When deciding on a firewall implementation, most Unix-savvy administrators have usually chosen to use ipfilter on OpenBSD for their combination of capabilities and stability, as the capabilities of ...

Nick Gregory, a Sophos threat researcher, found this hole recently while checking netfilter for possible security problems. Gregory explains in great detail his bug hunt, and I recommend it for those ...

Check Point Software Technologies has the largest market share of any firewall vendor with their Firewall-1 (FW-1) product, and Nokia manufactures several hardware appliances together with an ...

Following the publication of “Taming the Wild Netfilter” in the September 2001 issue of LJ [/article/4815], I received a number of e-mails, most asking for more detailed information on working with ...

Sophos researcher Nick Gregory has uncovered a dangerous security bug in Linux's netfilter application which could enable a local attacker to escalate privileges on vulnerable machines and carry out a ...

I'm looking to write a Perl program to monitor my network services for intrusion and DOS attempts. I want to take advantage of the INSERT and DELETE options of the "iptables" command. I was hoping ...