Firewall/NAT

I am looking for a way to allow any traffic coming from my LAN to be able to access the WAN without being blocked. My network is currently set up with 1 LAN (192.168.1.1/24), and the WAN is hooked into my cable modem.

If I use raw sockets to send a single udp packet that comes from a spoofed ip that isn't on my lan (eg: 12.13.14.15), it is blocked at m0n0wall. What could I do to allow this traffic (and any traffic) to go outbound to WAN even though it isn't an actual IP coming from the LAN? I have tried setting up a LAN firewall rule to allow all source IPs to access all destination IPS, but that didn't work. Any other rules I can try, or is there something else I should be doing? Thanks  .

Some spoofed IP which resides outside your m0n0wall's subnet wont be able to send anything on the WAN.... This simply how IP works......

m0n0wall has built in anti-spoofing that can't be disabled. If traffic is sourced from an IP that isn't inside your network it's dropped, and you can't disable that.

I can't imagine what legit reasons you have to spoof traffic to the Internet anyway.