does forward the broadcast is there a
way to have it drop those packets.

Thanks in advance,
Ryan

 

[Bojan Zivancevic]

When you enable NAT on w2k server you are in fact enabling routing. So,
broadcasts can't pass the router - you have two separate networks. If you
want to be sure you can always enable packet filtering on the inside
interface and stop the unwanted traffic from even entering the NAT router.
Also, if you don't need netbios services, it will be better to block netbios
ports 137,138 and 139.

Bojan