Model : TL-ER6020 Hardware Version : v1.0 Firmware Version : 1.1.0 Build 20150416 Rel.35252 ISP : Spectrum I have a TL-ER6020 and, since purchase, the remote management web interface is painfully...

I agree. This is a terrible security hole as is the complete lack of HTTPS support. While you should not ever access your router remotely via a browser (best practices and all), it's still a security...

I ran into this same problem (fought for a day or 2, then bought a different brand). I don't believe you can connect these together as a tunnel - which is why the instructions only show connections...