Building the Network You Need with OpenBSD's PF: BSDCan, Ottawa May 6th, 2009
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# Single NAT, web & mail server on the inside: from the inside

Problem: Traffic from the inside does not reach the internal interface

Solutions:

- ' Split horizon' DNS, different answer for LAN and elsewhere

- proxying, such as nc (NetCat)

- Moving your servers to a separate DMZ

- special case of redirection and NAT for the local net