Linux IP Masquerading

Agenda

What not to expect

Why is IP Masquerading HOT?

Emerging Applications

So what is it?

A Simple Setup

How it works

IP Translation Tables

IPFWADM (Firewall)

IPPORTFW (Port Forwarding)

Loadable Kernel Modules

Example (My Home)

Example Config

Setup Procedure

Setup Configuration (S99local)

Verify Configuration

Problems

Private IP Address Space (RFC 1918)

Illegal Address Space Issues

References