We are trying to setup Serv-U MFT with a gateway. We are having an issue. I can see the server is communicating with the Gateway without any issue. We do have a 1-1 Nat from an external IP to our DMZ gateway server. We have allowed all the services such as FTP, SFTP, HTTP and HTTPS on our firewall. But for some reason when I try to connect from outside I do not seem to get through. Not sure if there is any other setup which is needed to get this working. I have even allowed these ports on the DMZ VM which hosts the gateway product. I am able to connect internally without any issues. Any guidance would help.