@BilboLaggins If your ISP router (modem ?) could be set in bridge mode you'll overcome the double NAT issue and use your C6 in the original setup - check this FAQ. If that's not possible another...

@leojavito86 Check this feature request. It's for Archer C54, but the same is valid for Archer C24. Make sure that you're with the lastest FW release for C24 and uncheck the HTTP Referer Head Check...

@zEnterHacker DHCP address reservation is a good way to fix a clienmt IP address by tis MAC address and perferct workaround in your case.

@RehoDesign Regarding usage status there's nothing more you can do except what I pointed you. It's TP-Link decision whether to implement Home Shield or not. As I posted AX12 is an entry level router...

@Purya_Sadin I would if I had it. Non public beta FW releases are provided only by TP-Link admins regarding a specific issue that should be resolved - here's an example with VR600.

@Ronaldoasad7 Try updating the RE505X to its latest FW release - here (v1.0.13) and then test again. Here's how to update the FW.