Cyber Security/Networking: Common Ports
Created: 6/5/19
Updated: 2/29/20
::Port Number Ranges::
Well-Known Ports: 0-1023
Registered Ports: 1024-49151
Dynamic Ports: 49152-65535
Below is a listing of common ports:
Ports | Services | Protocol | Uses
20 FTP TCP File Transfer for FTP
21 FTP TCP Control aka Connection
22 SSH TCP Secure Remote Shell
22 SCP TCP Secure Copy Protocol
22 SFTP TCP Secure FTP
23 Telnet TCP Unsecure plaintext Remote Shell
25 SMTP TCP Sending Unencrypted Email
587 SMTP TCP SSL/TLS used to Encrypt (send) SMTP
53 DNS TCP Large Queries for 512k requests
53 DNS UDP Small Queries use UDP
53 DNS TCP Zone Transfers
67 DHCP UDP DHCP Client
68 DHCP UDP DHCP Server
69 TFTP UDP
79 Finger TCP
80 HTTP TCP Normal websites
88 Kerberos UDP
110 POP3 TCP Receiving Emails
119 NNTP TCP
123 NTP UDP Network Time Protocol
139 NetBIOS TCP
139 NetBIOS UDP
143 IMAP TCP
161 SNMP UDP Network Management Protocol
162 SNMP trap UDP
389 LDAP TCP/UDP Directory communication
3268 LDAP TCP/UDP Global Catalog listens on this port
443 SSL/HTTPS TCP
445 SMB over IP TCP/UDP
465 SMTP over SSL/TLS TCP
993 IMAP over TLS/SSL TCP
995 POP over TLS/SSL TCP
989 FTP over SSL (FTPS) TCP
990 FTP over SSL (FTPS) TCP
1433 MS-SQL TCP
3389 RDC TCP
514 Syslog UDP