pf (Packet Filter) is the TCP/IP packet filtering firewall subsystem on BSD systems.
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NAT and source IP filtering in PF, using OpenBSD >= 4.7
I just read a book about PF (The Book Of PF, No Starch), but there's one question not answered by it.
If I have a gateway machine using two interfaces, $int_if and $ext_if, and I NAT the packages ...
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Perform Cisco's DNS Doctoring on FreeBSD
How to perform a change in the DNS response from a DNS server to be a different IP address than the DNS server actually answered for a given name?
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