rqbit is acceptible to connection exhaution problem

[izderadicka]

I run into problem with rqbit, when running it as service/daemon on Linux - after about 2 days of running it I saw that there 20k connections in WAIT-CLOSE state and also a lot of connections in FIN_WAIT state. It actually brought down TCP on linux machine to pathetic performance - tens of KB/s.

My "theory" is that rqbit is accepting connections without any limitation - after while a lot of peers is trying to connect as we are visible in DHT. It's then kind of DoS TCP attack - and that was actually how I solved it - set up DoS protection on my router/fw - which rate limits number of new TCP connections.

Just wondering if something can be done in rqbit direcly - limit a rate of new incoming TCP connections.

[ikatson]

The only limit that exists right now afaik is 128 (hard coded) outgoing connections per torrent. Definitely introducing more limits, including the number of accepted connections makes sense