UPDATE: Everything is actually working fine (sort of), this was a case of minor misconfiguration. I was trying to access an FTP server hosted by a Raspberry Pi on my network. The issue was that the...

A good first step would be to back up your router settings and then factory reset. See if that resolves the issue.

@Kevin_Z I have this same router, Archer C7 v5, and hairpinning (NAT loopback) is definitely not working. I've even tried to disable NAT Boost, since one online discussion of this said that worked,...

I contacted support. They were useless... Dear Customer, This TP-LINK Technical Support Department. Thanks for sending to us your problem. [/FONT] [FONT=Verdana]Please, Send me your current firmware...

Model : Hardware Version : Firmware Version : ISP : I'm a bit lost. On the back of the router it says: AC750 Wireless Dual Band Gigabit Router Model: Archer C2 Ver: 1.1 I live in Israel and bought it...