There is an error UPnP/NAT-PMP: Port mapping failure, message: could not map port using UPnP: no router found (always appears thrice with the same timestamp) in execution log (view > log > show). No other errors. The message appears when the client connects. I haven't noticed any speed or connection issues, however.
qBittorrent 3.3.12.
asked May 22, 2017 at 10:03
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1It means that there is no UPnP enabled router accessible directly from your machine. Here UPnP is used to configure Port Forwarding to your machine through the router.– AEonAXCommented May 22, 2017 at 10:37
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@AEonAX: Can I ignore this error? Are there drawbacks?– user198350Commented May 22, 2017 at 10:50
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If it works!, you can ignore.– AEonAXCommented May 22, 2017 at 10:55
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2 Answers
If you are not facing any issues you can safely ignore this message. As can be seen here.
UPnP/NAT-PMP is used here to Forward/Open ports in an upstream router to provide a connection to your machine from outside.
This port-forwarding can fail in following scenarios:
- Upstream router does not support UPnP/NAT-PMP
- UPnP/NAT-PMP is disabled on upstream router.
- No upstream router. (You are directly connected to Internet)
Port-forwarding can succeed but still in fail in following scenario:
- Double-NAT/Multiple-NAT. First level up supports UPnP/NAT-PMP but further routers do not Port-Forward to you.
Maybe this would help someone. It fixed my issues for "UPnP/NAT-PMP: Port mapping failure, message: could not map port using UPnP: no router found"
Go to qBittorrent and go to Options > Advanced > "Optional IP address to bind to" and choose "All IPv4 addresses"
