Firewall/NAT

Having a problem where hosts on the wireless network can't ping, ssh etc each other.  Also hosts on the LAN can't ping OPT1 (wireless) even though I've explicitly allowed On the LAN interface all traffic to the OPT1 subnet.    Also I've explicitly allowed on OPT1 all traffic to the LAN subnet. I can ping every host from the m0n0wall and every host can ping the m0n0wall.  Every host also has internet access to WAN.  Any ideas?   This seems to be a real head scratcher.

Thanks!
Peter

Check what specific kind of ICMP is allowed, try allowing them all. Also check the rules order. Just to be sure, check the firewall settings on the endpoint clients too.