Qbittorrent breaks home internet network about qbittorrent HOT 10 OPEN

Try to also disable μTP. I.e. set Connection > Peer connection protocol > TCP.

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I observed the same behavior when using various P2P applications (BiglyBT, I2P, IPFS, multiple instances of qB). It took a few months before I figured out that my ISP was putting a limit on the number of connections on my connection because I have a private IP (the ISP does NAT). Of course, the ISP told me that everything is fine with them. Later I found out from him that he limits the number of connections to 1000. But his measurement of this number is somewhat strange, because my connection was already dying at 300 established connections (measured by a Mikrotik router)

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Well, qB restricts the number of connections in Settings > Connection > Global maximum number of connections, which is 500 by default iirc.

But I also inclined to belive that this is one of:

• A router is being overflown by P2P connections or has some restrictions set.
• ISP line/hardware is being overflown by P2P connections or has some restrictions. Because lets be honest, ISPs always say that there is no issues on their end.

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@a4h7 You may need to make use of global rate limits for downloading/uploading speed.

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Try to disable DHT (it doesnt use torrent limits).

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