Port Number Lookup

FTP-DATA TCP

FTP data transfer channel.

FTP TCP

FTP control connection for commands.

SSH TCP

SSH secure remote login and SFTP.

Telnet TCP

Telnet unencrypted remote login.

SMTP TCP

SMTP mail transfer between servers.

DNS TCP/UDP

DNS domain name resolution.

DHCP UDP

DHCP server for dynamic IP assignment.

DHCP UDP

DHCP client receiving IP configuration.

TFTP UDP

TFTP simple file transfer without auth.

HTTP TCP

HTTP unencrypted web traffic.

POP3 TCP

POP3 retrieving email from a server.

NNTP TCP

NNTP Usenet news transfer.

NTP UDP

NTP network time synchronization.

NetBIOS UDP

NetBIOS name service on Windows networks.

IMAP TCP

IMAP accessing email on a server.

SNMP UDP

SNMP monitoring and managing devices.

SNMP Trap UDP

SNMP trap notifications from devices.

BGP TCP

BGP routing between autonomous systems.

IRC TCP

IRC internet relay chat.

LDAP TCP

LDAP directory service queries.

HTTPS TCP

HTTPS encrypted web traffic (TLS).

SMB TCP

SMB Windows file and printer sharing.

SMTPS TCP

SMTPS encrypted mail submission.

Syslog UDP

Syslog remote logging messages.

SMTP (Submission) TCP

SMTP mail submission from clients.

LDAPS TCP

LDAPS encrypted directory queries.

IMAPS TCP

IMAPS encrypted email access.

POP3S TCP

POP3S encrypted email retrieval.

SOCKS TCP

SOCKS proxy protocol.

OpenVPN UDP

OpenVPN virtual private network.

MS SQL Server TCP

Microsoft SQL Server database.

Oracle DB TCP

Oracle database listener.

MySQL TCP

MySQL / MariaDB database.

RDP TCP

RDP Windows remote desktop.

SIP TCP/UDP

SIP voice-over-IP signaling.

PostgreSQL TCP

PostgreSQL database.

AMQP TCP

AMQP message queue (RabbitMQ).

Redis TCP

Redis in-memory data store.

HTTP Alt TCP

Alternate HTTP / proxy port.

HTTPS Alt TCP

Alternate HTTPS port.

Elasticsearch TCP

Elasticsearch REST API.

MongoDB TCP

MongoDB database.