qBittorrent always displays "Port mapping failure No router found" message? #11104

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opened 2026-02-21 21:09:16 -05:00 by deekerman · 3 comments

deekerman commented

2026-02-21 21:09:16 -05:00

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Originally created by @eyesee2020 on GitHub (Oct 23, 2020).

#13539 # qBittorrent version and Operating System
qBittorrent version 4.3.0.1 and 4.3.0.0

Windows 10 64bit version 2009 and 2004

What is the problem

qBittorrent always displays message:

24/10/20 01:54 - UPnP/NAT-PMP: Port mapping failure, message: could not map port using UPnP: no router found

Even though earlier it had found ports to listen on:

24/10/20 01:51 - Successfully listening on IP: 10.65.240.142, port: UDP/2751
24/10/20 01:51 - Successfully listening on IP: 10.65.240.142, port: TCP/2751
24/10/20 01:51 - Successfully listening on IP: fe80::34d4:b408:b53b:b7f6%19, port: UDP/2751
24/10/20 01:51 - Successfully listening on IP: fe80::34d4:b408:b53b:b7f6%19, port: TCP/2751
24/10/20 01:51 - Successfully listening on IP: fc00:bbbb:bbbb:bb01::2:f08d, port: UDP/2751
24/10/20 01:51 - Successfully listening on IP: fc00:bbbb:bbbb:bb01::2:f08d, port: TCP/2751

Is this affecting connections/speed ?

What is the expected behavior

To find router.

Originally created by @eyesee2020 on GitHub (Oct 23, 2020). #13539 # qBittorrent version and Operating System qBittorrent version 4.3.0.1 and 4.3.0.0 Windows 10 64bit version 2009 and 2004 ### What is the problem qBittorrent always displays message: 24/10/20 01:54 - UPnP/NAT-PMP: Port mapping failure, message: could not map port using UPnP: no router found Even though earlier it had found ports to listen on: 24/10/20 01:51 - Successfully listening on IP: 10.65.240.142, port: UDP/2751 24/10/20 01:51 - Successfully listening on IP: 10.65.240.142, port: TCP/2751 24/10/20 01:51 - Successfully listening on IP: fe80::34d4:b408:b53b:b7f6%19, port: UDP/2751 24/10/20 01:51 - Successfully listening on IP: fe80::34d4:b408:b53b:b7f6%19, port: TCP/2751 24/10/20 01:51 - Successfully listening on IP: fc00:bbbb:bbbb:bb01::2:f08d, port: UDP/2751 24/10/20 01:51 - Successfully listening on IP: fc00:bbbb:bbbb:bb01::2:f08d, port: TCP/2751 Is this affecting connections/speed ? ### What is the expected behavior To find router.

deekerman

2026-02-21 21:09:16 -05:00

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deekerman commented

2026-02-21 21:09:20 -05:00

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@ghost commented on GitHub (Oct 23, 2020):

If you’re using a VPN that doesn’t support UPnP then that’s the expected behaviour.

@ghost commented on GitHub (Oct 23, 2020): If you’re using a VPN that doesn’t support UPnP then that’s the expected behaviour.

deekerman commented

2026-02-21 21:09:22 -05:00

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@eyesee2020 commented on GitHub (Oct 24, 2020):

Changed Advanced Option mixed_mode_algorithm to "peer_proportional". Message no longer displayed.

No idea why !

@eyesee2020 commented on GitHub (Oct 24, 2020): Changed Advanced Option mixed_mode_algorithm to "peer_proportional". Message no longer displayed. No idea why !

deekerman commented

2026-02-21 21:09:22 -05:00

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@FranciscoPombal commented on GitHub (Oct 24, 2020):

Probably just a spurious issue then. If you run into a problem that you can reproduce (in this report, there was no actual claim that this was reproducible or steps provided to reproduce), please open a new issue report.

@FranciscoPombal commented on GitHub (Oct 24, 2020): Probably just a spurious issue then. If you run into a problem that you can reproduce (in this report, there was no actual claim that this was reproducible or steps provided to reproduce), please open a new issue report.