Online TCP Port & Socket Availability Checker
Test whether network ports (80, 443, 22, 21, 3306, 8080) are open, filtered, or closed.
TCP Port Monitor
Direct TCP socket check to verify whether network services (HTTP, HTTPS, SSH, DBs) are reachable.
About the TCP Port & Socket Availability Checker
Initiates a non-intrusive TCP socket handshake to verify whether a firewall or host is accepting connections on specific network ports.
How to Use
Enter your hostname or IP address, select a common preset port (HTTP 80, HTTPS 443, SSH 22, MySQL 3306) or specify a custom port number.
Understanding Results
OPEN indicates the port is reachable; CLOSED indicates the host actively rejected the connection; TIMEOUT indicates a firewall or security group dropped the packet.
Frequently Asked Questions
Is this safe to run on my server?
Yes, it performs a standard TCP connection attempt without sending exploits or payload attacks.
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