Locking down IE access to internet

[Jeremy Hendrickson <jhendrickson () tulsaconnect com>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

I am looking for a way to lock IE down so that it can only access
Windows Update.  I am trying to force the use of safer browsers such
as Mozilla or Firefox.  Is it possible to transparently proxy an
internet connection based upon user agents.  Or does anyone have a
better solution.  I am running a linux based firewall/router(iptables).
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (MingW32)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFA4MFwPPD+dUc7VM4RAqhxAKCAfvhTXLPYTPuyZaUJVCnfNjLyBQCePKiz
VWm7Fc0NOu/fdQbR6kp2JDA=
=UEpR
-----END PGP SIGNATURE-----


---------------------------------------------------------------------------
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
----------------------------------------------------------------------------