[Gllug] Network configuration

[Tethys]

Chris Andrews writes:

>You only need to map ports where you have fewer IP addresses than
>machines, and that's where the NAT breakage comes in.

To be fair, there are other places. Certain application protocols
include the IP address (no, don't ask me why), and hence break
when using NAT. Some others break because Cisco boxen don't do NAT
properly. Rather than rewriting the packet, they simply encapsulate
it.

Tet

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