ftpd configuration?

Yesterday my father was trying to ftp to my SuSE 9.0 PC to get some files but couldn't connect. I discoverd that I just got bit by Comcast starting to filter ports 21 and 80. It was easy enough to figure how to tamper with Apache since it is in YaST so I was able to use another port with no trouble. In looking into ftpd, I can't figure out how to change to listen on another port. I tried man ftpd but didn't find any mention of ports or a configuration file. I tried visiting SuSE support and Google search but no luck so far. Is there a configuration file for ftpd? can the port be changed from 21 to something else? If ftpd is too limited, can anyone suggest a favorite alternate? Damon Register