17th July 2008
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Administrator
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Join Date: May 2008
Location: Budel - the Netherlands
Posts: 4,132
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- Assign the external NIC of the FreeBSD router all 20 addresses. First address as normal, the other 19 as alias.
- Use a RFC 1918 address from 10/8 or 192.168/16 for the internal NIC and your LAN.
- On the same FBSD router configure a packet filter like pf which has Network Address Translation capabilities.
Outgoing connections, initiated by your LAN clients, will now use one of the 20 external IP addresses,
See http://www.openbsd.org/faq/pf/nat.html
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You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump
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