Cisco
 - Connected to ISP/Internet
 - Fully managed by our ISP
 - X.X.106.0/24 statically routed to Z.Z.107.121
 - Gi0/0: Z.Z.107.122

FW/Router (OpenBSD)
 - Default gateway: Z.Z.107.122
 - em2 (WAN): Z.Z.107.121/30
 - em0 (LAN): X.X.106.254/24

LAN
 - Default gateway: X.X.106.254
 - Network X.X.106.0/24


How to:
 - Configure OpenBSD to properly route X.X.106.0/24 to internet without NAT
 - Packet filter properly (in/out LAN)