Client banned based on IP?

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Hi All,

I have same problem, it’s for client, it will occur like every 2-3 days, the Client’s IP will be blocked for about 10 mins.

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I can solve it with iptables -F to flush all the -A rules to make the system back to work. But it will occur again definitely.

I checked web.error.log, I noticed the worker keep exit and booting, I don’t know if this is normal?

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I can flush the rules to remove the BAN or just wait a while, the ban will be released (Sometimes I didn’t do anything it will recover).

But it seems a bit annoying. I need to know what has caused the problem? How to avoid valid user IP banned by the f2b-NoNginxProxy?