TCP: request_sock_TCP: Possible SYN flooding on port X. Sending cookies. Check SNMP counters. (Web UI port)

[FZXizzbKv7jg]

Description

dmesg shows this message

TCP: request_sock_TCP: Possible SYN flooding on port X. Sending cookies. Check SNMP counters.

for the web ui port.

Changing parameters in sysctl has no effects. It must be hardcoded in pyload (TCP Listen Backlog?). Got this error with another python based program (deluge). It doesn't cause any real problems in pyload. Anyway, it may be better to avoid this.

Debug log

Additional references

Please see https://access.redhat.com/solutions/30453

Screenshots

[GammaC0de]

TCP: request_sock_TCP: Possible SYN flooding on port X. Sending cookies. Check SNMP counters.

Where exactly do you see this error?

[FZXizzbKv7jg]

Output of

sudo dmesg

Kernel ring buffer. Manjaro Linux.

[GammaC0de]

Do you know how to make a PR to fix this?

[FZXizzbKv7jg]

Hi again.

We might clarify this quickly? I'm sorry for late reply.

My suggestion to you would be to implement an option in web interface for socket backlog size (see qBittorrent has that option). And further, increase default value to 30.

At least, the default value must be increased to 30 (default is 5 as far as I can remember).

# /usr/lib/python3.10/site-packages/pyload/webui/webserver_thread.py
# request_queue_size

    def _run_produc(self):
        bind_path = "/"
        bind_addr = (self.host, self.port)
        wsgi_app = wsgi.PathInfoDispatcher({bind_path: self.app})
        self.server = wsgi.Server(bind_addr, wsgi_app, request_queue_size=512)

I'll leave it up to you to decide. Thank you!

[GammaC0de]

👍