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Directory of TCP/UDP port allocations, database endpoints, and security firewall risk profiles.
| Port | Protocol | Service | Description | Firewall Security Risk |
|---|---|---|---|---|
| 21 | TCP | FTP | File Transfer Protocol (Cleartext commands) | High (use SFTP/SSH port 22) |
| 22 | TCP | SSH / SFTP | Secure Shell remote login & encrypted file transfer | Low (protect with key-only auth) |
| 25 | TCP | SMTP | Simple Mail Transfer Protocol (MTA server-to-server) | Spam relay risk if misconfigured |
| 53 | TCP/UDP | DNS | Domain Name System name-to-IP resolution | DNS amplification DDoS vector |
| 80 | TCP | HTTP | Hypertext Transfer Protocol (Unencrypted web traffic) | Plaintext eavesdropping (Redirect to 443) |
| 123 | UDP | NTP | Network Time Protocol clock synchronization | NTP reflection DDoS target |
| 443 | TCP | HTTPS | Hypertext Transfer Protocol Secure (TLS/SSL encrypted) | Standard secure web traffic |
| 1433 | TCP | MS SQL Server | Microsoft SQL database default listener | High if exposed to public internet |
| 3306 | TCP | MySQL / MariaDB | Default port for MySQL relational databases | Never expose publicly; bind to 127.0.0.1 |
| 3389 | TCP/UDP | RDP | Microsoft Remote Desktop Protocol | Critical brute-force ransomware vector |
| 5432 | TCP | PostgreSQL | PostgreSQL database default port | Require SSL & firewall whitelist |
| 6379 | TCP | Redis | In-memory key-value data store & caching | Critical! Default no-auth allows RCE |
| 8080 | TCP | HTTP-Alt / Proxy | Secondary web server, Tomcat, Spring Boot, proxies | Often forgotten dev backdoors |
| 25565 | TCP/UDP | Minecraft Server | Minecraft Java Edition game server port | DDoS target for gaming servers |
| 27017 | TCP | MongoDB | NoSQL document database default port | High ransomware target if unauthenticated |