Port Checker Online
Online port test: check open ports on any host or IP. Test HTTP, HTTPS, SSH, FTP and custom ports with the free Port Checker.
Online port test: check open ports on any host or IP. Test HTTP, HTTPS, SSH, FTP and custom ports with the free Port Checker.
Check whether TCP ports are open on any host — HTTP (80), HTTPS (443), SSH (22) and custom ports, free in the browser.
It covers common ports such as HTTP (80), HTTPS (443), SSH (22) and FTP (21), and also lets you enter custom ports.
It is ideal for checking whether a service is available, diagnosing firewall blocks and validating server configuration.
An open port means a service is listening and accepting connections. Filtered or closed may be firewall, NAT or a stopped service.
| Term | Meaning |
|---|---|
| 80 / 443 | HTTP and HTTPS — web. |
| 22 | SSH — remote administration. |
| 25 / 587 | SMTP — outbound email. |
| 3306 / 5432 | MySQL / PostgreSQL — databases. |
| Filtered | Firewall blocks probe — different from closed (no service). |
An open port means a service is listening on it and accepting connections. A closed or filtered port does not respond, usually because no service is running or a firewall is blocking it.
You can test any port from 1 to 65535. The tool also provides a list of the most common ports, such as 80 (HTTP), 443 (HTTPS), 22 (SSH) and 3306 (MySQL).
This usually happens because of firewall rules, NAT or routing that block external access, even when the service is active internally.
The check focuses on TCP ports, the protocol used by most services such as web, email and databases.
Yes. The XploreNetHub Online Port Checker is free and runs directly in your browser.
Enter the host or IP, pick a port (80, 443, 22 or custom) and click check. The result shows whether the port is open, closed or filtered — ideal for a port test after deploy or firewall changes.