Commonly Used Port Numbers

Port Number	Protocol	Function
21	TCP	FTP (File Transfer Protocol)
22	TCP/UDP	SSH (ssh,scp copy or sftp)
23	TCP/UDP	Telnet
25	TCP/UDP	SMTP (for sending outgoing emails)
43	TCP	WHOIS function
53	TCP/UDP	DNS Server (Domain name service for DNS requests)
67 68	UDP TCP	DHCP Server DHCP Client
70	TCP	Gopher Protocol
79	TCP	Finger protocol
110	TCP	POP3 (for receiving email)
119	TCP	NNTP (Network News Transfer Protocol)
143	TCP/UDP	IMAP4 Protocol (for email service)
194	TCP	IRC
389	TCP/UDP	LDAP (light weight directory access)
443	TCP	Secure HTTP over SSL (https)
465	TCP	Secure SMTP (email) using SSL
990	TCP/UDP	Secure FTP using SSL
993	TCP	Secure IMAP protocol over SSL (for emails)
1433	TCP/UDP	Microsoft SQL server port
2082	TCP	Cpanel default port
2083	TCP	Cpanel over SSL
2086	TCP	Cpanel Webhost Manager (default)
2087	TCP	Cpanel Webhost Manager (with https)
2095	TCP	Cpanel Webmail
2096	TCP	Cpanel secure webmail over SSL
2222	TCP	DirectAdmin Server Control Panel
3306	TCP/UDP	MySQL Database Server
4643	TCP	Virtuosso Power Panel
5432	TCP	PostgreSQL Database Server
8080	TCP	HTTP port (alternative one for port 80)
8087	TCP	Plesk Control Panel Port (default)
8443	TCP	Plesk Server Control Panel over SSL
9999	TCP	Urchin Web Analytics
10000	TCP	Webmin Server Control Panel
19638	TCP	Ensim Server Control Panel