Issues trying to setup FTP on Server 2008 through a Cisco 877w firewall.
Local LAN client can connect via FTP to the ftp data share fine, but external clients are presented with a login box, then it fails to load a folder structure.
If i try to telnet from an external source to our firewall's external address on port 21 it connects fine. If I try on port 20 it fails. If I set the range within IIS to 65500-65500 then try to connect on that port it also fails.
All of the relevant ports are open on the firewall, and all ports are added to the NAT config as required.
Windows firewall is disabled.