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 ...

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 ...

Imre Palik tried to speed up some of Linux's networking code but was met with stubborn opposition. Essentially, he wanted networking packets to bypass the netfilter code unless absolutely necessary.

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 ...

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 ...

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 ...