| FTP uses two connections. Port 21 is the command connection, which works. In active mode, the data connection is made in the opposite direction, so when you use a router/firewall, it tends to get blocked. I.e., try switching to passive mode. Your ftp client should have an option for that.
As for your tracert, it doesn't necessarily mean anything. Often this ICMP messages get dropped. Your router is probably configured to discard them for security reasons.
Don't worry about the "black hole". |