Multitool Linux: Practical Uses for Open Source Software

Chapter 3. Run a Whole Network with One IP Address

Difficult-o-Meter: 5 (this is a tad bit of work)

Covers:

ipchains

http://netfilter.filewatcher.org/ipchains/

ipmasqadm

http://juanjox.kernelnotes.org/

diald

http://netfilter.filewatcher.org/ipchains/

Prerequisites

A working TCP/IP network and a working connection to your ISP. A rough understanding of the differences between static and dynamic IP addresses.

Problem: I've got a whole herd of machines, but only one externally addressable IP address. What do I do?

Solution: Well, you could shell out a lot of money, buy a T-1 connection, and then get yourself a Class C address from an ISP. Or you could enable something called IP Masquerading (see the next section, What the Heck Is IPMasquerading ) and go to town with what you've already got.

 

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