Important Linux TCP/IP Port Number

Please find the below complete list of TCP/IP port number in Linux system.

➤ 20- FTP ( File Transfer Protocol) -It is used for transfer the data using ftp connection

➤ 21- FTP Control - It is used this port for ftp connection.

➤ 22- SSH (Secure Shell)- It is used for connecting the secure shell which using SSL encryption.

➤ 23- TELNET - It is used for insecure remote connection.

➤ 25- SMTP (Simple Mail Transfer Protocol)- It is used as a mail transfer agent for email server.

➤ 53- DNS (Domain name system)- It is used for translate the domain name to IP address.

➤ 67- BOOTP (Bootstrap Protocol)- Used for automatically assign the IP address to network device.

➤ 68- DHCP (Dynamic host configuration protocol)- It is a network protocol to enable a server to automatically assign an IP address to system.

➤ 69- TFTP (Trivial file transfer protocol)- Used this protocol in PXE Boot services.

➤ 80- HTTP ( Hypertext Transfer protocol)- Used for WWW web connection.

➤ 88- Kerberos Protocol

➤ 110- POP3 (Post Office Protocol)- Used as a mail delivery agent.

➤ 113- XINETD (Extended Internet Daemon)

➤ 115- SFTP ( Secure File Transfer Protocol)

➤ 123- NTP (Network time protocol)- Used for time syncing uses UDP protocol

➤ 137- NetBIOS (Network basic Input/Output system)

➤ 139- NETBIOS-SESSION Service

➤ 143- IMAP (Internet Message Access Protocol)

➤ 161- SNMP (Simple Network Management Protocol)- Used for network monitoring.

➤ 389- LDAP (Lightweight Directory Access Protocol)

➤ 443- HTTPS ( Hypertext Transfer protocol secure)- Used with SSL encryption.

➤ 445- SMB (Server Message Block or SAMBA)

➤ 514- Syslogd (udp port)

➤ 840- NIS (Network Information Service)

➤ 873- rsync Used for file synchronization.

➤ 990- FTPS (File transfer protocol secure)

➤ 993- IMAPS ( For Secure Connection)

➤ 995- POP3s ( Mail delivery agent with secure connection)

➤ 2049- NFS ( Network file sharing)