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TCP UDP Ports


Official List

Very Important Linux Port Numbers

The following are the frequently used well known port numbers in linux servers used by various daemon services and applications. You may want to configure your firewall accordingly to restrict services running on your server by blocking the desired ports.

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 113 -> ident tcp outbound

Port 115 --> Secure File transfer protocol
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 783 -> TCP -> SpamAssassin spamd daemon

Port 990 –> TCP/UDP –> Secure FTP using SSL
Port 993 –> TCP –> Secure IMAP protocol over SSL (for emails)

Port 4664 -> Google desktop search port

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 2089 -> TCP -> Cpanel license tcp outbound
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 5224 -> plesk-license-update (outgoing connection only)
Port 8443 -> plesk-https

Port 6666 -> chat tcp inbound
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 8880 -> Plesk-http

Port 9080 -> Tomcat
Port 9999 –> TCP –> Urchin Web Analytics
Port 10000 –> TCP –> Webmin Server Control Panel
Port 19638 –> TCP –> Ensim Server Control Panel

Port 39270 -> Limewire