Most of us think of iptables strictly as a firewall tool for keeping remote attackers at bay. But did you know it also can be used to keep local users in line? The experimental match extension owner ...

When you use IPTables to create a firewall for your company's Web server, one way to prevent certain users from accessing the server is to block their IP addresses. Use the "iptables" command to ...

Mastering iptables could take a while, but if you have a few rules to cover the basic security needs, you'll be well on your way to protecting your Linux system. Jack Wallen explains some key rules to ...

Iptables, more properly referred to as “iptables/netfilter” because of the two modules that are involved — the userspace module “iptables” and the kernel ...

For those of you who have taken the plunge and upgraded from kernel 2.2.X (or even 2.0.X) to 2.4.X, congratulations. If, like a number of folks, you're running some form of firewall using either ...