> OK here it is! Thanks to everyone who might help with this issue!
Since it seems that you don't want NAT between LAN and WAN, you need
to check the "Enable advanced outbound NAT" option and not define any
outbound NAT rules (and remove the existing inbound NAT rules as
well). That will effectively cause m0n0wall to become a plain
(firewalling) router, with no NAT at all.