I've been having some trouble port forwarding. I have a TD-W9970 setup to DMZ to my WRT1900ACS. I've made sure to disable the TD-W9970s DHCP server and set the WRT1900ACS to a static IP and to have the DMZ forward to that IP. Then I applied the following configuration to port forward. I don't see why it is not working.
config redirect option target 'DNAT' option src 'wan' option src_dport '22' option dest_port '22' option name 'testport' option proto 'tcp udp' option dest_ip '192.168.1.227' option dest 'lan'