Look up common port numbers
| Port ↑ | Protocol | Service | Description |
|---|---|---|---|
| 20 | TCP | FTP-DATA | FTP data transfer |
| 21 | TCP | FTP | FTP control (command) |
| 22 | TCP | SSH | Secure Shell |
| 23 | TCP | Telnet | Unencrypted text communications |
| 25 | TCP | SMTP | Simple Mail Transfer Protocol |
| 53 | TCP/UDP | DNS | Domain Name System |
| 67 | UDP | DHCP | DHCP Server |
| 68 | UDP | DHCP | DHCP Client |
| 69 | UDP | TFTP | Trivial File Transfer Protocol |
| 80 | TCP | HTTP | Hypertext Transfer Protocol |
| 110 | TCP | POP3 | Post Office Protocol v3 |
| 119 | TCP | NNTP | Network News Transfer Protocol |
| 123 | UDP | NTP | Network Time Protocol |
| 135 | TCP | RPC | Microsoft RPC |
| 137 | UDP | NetBIOS | NetBIOS Name Service |
| 138 | UDP | NetBIOS | NetBIOS Datagram Service |
| 139 | TCP | NetBIOS | NetBIOS Session Service |
| 143 | TCP | IMAP | Internet Message Access Protocol |
| 161 | UDP | SNMP | Simple Network Management Protocol |
| 162 | UDP | SNMP-TRAP | SNMP Trap |
| 389 | TCP | LDAP | Lightweight Directory Access Protocol |
| 443 | TCP | HTTPS | HTTP over TLS/SSL |
| 445 | TCP | SMB | Server Message Block |
| 465 | TCP | SMTPS | SMTP over TLS/SSL |
| 514 | UDP | Syslog | System Logging |
| 587 | TCP | SMTP | SMTP (mail submission) |
| 636 | TCP | LDAPS | LDAP over TLS/SSL |
| 993 | TCP | IMAPS | IMAP over TLS/SSL |
| 995 | TCP | POP3S | POP3 over TLS/SSL |
| 1433 | TCP | MSSQL | Microsoft SQL Server |
| 1434 | UDP | MSSQL | Microsoft SQL Server Browser |
| 1521 | TCP | Oracle | Oracle Database |
| 1723 | TCP | PPTP | Point-to-Point Tunneling Protocol |
| 1883 | TCP | MQTT | MQTT Protocol |
| 2049 | TCP/UDP | NFS | Network File System |
| 2181 | TCP | Zookeeper | Apache Zookeeper |
| 3306 | TCP | MySQL | MySQL Database |
| 3389 | TCP | RDP | Remote Desktop Protocol |
| 5432 | TCP | PostgreSQL | PostgreSQL Database |
| 5672 | TCP | AMQP | RabbitMQ AMQP |
| 5900 | TCP | VNC | Virtual Network Computing |
| 6379 | TCP | Redis | Redis Database |
| 8080 | TCP | HTTP-ALT | HTTP Alternate (proxy) |
| 8443 | TCP | HTTPS-ALT | HTTPS Alternate |
| 8883 | TCP | MQTTS | MQTT over TLS/SSL |
| 9092 | TCP | Kafka | Apache Kafka |
| 9200 | TCP | Elasticsearch | Elasticsearch HTTP |
| 9300 | TCP | Elasticsearch | Elasticsearch Transport |
| 11211 | TCP/UDP | Memcached | Memcached |
| 27017 | TCP | MongoDB | MongoDB Database |
Look up common port numbers
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