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 ...

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 ...

I'm trying to redirect port 80 to 3000 and I'm having trouble combining it to my filter rules. Both *nat and *filter rules work correctly when used separately, but not when applied together *nat ...

you can use iptables-save and iptables-restore if you make complicated policies. On my personal machine, I used to just dump the rules in /etc/init.rc (before I started using iptables-restore in the ...