http://iptables-tutorial.frozentux.net/chunkyhtml/targets.html#TTLTARGET I think you will figure about ttl match too. On Fri, 11 Mar 2005 23:49:21 -0800 (PST), pop liviu <liviup76@xxxxxxxxx> wrote: > Hi, > My name is Liviu Pop and i am from Bucharest, Romania. > > I have 2 big questions, and i didn't find any answer > about this: > > 1.How can i block NAT-ed packets from a router behind > my firewall/router? > > 2.How can i pass a firewall that block NAT-ed packets? > > Best Regards, > Liviu Pop > system engineer > > > __________________________________ > Do you Yahoo!? > Yahoo! Small Business - Try our new resources site! > http://smallbusiness.yahoo.com/resources/ > > -- Bla bla