Building the Network You Need with OpenBSD's PF: BSDCan, Ottawa May 6th, 2009
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# NAT?

Network Address Translation

- Why: Internet commercialization (early 1990s)

- Predicted shortage of official IP-adresses

- Long term solution: IPv6 (128 bit addresses)

- Shorter term solutions: translation logic (RFC 1631, 1994) and private (non routable) adresses (RFC 1918, 1996)

When official addresses are not

- available

- practical