@terziyski That's very strange.. By entering both internal and external port same works with me (as you directed). No doubt, you give the best solution for all issues. Now that's working. Thank you...

@terziyski Still not able to log in remotely. If I am connected to WR940N, I can log in to archerC24 by entering its WAN IP with port number. While on the main ISP router, I can't log in to...

@terziyski Above are the current settings I made. I can't edit we address for management to 0.0.0.0 Moreover, there is no option for http head checker. I have mentioned the hardware and firmware...

To elaborate on what I understand. NAT forwarding on Archer C24 should be disabled (all NAT options must be disabled) In administration, allow remote management to All devices, give web management...

@terziyski I have others router behind different routers. All of them are working. In my case, the main router TL-WR940N and the sub router is Archer C24. I forwarded the port related to the the...

The issue is I can't access remotely above mentioned router by all the possible settings which I know. I can ping from router to router but unable to access remotely although I changed remote port...