Open Ports Tester

Our open ports tester will check your Internet IP address and detect open, or closed ports on your connection. This is useful for finding out if port forwarding or a server application is setup correctly and not being blocked by a firewall. Important to note that your ISP could be blocking some ports, such as port 25, are often an attempt to prevent malicious activity.

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Use Your IP
(separated by commas)

Common Ports:

For more list of TCP and UDP ports, check out the Wikipedia article.

Click on these ports to pre-fill the port field

20: File Transfer Protocol (FTP) Data
21: File Transfer Protocol (FTP) Command Control
22: Secure Shell (SSH) Secure Login
23: Telnet remote login service, unencrypted text messages
25: Simple Mail Transfer Protocol (SMTP) E-mail routing
53: Domain Name System (DNS) service
80: Hypertext Transfer Protocol (HTTP) used in the World Wide Web
110: Post Office Protocol (POP3)
119: Network News Transfer Protocol (NNTP)
123: Network Time Protocol (NTP)
139: NetBIOS
143: Internet Message Access Protocol (IMAP) Management of digital mail
161: Simple Network Management Protocol (SNMP)
194: Internet Relay Chat (IRC)
443: HTTP Secure (HTTPS) HTTP over TLS/SSL
1433: MSSQL
3306: MySQL
3389: Remote Desktop
5900: VNC

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