FTP Server on OS X Server 10.4

[lucsax]

Hallo,
I would like to know which ports have to be forwarded to let OS X 10.4 FTP Server working from behind a router. By now it works with local clients and when I try to log from the Internet it gives an authentication error (name/password not valid).
Thank you very much for your help

 

[Satcomer]

FTP uses port 21. Here is Apple's "Well Known" TCP and UDP Ports Used By Apple Software Products document. If you ever had a port question this document will probably have the answer.