Ivan Velichko on Twitter: "3. Memo - iptables are about tables of chains of rules. Most common tables: raw -> mangle -> nat -> filter Chains are called after the predefined stages:
iptables Tutorial and Exmaples | The Daily Admin
IPTABLES: table types | Linux Addicts
networking - In which order are rules of custom iptables chains evaluated? - Server Fault
An In-Depth Guide to iptables, the Linux Firewall - Boolean World
Traversing of tables and chains
Understanding IPTables · Jimmy Song
Karchnu - "iptables"
Linux IPTABLES Firewall Basics | Identity and Access Management blog
explanation of rc.firewall
iptables — Wikipédia
Linux Firewall Tutorial: IPTables Tables, Chains, Rules Fundamentals
Linux Firewall Tutorial: IPTables Tables, Chains, Rules Fundamentals
IPMenu
What is iptables | Linode Docs
Workin with Iptables: full manual with examples
Iptables Tutorial: Ultimate Guide to Linux Firewall
Illustrated introduction to Linux iptables
linux - Custom chains Iptables and predefined - Server Fault
Introduction to IPtables | Erle Robotics Introduction to Networking in Linux