Check whether the public TCP listener configured in your DC++ client appears reachable for Direct Connect active mode.
Purpose
The tool tests the submitted public host and active-mode TCP port from outside your local network. Optional UDP and TLS fields keep the settings together and explain which parts can be checked from a web request.
When To Use It
- Switch from passive mode to active mode.
- Verify router forwarding, a local firewall, a VPN-forwarded port, or a changed public address.
- Investigate small search result sets or failed peer-to-peer downloads.
Reading The Results
An open TCP result means this server reached the listener. A closed or timed-out result points to the client, router, firewall, VPN, CGNAT, ISP filtering, or an incorrect address. An optional TLS listener is reported separately.
Limitations
The page cannot prove UDP active-search reachability without a real DC++ client reply, so the UDP value remains a manual configuration check. An open TCP port also does not prove that every peer can connect or that the client advertises the same address and port.
For forwarding examples, passive-mode context, and recovery steps, open Active Mode.