I'm running Proftpd on my Mandy 10.2 box and can view and access the FTP directories from the LAN side with no problems.

However, I can't see the directories from the WAN side although I can log in. I see the greeting message but no directories. Both the ls and dir commands fail. I can change directories, though (e.g., cd pub works).

I have Proftpd listening on port 8889 to bypass my ISP's blocking of port 21.

Any ideas on what the problem could be? Thanks.