Common TCP Ports


The TCP/IP protocol assigns ports to standard software so it can send data to the correct software when it is all running on a single machine.

These are just the ones that I've needed to use in the past. The complete official list. is maintained by IANA
Port Description
20 FTP - data
21 FTP - control
22 Secure Shell (SSH)
23 Telnet
25 SMTP
53 DNS
67 DHCP
68 DHCP
69 TFTP
80 HTTP
110 POP3
123 Network Time Protocol (NTP)
161 SNMP
220 IMAP
366 SMTP
389 LDAP
443 HTTPS
631 Internet Printing Protocol (IPP)
993 IMAP4 SSL
995 POP3 SSL
1433 Microsoft SQLServer
3306 MySQL
3389 Remote Desktop Protocol (RDP)
5432 PostgreSQL
6379 Redis


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