Common port reference
How to use this table
The ports below are common conventions. Applications may use other numbers; an open port does not identify software or version. Confirm the protocol and service documentation before creating rules. This site’s checker tests TCP only.
Web and administration
22 TCP — SSH; 80 TCP — HTTP; 443 TCP — HTTPS; 443 UDP — QUIC; 3389 TCP/UDP — RDP. Protect administrative interfaces with VPNs or restrictive rules.
Email and DNS
25 TCP — server-to-server SMTP; 465 TCP — submission with implicit TLS; 587 TCP — message submission; 110/995 TCP — POP3/POP3 with TLS; 143/993 TCP — IMAP/IMAP with TLS; 53 TCP/UDP — DNS. Connection acceptance proves neither authentication nor delivery.
Databases and games
1433 TCP — Microsoft SQL Server; 3306 TCP — MySQL; 5432 TCP — PostgreSQL; 6379 TCP — Redis; 27017 TCP — MongoDB; 25565 TCP — Minecraft Java. Do not expose databases directly without need. Games may require additional UDP ports; check the documentation for your edition and version.
| Port | Protocol | Service |
|---|---|---|
| 20/21 | TCP | FTP |
| 22 | TCP | SSH |
| 23 | TCP | Telnet |
| 25 | TCP | SMTP |
| 53 | TCP/UDP | DNS |
| 67/68 | UDP | DHCP |
| 80 | TCP | HTTP |
| 110 | TCP | POP3 |
| 123 | UDP | NTP |
| 143 | TCP | IMAP |
| 443 | TCP | HTTPS |
| 445 | TCP | SMB |
| 465 | TCP | SMTPS |
| 587 | TCP | SMTP Submission |
| 993 | TCP | IMAPS |
| 995 | TCP | POP3S |
| 1433 | TCP | SQL Server |
| 1521 | TCP | Oracle DB |
| 3306 | TCP | MySQL/MariaDB |
| 3389 | TCP/UDP | RDP |
| 5060/5061 | TCP/UDP | SIP |
| 5432 | TCP | PostgreSQL |
| 5900 | TCP | VNC |
| 6379 | TCP | Redis |
| 8080 | TCP | HTTP (alternate) |
| 8443 | TCP | HTTPS (alternate) |
| 27017 | TCP | MongoDB |
| 25565 | TCP | Minecraft (Java) |
| 19132 | UDP | Minecraft (Bedrock) |
| 27015 | TCP/UDP | CS, Team Fortress, Source |
| 7777 | UDP | ARK: Survival |
| 2456-2458 | UDP | Valheim |
| 3074 | TCP/UDP | Call of Duty |
| 3659 | UDP | EA/Origin (FIFA) |
| 443 | UDP | QUIC / HTTP/3 |