@pajtaz In this case the Remote Management configuration has nothing to do with WebGUI access. What you can do is to connect ER605 to WDR3600 WAN port and set its IP address 192.168.0.2 (static)....

@Bonesoul It depends on how precise you want to measure that. For example: You could use a free apps like Wi-Fi Analyzer to see the signal levels in the negative dBm values and OOKLA's Speedtest app...

@uttamsolanki If you forgot the login password for the extender you'll need to reset it to factory defaults and reconfigure again: With the extender powered on, use a pin to press the RESET button...

@IanDo If you're trying to configure an IPSec tunnel between your VR2100, here's how. If you want to route all the traffic through a VPN server, i.e. accessing the internet by using the VPN Server as...

@pajtaz Have you tried to enable the remote management for WDR3600: What's the WAN IP address of the WDR3600 ? Is it a part of your lolcal network subnet ?

@JanDN Yes, that's possible - just set Archer C24 in AP mode according to this guide (Case 1).