Basic firewall filtering question

["Ferino Mardo" <RMardo () ALJOMAIHBEV com>]

If a personal firewall is installed in a PC connected to a Win2K LAN,
netbios is allowed by allowing ports 137 to 139 in both directions. How
does one define a rule such that:

1. active directory authentication/browsing works

While at the same time making the PC invisible to the rest of the LAN
users?

TIA.

---------------------------------------------------------------------------
Ethical Hacking at the InfoSec Institute. Mention this ad and get $545 off
any course! All of our class sizes are guaranteed to be 10 students or less
to facilitate one-on-one interaction with one of our expert instructors.
Attend a course taught by an expert instructor with years of in-the-field
pen testing experience in our state of the art hacking lab. Master the skills
of an Ethical Hacker to better assess the security of your organization.
Visit us at:
http://www.infosecinstitute.com/courses/ethical_hacking_training.html
----------------------------------------------------------------------------