Test whether one public TCP port used by a DC++ or Direct Connect hub accepts a connection from the hublist server.
Purpose
The tool makes one bounded socket connection to the submitted public host and port. It reports the resolved addresses, connection outcome, duration, and bounded diagnostic output.
When To Use It
- Check the exact port published in a hub address.
- Test reachability when the host blocks ICMP ping.
- Verify firewall, NAT, router-forwarding, or service changes.
Reading The Results
Open means the target accepted a TCP socket from this server. Closed usually means no listener answered. A timeout can indicate filtering, routing, a stopped host, or an incorrect public address.
Limitations
A successful TCP connection does not prove that the listener speaks NMDC, NMDCS, ADC, or ADCS, and it does not complete a DC++ login. Private and reserved targets are blocked and the connection time is bounded.
For a concrete port example and next diagnostic steps, open TCP Connect.