READ THIS IMPORTANT SECTION !!!
I hereby disclaim all responsibility for this hack. If it backfires on you in any way whatsoever, that's the breaks. Not my fault. If you don't understand the risks inherent in doing this, don't do it. If you use this hack and it allows vicious hackers to break into your company's computers and costs you your job and your company millions of dollars, well that's just tough nuggies. Don't come crying to me.
Copyright © 1998 by François-René Rideau. This document may be distributed only subject to the terms and conditions set forth in the LDP license at http://sunsite.unc.edu/LDP/LICENSE.html.
Even though I rewrote most everything but the disclaimers, I'm indebted to Barak Pearlmutter mailto:bap@cs.unm.edu for his Term-Firewall mini-HOWTO: I think there was a necessity for a mini-HOWTO about piercing firewalls, and despite its shortcomings, his HOWTO was a model and an encouragement.