Ive followed the instructions in Article #1044 and I know the proper ports are opened, but I still can connect to Serv-U from an external computer. Whats wrong?
Try removing your router from your network and plugging your Serv-U computer directly into the cable or DSL modem. You should shutdown the computer, power cycle the modem, plug the computer’s Ethernet cable in to the modem, and then boot up the computer. Try connecting to your FTP server from an external computer now. If it works, please verify that you’ve followed all instructions in Article #1044 as something is still blocking the connection. If you are still unable to connect, your ISP may be blocking port 21 to prevent you from running an FTP server. Try configuring Serv-U to use an alternate port number. Make sure you update the port forward in your router/firewall to reflect this change as well.