Open Cisco ports

The following cisco ports need to be open:
Machines Port Protocol Reason
Ltnb0 20, 21 TCP Ftp access to ltnb by external entities (for updating Web pages for example)
Ltnb0, Ltnb10 22 TCP Ssh (remote access)
Ltnb0, Ltnb10 25 TCP Incoming mail
Ltnb10 53 TCP & UDP Domain lookups for domains by external entities
Ltnb0 80 TCP Web hosting
Ltnb0 123 TCP & UDP Xntp (time keeping)
Ltnb0 143 TCP Imap (mail) browsing from outside
Ltnb0 443 TCP Https web hosting