Reference
Port Reference
A searchable table of the ports you actually hit — filter by number, protocol or service. Covers well-known and common registered ports.
| Port | Proto | Service | Description |
|---|---|---|---|
| 20 | TCP | FTP-DATA | File Transfer — data |
| 21 | TCP | FTP | File Transfer — control |
| 22 | TCP | SSH | Secure Shell / SCP / SFTP |
| 23 | TCP | Telnet | Unencrypted remote login |
| 25 | TCP | SMTP | Mail transfer |
| 53 | TCP/UDP | DNS | Domain Name System |
| 67 | UDP | DHCP | DHCP server (BOOTP) |
| 68 | UDP | DHCP | DHCP client |
| 69 | UDP | TFTP | Trivial File Transfer |
| 80 | TCP | HTTP | Web (cleartext) |
| 88 | TCP/UDP | Kerberos | Authentication |
| 110 | TCP | POP3 | Mail retrieval |
| 123 | UDP | NTP | Network Time Protocol |
| 135 | TCP | MS-RPC | Microsoft RPC endpoint mapper |
| 137 | UDP | NetBIOS-NS | NetBIOS name service |
| 138 | UDP | NetBIOS-DGM | NetBIOS datagram |
| 139 | TCP | NetBIOS-SSN | NetBIOS session |
| 143 | TCP | IMAP | Mail retrieval |
| 161 | UDP | SNMP | Network monitoring |
| 162 | UDP | SNMP-Trap | SNMP notifications |
| 179 | TCP | BGP | Border Gateway Protocol |
| 389 | TCP/UDP | LDAP | Directory access |
| 443 | TCP | HTTPS | Web (TLS) |
| 445 | TCP | SMB | Microsoft-DS / file sharing |
| 465 | TCP | SMTPS | Mail submission over TLS |
| 500 | UDP | IKE | IPsec key exchange |
| 514 | UDP | Syslog | System logging |
| 520 | UDP | RIP | Routing Information Protocol |
| 587 | TCP | SMTP-Sub | Mail submission (STARTTLS) |
| 636 | TCP | LDAPS | LDAP over TLS |
| 853 | TCP | DoT | DNS over TLS |
| 989 | TCP | FTPS-DATA | FTP over TLS — data |
| 990 | TCP | FTPS | FTP over TLS — control |
| 993 | TCP | IMAPS | IMAP over TLS |
| 995 | TCP | POP3S | POP3 over TLS |
| 1194 | UDP | OpenVPN | OpenVPN default |
| 1433 | TCP | MS-SQL | Microsoft SQL Server |
| 1521 | TCP | Oracle | Oracle DB listener |
| 1701 | UDP | L2TP | Layer 2 Tunneling |
| 1723 | TCP | PPTP | Point-to-Point Tunneling |
| 1812 | UDP | RADIUS | AAA authentication |
| 1813 | UDP | RADIUS-Acct | RADIUS accounting |
| 2049 | TCP/UDP | NFS | Network File System |
| 3306 | TCP | MySQL | MySQL / MariaDB |
| 3389 | TCP | RDP | Remote Desktop |
| 4500 | UDP | IPsec-NAT-T | IPsec NAT traversal |
| 5060 | TCP/UDP | SIP | VoIP signalling |
| 5061 | TCP | SIP-TLS | VoIP signalling (TLS) |
| 5432 | TCP | PostgreSQL | PostgreSQL DB |
| 5900 | TCP | VNC | Remote framebuffer |
| 6379 | TCP | Redis | Redis key-value store |
| 8080 | TCP | HTTP-Alt | Proxy / alt web |
| 8443 | TCP | HTTPS-Alt | Alt HTTPS / mgmt UI |
| 9090 | TCP | Prometheus | Metrics / web UI |
| 27017 | TCP | MongoDB | MongoDB DB |
| 51820 | UDP | WireGuard | WireGuard VPN |