Online TCP Port Scanner

Scan a controlled TCP-port profile

The scanner tests one specific port or a fixed profile of common ports: web, mail, administration, databases or a general selection. The test runs from the Md5Decrypt infrastructure and uses full TCP connections. It does not offer a 65,535-port scan, address ranges or custom commands.

Reading the result

An open port accepts the TCP connection. A closed port replies but has no listening service. A filtered port does not reply before the timeout, commonly because of a firewall. The displayed service name is the usual assignment for that port number; it does not prove which software is installed.

Timing and limitations

Short profiles usually complete within a few seconds. A host that silently drops packets can take longer until the timeout. For a full assessment, use an authorized scanner from your own environment and compare observations from more than one network.

Authorized use only

Test only an address or domain you own or are explicitly authorized to assess. Unsolicited scanning may trigger alerts and violate the remote network’s rules.