Wireless Joint

I recently bought a 5G M.2 TO RJ45-KIT to replace the WG1608 router(unfortunately it's a known issue that openwrt v22.x cannot get full speed of RM520N).
It was easy to setup auto connect and I have excellent internet speed coming out of the RJ45 port directly to my router.

However, all my ioT devices cannot connect to the Internet, Awair, Rachio, GE Range, etc. Even my Cloudflare WARP client won't connect. they all complained about double NAT, and said the firewall blocked 443, 8443, etc. But I already disabled my firewall in my router. I wonder if this is something coming from my RM520N module itself.

I have tried to set up IP passthrough in my RM520N, however, that seems not working. I am still getting 192.0.0.2 WAN IP from my ASUS router.

Does anyone have experience with that?

You might want to send this AT command to enable IP pass through and then this to revert to NAT mode, execute this comman

True IP passthrough is only possible with an assigned public static IP from your cell carrier. Otherwise you will get either the 192.0.0.x address, or possibly on Tmo randomly a decommissioned, military I think, IP that is actually public facing, for now, or sometimes the local interface address,192.168.225.1. Tmobile does all three at different times.