Bibliografia
http://www.infowester.com/firewall.php
,
Acessado em: 10/05/08
http://www.microsoft.com/brasil/athome/security/viruses/fwbenefits.mspx
, Acessado em: 12/05/08
http://www.techweb.com/encyclopedia/defineterm.jhtml?term=Firewall
, Acessado em: 10/05/08
Thinking About Firewalls.
Marcus J. Ranum.Greenbelt, Maryland: Washington Open Systems Resource Center.
Building Internet Firewalls
. Elizabeth D. Zwicky, Simon Cooper & D. Brent Chapman. 2nd Edition, June 2000.
Internet Firewalls and Security: A Technology Overview.
3COM Technical Papers, 1996.
Firewalls and Internet Security: Repelling the Willy Hacker.
F.T. GRAMPP & R.H. MORRIS, 1994.