How to Use Linux Server Iptables for Advanced Packet Filtering

Linux Server Admin with Fexingo: Sysadmin, Bash, and Server Engineering · Jul 4, 2026 · 10m · transcript

In this episode of Linux Server Admin with Fexingo, Lucas and Luna dive into iptables — the classic packet filtering framework still essential for sysadmins managing Linux servers. They walk through real-world examples: setting up rules to allow SSH while blocking brute-force attempts, creating stateful firewall policies, and logging dropped packets for troubleshooting. Lucas explains the difference between chains, tables, and matches, and shares a minimal iptables script that secures a basic web server. Luna asks why iptables remains relevant alongside nftables, and they discuss migration…