Port Checker
Test whether a TCP port is reachable on any host or IP address.
The Port Checker attempts a TCP connection to a host and port and reports whether the port is open, refused or timed out. It is useful for verifying services, firewalls and remote endpoints.
How to use
- Enter a hostname or IP address and a port.
- Start the check and wait for the connection result.
- Read the open or closed status together with the response time.
Frequently asked questions
What does a timeout mean?
A timeout means the host did not answer within the connection window, which often indicates a firewall or unreachable network.
Can I check local network addresses?
Yes, private and local addresses can be entered.
Is this an active scan?
It only tries one TCP connection for the requested port.
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