Independent Network Tools

Common port query

Filter common network ports by port number, protocol or service name.

PORT

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After filling in the parameters, run directly, and the results are only displayed on the current tool page.

30 Item

Port	Protocol	Service	Use
`20`	TCP	FTP Data	FTP Active Mode Data Transfer
`21`	TCP	FTP	File transfer control connection
`22`	TCP	SSH	Secure remote login and file transfer
`23`	TCP	Telnet	Clear text remote login, it is not recommended to expose the public network
`25`	TCP	SMTP	Transport between mail servers
`53`	TCP/UDP	DNS	domain name resolution
`67`	UDP	DHCP Server	Dynamic address allocation server
`68`	UDP	DHCP Client	Dynamic Address Assignment Client
`80`	TCP	HTTP	web page access
`110`	TCP	POP3	Mail reception
`123`	UDP	NTP	network time synchronization
`143`	TCP	IMAP	Mail access
`161`	UDP	SNMP	Network equipment management
`389`	TCP/UDP	LDAP	directory service
`443`	TCP	HTTPS	Encrypted Web Access
`465`	TCP	SMTPS	Implicit TLS Mail Submission
`587`	TCP	SMTP Submission	Mail client submission
`993`	TCP	IMAPS	Encrypt IMAP
`995`	TCP	POP3S	Encrypt POP3
`1433`	TCP	SQL Server	Microsoft SQL Server
`1521`	TCP	Oracle	oracle database monitoring
`2049`	TCP/UDP	NFS	network file system
`3306`	TCP	MySQL	mysql database
`3389`	TCP/UDP	RDP	Windows Remote Desktop
`5432`	TCP	PostgreSQL	PostgreSQL database
`6379`	TCP	Redis	redis database
`8080`	TCP	HTTP Alternate	Common Web Alternate Ports
`8443`	TCP	HTTPS Alternate	Common HTTPS alternate ports
`9200`	TCP	Elasticsearch	Elasticsearch HTTP interface
`27017`	TCP	MongoDB	MongoDB database

Network port description

Quick check of common TCP and UDP ports

Filter common network ports by port number, protocol or service name, suitable for quick reference in firewall configuration, service deployment and troubleshooting.

Ports and Protocols

The same port number can be used for TCP and UDP respectively; the transport protocol must be confirmed at the same time when troubleshooting.

Default is not mandatory

The table records common default values, and the service can use other ports. The actual configuration should be based on the application and listening status.

Public network exposure

Database, cache and remote management ports should not directly expose the public network, and should cooperate with access control, authentication and encryption.

Common port query Frequently asked questions

Does an open port mean that the service is safe?

does not mean. Port open only means connectivity, and also need to check authentication, patch, encryption and minimum permission configuration.

Why can't I find a port in the table?

This page is a quick check of the commonly used ports, not the complete IANA service name registry.