server-side TCP check
Port Checker
Test whether a TCP port is open, closed or filtered on a public host. The check runs from our server, so it reflects external reachability.
Checks a single TCP port from navanem.com to a public host. Private and reserved addresses are blocked. A timeout usually means a firewall is dropping the connection.
About this tool
This port checker opens a TCP connection from our server to the host and port you enter and reports whether the port is open, closed or filtered. Because the check runs from navanem.com rather than your machine, it reflects whether a service is reachable from the public internet.
Open means a service accepted the connection; closed means the connection was refused; a timeout usually means a firewall is silently dropping traffic. Private and reserved addresses are blocked so the tool cannot be used to probe internal networks.
Frequently asked questions
Is this checking from my computer?+
No. The connection is made from our server, so it tests external reachability. To test from your own network, use a local tool such as Test-NetConnection or nc.
What does a timeout mean?+
No response within a few seconds. That typically means a firewall is dropping packets to that port, as opposed to a closed port that actively refuses the connection.
Can I scan a private or internal IP?+
No. Private, loopback and reserved addresses are blocked, so the checker only works against public hosts.