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Port Reference
Searchable dictionary of common network ports and services
| Port | Protocol | Service | Description | Category |
|---|---|---|---|---|
| 20 | TCP | FTP Data | File Transfer Protocol data transfer | File Transfer |
| 21 | TCP | FTP Control | File Transfer Protocol control | File Transfer |
| 22 | TCP | SSH | Secure Shell, secure remote login | Remote Access |
| 23 | TCP | Telnet | Unencrypted remote login (insecure) | Remote Access |
| 25 | TCP | SMTP | Simple Mail Transfer Protocol | |
| 53 | TCP/UDP | DNS | Domain Name System queries | DNS |
| 67 | UDP | DHCP Server | Dynamic Host Configuration Protocol | Network |
| 68 | UDP | DHCP Client | DHCP client communication | Network |
| 69 | UDP | TFTP | Trivial File Transfer Protocol | File Transfer |
| 80 | TCP | HTTP | Hypertext Transfer Protocol (web) | Web |
| 110 | TCP | POP3 | Post Office Protocol v3 | |
| 119 | TCP | NNTP | Network News Transfer Protocol | News |
| 123 | UDP | NTP | Network Time Protocol | Network |
| 143 | TCP | IMAP | Internet Message Access Protocol | |
| 161 | UDP | SNMP | Simple Network Management Protocol | Network |
| 162 | UDP | SNMP Trap | SNMP trap notifications | Network |
| 389 | TCP | LDAP | Lightweight Directory Access Protocol | Directory |
| 443 | TCP | HTTPS | HTTP over TLS/SSL (secure web) | Web |
| 445 | TCP | SMB | Server Message Block (file sharing) | File Transfer |
| 465 | TCP | SMTPS | SMTP over SSL (deprecated) | |
| 514 | UDP | Syslog | System logging | Logging |
| 587 | TCP | SMTP Submission | Email message submission | |
| 636 | TCP | LDAPS | LDAP over SSL | Directory |
| 993 | TCP | IMAPS | IMAP over SSL | |
| 995 | TCP | POP3S | POP3 over SSL | |
| 1433 | TCP | MS SQL | Microsoft SQL Server | Database |
| 1521 | TCP | Oracle | Oracle Database | Database |
| 3306 | TCP | MySQL | MySQL Database Server | Database |
| 5432 | TCP | PostgreSQL | PostgreSQL Database | Database |
| 6379 | TCP | Redis | Redis key-value store | Database |
| 27017 | TCP | MongoDB | MongoDB NoSQL Database | Database |
| 9200 | TCP | Elasticsearch | Elasticsearch REST API | Database |
| 9042 | TCP | Cassandra | Apache Cassandra CQL | Database |
| 3000 | TCP | Node.js Dev | Common Node.js development port | Development |
| 4000 | TCP | Dev Server | Common development server port | Development |
| 5000 | TCP | Flask/Dev | Flask, .NET, and other dev servers | Development |
| 8000 | TCP | Django/Dev | Django and Python dev servers | Development |
| 8080 | TCP | HTTP Alt | Alternative HTTP port, Tomcat | Web |
| 8443 | TCP | HTTPS Alt | Alternative HTTPS port | Web |
| 9000 | TCP | PHP-FPM | PHP FastCGI Process Manager | Web |
| 2375 | TCP | Docker | Docker daemon (unencrypted) | Container |
| 2376 | TCP | Docker TLS | Docker daemon (encrypted) | Container |
| 6443 | TCP | Kubernetes API | Kubernetes API server | Container |
| 10250 | TCP | Kubelet | Kubernetes node agent | Container |
| 5672 | TCP | RabbitMQ | RabbitMQ AMQP | Messaging |
| 9092 | TCP | Kafka | Apache Kafka broker | Messaging |
| 4222 | TCP | NATS | NATS messaging | Messaging |
| 9090 | TCP | Prometheus | Prometheus metrics server | Monitoring |
| 3100 | TCP | Loki | Grafana Loki log aggregation | Monitoring |
| 14268 | TCP | Jaeger | Jaeger tracing collector | Monitoring |
| 4317 | TCP | OTLP gRPC | OpenTelemetry gRPC | Monitoring |
| 4318 | TCP | OTLP HTTP | OpenTelemetry HTTP | Monitoring |
| 500 | UDP | IKE | Internet Key Exchange (IPSec) | VPN |
| 1194 | UDP | OpenVPN | OpenVPN default port | VPN |
| 1701 | UDP | L2TP | Layer 2 Tunneling Protocol | VPN |
| 51820 | UDP | WireGuard | WireGuard VPN | VPN |
Showing 56 of 56 ports
About Port Reference
What is Port Reference?
Look up common network ports and their associated services. Search by port number or service name to quickly find what you need for firewall rules, troubleshooting, or documentation.
Features & Benefits
- Searchable port database
- TCP and UDP ports
- Service descriptions
- Common port presets
- Security notes included
- Quick reference cards
Frequently Asked Questions
- What are well-known ports?
- Ports 0-1023 are 'well-known' and reserved for common services like HTTP (80), HTTPS (443), SSH (22), and FTP (21).
- What's the difference between TCP and UDP?
- TCP is connection-oriented with guaranteed delivery. UDP is connectionless and faster but unreliable. HTTP uses TCP; DNS uses both.
- Why are some ports blocked by firewalls?
- Firewalls block ports to prevent unauthorized access. Only ports needed for legitimate services should be open to reduce attack surface.
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