Server Common Port
Last updated: 2018-08-01 17:55:30PDF
The following describes the common server ports. For more information on service application ports on Windows, please see Microsoft official document (Windows Service Overview and Network Port Requirements).
|21||FTP||FTP server's open port for upload and download.|
|22||SSH||Port 22 is the SSH port, used to remotely connect to Linux system servers in command-line mode.|
|25||SMTP||SMTP server's open port for sending emails.|
|80||HTTP||Used for Web services, such as IIS, Apache, Nginx, to provide external access.|
|110||POP3||Port 110 is open for POP3 (email protocol 3) service.|
|137, 138, 139||NETBIOS protocol||Port 137 and 138 are UDP ports used to transfer files via My Network Places.
Port 139: Incoming connections over port 139 attempt to obtain NetBIOS/SMB service. This protocol is used for file and printer sharing on Windows as well as SAMBA service.
|143||IMAP||Port 143 is mainly used for "Internet Message Access Protocol" (IMAP) v2, a protocol for receiving emails as the same as POP3.|
|443||HTTPS||Web browsing port. This is another type of HTTP that supports encryption and transfer over secure ports.|
|1433||SQL Server||Port 1433 is the default port for SQL Server. The SQL Server service uses two ports: TCP-1433 and UDP-1434. Port 1433 is used by SQL Server to provide external services, and port 1434 is used to send requester a response about which TCP/IP port is used by SQL Server.|
|3306||MySQL||Port 3306 is the default port for MySQL database and is used by MySQL to provide external services.|
|3389||Windows Server Remote Desktop Services||Port 3389 is the service port for remote desktop on Windows 2000 (2003) Server. You can connect to a remote server using the "Remote Desktop" connection tool via this port.|
|8080||Proxy Port||Just like port 80, port 8080 is used for WWW proxy service for web browsing. Port number ":8080" is often added when users visit a website or use a proxy server. In addition, after Apache Tomcat Web server is installed, the default service port is 8080.|