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Linux Networking: Iptables Crash Course
Introduction and Crash Theory
Iptables: Theory Overview - 1 (tables, chains, rules) (6:03)
Iptables: Theory Overview - 2 (rules, targets, policies) (3:44)
Packet processing: FILTER, NAT, MANGLE (3:47)
Iptables Structure as a Cheat Sheet
Iptables Cheat Sheet (Syntax)
Quiz 1
OSI Model and iptables
OSI Model - 1 (5:16)
OSI Model - 2 (4:39)
Quiz 2
Lab setup in GNS3
Quick Overview
Build the lab: 1 - GNS3 (1:23)
Build the lab: 2 - Virtualbox + Debian (2:18)
Build the lab: 3 - Configure the lab & set up networking settings (8:56)
Filter table
First steps: View and Accounting (6:54)
Basic operations with rules (7:05)
How to generate iptables rules with Wireshark (7:24)
Default Policy (7:19)
Custom Chain (6:20)
iptables as Stateful Firewall - part 1 (6:16)
iptables as Stateful Firewall - part 2 (6:54)
How to easily save iptables on Debian (and some other distros) (4:08)
Quiz 3
NAT table and Mangle table
Nat table - part 1: Source NAT, Masquerade (7:09)
Nat table - part 2: Destination NAT (4:02)
Mangle table - how to change packet fields (7:46)
Quiz 4
Additional
Customize console resolution: Debian vs. CentOS (3:07)
CONCLUSION with BONUS
Mangle table - how to change packet fields
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