@RicR95 Thanks for the information provided. The RE500 is a range extender, theoretically, it has nothing to do with NAT error. Anyway, we will do further analysis to locate this issue and try to fix...

@Nothappy Hi, can you access internet from the RE305 now？ Did you use the same wireless network name for the RE305 as the main router? If so, it is suggested to use a different name for the extender...

@trying4wifi Hi Will, what is the model number of the AC1750? It starts with RE. Can other wireless devices detect the wireless network of Deco M4? Try to disable fast roaming on the Deco app and...

@StevieBear Hi, you can hold the reset button/hole for 1s to reset it with the extender powered on. And then you can use the default login password to access it, which is admin. Good day.

@Skullsz The default IP address of the extender is 192.168.0.254, but once you set it up, the IP address will be assigned by the main router. Back to this case, we can do further analysis to locate...

@CCCCCC You can try to setup the same wireless network name for the extender; while I have to say it is related to the iPad itself. Whether it supports fast roaming or not will affect it. Good day.