Sorry for sounding like a broken record but i've read most of the passthrough posts on this forum and I can't seem to get this figured out. I have a bgw210 which I have put in passthrough dchp-fixed using the mac address assigned to my google wifi primary node. My network works as expected for the most part but when I went to forward ports on google wifi i found I could not access them externally unless I also forwarded the same port from the modem to the routers fixed address. I was under the impression that passthrough passed all traffic through, so I should not need port forwarding from modem -> router only from router -> computer. Even then I can't access the ports via an external address on my internal network because nat loopback isn't working (which again makes me think passthrough is not working properly). Any suggestions?
Turned off all the nat port forwarding and deleted custom services, turned off the gateway firewall completely, and deleted everything on the packet filter page, then rebooted all equipment. Didnt seem to make a difference.
Finally got it working. The problem was that I followed another post that said to assign a fixed ip address from my modem to router. This was causing my routers WAN address to be an internal ip 192.168.x.x. Creating double NAT. What i did was
1. The above, deleting firewall and filtering rules
2. Enable ip passthrough fixed-dhcp pointed at router
3. Removed the allocated ip and instead said use dhcp to assign address to my router
Now in the google wifi app I can see that my router has a public wan ip address 99.x.x.x and everything is working as expected.