Internally hosted ftp server via iis
I have recently upgraded my xfinity internet to unlimited gig speeds. I have always used my own router do to the fact that I run a rather complicated network. I use a windows server 2019 domain controller and connect all other computers to my domain. I run an ftp server through the iis 10 role from the domain controller. I statically adding the internal ip address to that domain controller. Within my router all I would do is forward port 21 to that ip address of the DC. For external connection I also use a NoIp free dns domain. On the DC I use NoIp's dac agent that simply checks and associates the external IP with my domain name. Since going to the upgraded service with xfinity I elected to go with their xfi gateway. I like the ability to control the internet usage for my kids and my old modem wasn't able to handle gig speeds. Also it actually saved me 5 bucks a month with the unlimited plan. So now with the new gateway and the ports forwarding to the simian controller I'm having weird connection issues with my ftp server. Internally the ftp server works fine and I connect with no issues. Externally however it seems to get stopped after it relays to the external address. I have disabled the advanced security but I'm still unable to connect via filezilla from outside my network. Intrsting enough using a n ftp client from my phone I can get a connection to work from outside if I set the connection to active and not passive. But when doing that the connection does not work if I'm connected to my wifi (internal). Reading that the way port forwarding works in this xfi gateway it does not forward to the static ip address however uses the dhcp record and the Mac if the computers nic. Not sure if that's an issue bit I think not because if I put my Domain controller pc in the dmz it seems to work so that leads me to the fact that I may need another port range open and forwarded to that computer but I've not been able to find what works. Something that was simple before is proving to be a big pain now. I do want to keep using this gateway so I'd love to figure this out! Any help would be appreciated!