My ISP is blocking port 20 and 21 for ftp. So is there a way to add other ports that proftpd will listen on. like you can with the web server in the /etc/apache2/ports.conf file? thanks for the help
afaik: sure. edit your /etc/proftpd.conf and change the line Port 21 to your desired Port and restart proftpd/inetd