netfilter

Practical iptables & netfilter basics for safer Linux firewalls

If you’re staring at a wall of iptables rules wondering what on earth is going on, you’re not alone. Linux firewalls can feel hostile when all you want is: “Let the right packets in, keep the wrong packets out, and don’t break SSH.” This guide walks through the basic architecture of iptables and netfilter so you understand where your rules…

iptables vs ufw: How They Work Together on Ubuntu

sepedatua • Leave a comment

Before and After: Fighting the Firewall Beast Before: you SSH into your Ubuntu server, start reading about iptables, get hit with words like chains and policies, and five minutes later you’re staring at a command that might lock you out of your own box. After: you use ufw with a few simple commands, knowing it’s just talking to iptables for…