@DinsdalePiranha XR500v supports Bridge connection according to its specifications: In this case you can configure X20 / X60 in router mode: If for some reason you can't configure the XR500v in...

@JDMx You're pretty much out of options here. Port 22 is used for managing the router through the Tether app. If you can't telnet at port 23 then telnet access is blocked as well.

@water-decanter If you don't want to use the AX1800 DNS configure your client devices to receive their IP addresses by the router's DHCP server and set an optional DNSes which you want to use:...

@IslandBoy " Easy Installation & Quick Position The extender works with any standard wireless router. Instantly connect the extender to a router by pressing the router’s WPS button (if available)...

@IslandBoy The main working modes are described in the device user guide as follows: 1. Range Extender - Chapter 2.2 (wireless clients) 2. Wireless Adapter - Chapter 4.1 (wired/wireless clients) 3....

@Cluedo Have you tried to exclude the wireless interference around you - https://www.metageek.com/products/inssider/ by selecting the least crowded wireless channels for both bands.