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[eMTee <1644512@xxxxxxxxxxxxxxxxxx>]

I also still get reports privately about this and as I mentioned before, the observable stats of active mode clients in the wild went really bad with version 0.86x.
Something's clearly broken with MiniUPnP 3 and numerous gateways / configurations.
Above the improved error reporting I suggest re-adding the OLD_MINIUPNPC define facility, support the old interface which would provide possibility to give builds with the previous MiniUPnP to the reporting people, so comparing the improved log messages might shed some light of where's the trouble...

** Changed in: dcplusplus
       Status: New => Confirmed

** Changed in: dcplusplus
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1644512

Title:
  UPnP configuration no longer working

Status in DC++:
  Confirmed

Bug description:
  I have a BT Homehub 3 with an openreach fibre modem to connect to the
  BT infinity FTTC service. The previous version of DC++ (0.851) could
  talk to the mini MiniUPnP interface and set up an active connection.

  The system log in 0.851 is like this

  [21:23] Connectivity: Determining the best connectivity settings...
  [21:23] Connectivity: Local network with possible NAT detected, trying to map the ports...
  [21:23] Connectivity: Port mapping: Successfully created port mappings (Transfers: 15509, Encrypted transfers: 15510, Search: 51248) on the "WANDevice" device with the MiniUPnP interface
  [21:23] Connectivity: Port mapping: Failed to get external IP
  [21:25] File list <C:\Users\Brett\AppData\Roaming\DC++\files.xml.bz2> generated
  [21:26] Connectivity: Port mapping: Successfully removed port mappings from the "WANDevice" device with the MiniUPnP interface
  [21:26] Connectivity: Determining the best connectivity settings...
  [21:26] Connectivity: Local network with possible NAT detected, trying to map the ports...
  [21:26] Connectivity: Port mapping: Successfully created port mappings (Transfers: 15542, Encrypted transfers: 15543, Search: 50056) on the "WANDevice" device with the MiniUPnP interface
  [21:26] Connectivity: Port mapping: Failed to get external IP

  An active connection is successfully configured.

  The system log in 0.863 is like this

  [10:44] Connectivity (IPv4): Determining the best connectivity settings...
  [10:44] Connectivity (IPv4): Local network with possible NAT detected, trying to map the ports...
  [10:44] Connectivity (IPv6): Determining the best connectivity settings...
  [10:44] Connectivity (IPv6): All IPv6 addresses found are local; disabling connectivity
  [10:44] Connectivity (IPv4): Port mapping: Failed to initialize the MiniUPnP interface
  [10:44] Connectivity (IPv4): Port mapping: Failed to map the Transfer port (19386 TCP) with the NAT-PMP interface
  [10:44] Connectivity (IPv4): Port mapping: Failed to create port mappings
  [10:44] Connectivity (IPv4): Active mode could not be achieved; a manual configuration is recommended for better connectivity
  [10:45] File list <C:\Users\Brett\AppData\Roaming\DC++\files.xml.bz2> generated

  I get only a passive connection.

  I have been reverting to 0.851 due to this.

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