20,21: FTP. Note that ftp will use a "random high port number" if the client is in PORT mode, so you may need to add a port range into your /etc/proftpd.conf file to allow ftp connections, eg: [crayon-65129486e44f6607524920/] and then open that port range as well in your firewall. 22: ssh access 25, 587: smtp for exim to recieve email 53: dns (named), so your sites resolve. TCP and UDP … [Read more...]