Active Mode

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.

Hub Active Mode Check

Check whether your DC++ client listening ports appear reachable from outside your network.

Enter the public hostname or IP address that other DC++ users should reach when your client runs in active mode.
Enter the TCP port configured in your DC++ client active-mode connection settings.
Optional. Enter the UDP search port from your client settings. The page records it and explains the manual check because UDP cannot be proven without a listening client reply.
Optional. Enter the secure transfer or TLS port when your client exposes a separate encrypted-transfer port.

Complete the CAPTCHA challenge to protect this form from automated abuse.

Parent Page