Port 21 –> TCP –> FTP File Transfer Protocol
Port 22 –> TCP/UDP –> SSH ssh,scp copy or sftp
Port 23 –> TCP/UDP –> Telnet
Port 25 –> TCP/UDP –> SMTP for sending outgoing emails
Port 43 –> TCP –> WHOIS function
Port 53 –> TCP/UDP –> DNS Server DNS lookup uses UDP and Zone transfers use TCP
Port 70 –> TCP –> Gopher Protocol
Port 79 –> TCP –> Finger protocol
Port 110 –> TCP –> POP3 for receiving email
Port 119 –> TCP –> NNTP Network News Transfer Protocol
Port 143 –> TCP/UDP –> IMAP4 Protocol for email service
Port 194 –> TCP –> IRC
Port 389 –> TCP/UDP –> LDAP light weight directory access
Port 443 –> TCP –> Secure HTTP over SSL https
Port 465 –> TCP –> Secure SMTP email using SSL
Port 990 –> TCP/UDP –> Secure FTP using SSL
Port 993 –> TCP –> Secure IMAP protocol over SSL for emails
Port 1433 –> TCP/UDP –> Microsoft SQL server port
Port 2082 –> TCP –> CPanel default port
Port 2083 –> TCP –> CPanel over SSL
Port 2086 –> TCP –> CPanel Webhost Manager default
Port 2087 –> TCP –> CPanel Webhost Manager with https
Port 2095 –> TCP –> CPanel Webmail
Port 2096 –> TCP –> Cpanel secure webmail over SSL
Port 2222 –> TCP –> DirectAdmin Server Control Panel
Port 3306 –> TCP/UDP –> MySQL Database Server
Port 4643 –> TCP –> Virtuosso Power Panel
Port 5432 –> TCP –> PostgreSQL Database Server
Port 8080 –> TCP –> HTTP port alternative one for port 80
Port 8087 –> TCP –> Plesk Control Panel Port default
Port 8443 –> TCP –> Plesk Server Control Panel over SSL
Port 9999 –> TCP –> Urchin Web Analytics
Port 10000 –> TCP –> Webmin Server Control Panel