Port Reference Guide
A searchable database of common networking ports, protocols, and their descriptions.
Port Number | Protocol | Service | Description |
|---|---|---|---|
| 20 | TCP | FTP-DATA | File Transfer Protocol (Data Transfer) |
| 21 | TCP | FTP | File Transfer Protocol (Command Control) |
| 22 | TCP | SSH | Secure Shell - Secure log in and data transfer |
| 23 | TCP | Telnet | Unencrypted text communications |
| 25 | TCP | SMTP | Simple Mail Transfer Protocol (Email Routing) |
| 53 | TCP/UDP | DNS | Domain Name System |
| 67 | UDP | DHCP | Dynamic Host Configuration Protocol (Server) |
| 68 | UDP | DHCP | Dynamic Host Configuration Protocol (Client) |
| 80 | TCP | HTTP | Hypertext Transfer Protocol (Web) |
| 110 | TCP | POP3 | Post Office Protocol v3 (Email Retrieval) |
| 123 | UDP | NTP | Network Time Protocol |
| 137 | TCP/UDP | NetBIOS-NS | NetBIOS Name Service |
| 138 | TCP/UDP | NetBIOS-DGM | NetBIOS Datagram Service |
| 139 | TCP/UDP | NetBIOS-SSN | NetBIOS Session Service |
| 143 | TCP | IMAP | Internet Message Access Protocol |
| 161 | UDP | SNMP | Simple Network Management Protocol |
| 389 | TCP/UDP | LDAP | Lightweight Directory Access Protocol |
| 443 | TCP | HTTPS | Hypertext Transfer Protocol Secure (Web) |
| 445 | TCP | SMB | Server Message Block (Windows File Sharing) |
| 465 | TCP | SMTPS | SMTP over SSL (Deprecated, but common) |
| 514 | UDP | Syslog | System Logging Protocol |
| 587 | TCP | SMTP | SMTP (Message Submission) |
| 636 | TCP/UDP | LDAPS | LDAP over SSL |
| 873 | TCP | Rsync | Rsync File Transfer Services |
| 993 | TCP | IMAPS | IMAP over SSL |
| 995 | TCP | POP3S | POP3 over SSL |
| 1080 | TCP/UDP | SOCKS | SOCKS Proxy |
| 1194 | UDP | OpenVPN | OpenVPN Default Port |
| 1433 | TCP | MS-SQL | Microsoft SQL Server Database |
| 1521 | TCP | Oracle | Oracle Database Default Listener |
| 1723 | TCP | PPTP | Point-to-Point Tunneling Protocol |
| 2049 | TCP/UDP | NFS | Network File System |
| 3128 | TCP | Squid | Squid Web Proxy |
| 3306 | TCP | MySQL | MySQL Database |
| 3389 | TCP | RDP | Remote Desktop Protocol (Windows) |
| 5432 | TCP | PostgreSQL | PostgreSQL Database |
| 5672 | TCP | AMQP | Advanced Message Queuing Protocol (RabbitMQ) |
| 5900 | TCP | VNC | Virtual Network Computing |
| 6379 | TCP | Redis | Redis Key-Value Store |
| 8080 | TCP | HTTP-ALT | HTTP Alternate (Commonly Tomcat, Proxy) |
| 8443 | TCP | HTTPS-ALT | HTTPS Alternate |
| 9092 | TCP | Kafka | Apache Kafka Default Broker |
| 9200 | TCP | Elasticsearch | Elasticsearch REST API |
| 11211 | TCP/UDP | Memcached | Memcached Memory Cache |
| 27017 | TCP | MongoDB | MongoDB Database Default |