I have a TP-Link archer c7 that I use as an access point connected to my ZTE mf283 router. To my TP-Link ac I have connected a 250GB external HDD which I use as storage for my FTP server that I set up on my TP-Link router.
That works great on my local network but I wanna be able to connect to my router from outside my network so I tried portforwarding but I soon found that that I need to use passive FTP. Now I understand theory more or less but how can I set that up so that it works?