Transparent Reverse Proxy on OpenBSD

Continuing this series of posts on transparent reverse proxy, here’s how to do it on OpenBSD.

The OpenBSD host running Pen has IP addresses on em1 and on em2. The client debian2 has IP address and the server debian3 has IP address

OpenBSD takes first price in the easy management department by not requiring any special firewall rules or policy routing whatsoever. Just start Pen exactly the same way as on Linux and FreeBSD:

sudo ./pen -df -O transparent

The client sees a connection from to The server sees a connection from to




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