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The best way to deal with bot net is combine LiteSpeed with firewall like iptables, when you set connection soft/hard limit properly, litepseed will log those IP that reaches those limits, those IPs are mostly member of the bot net or people trying to abuse your server. LiteSpeed does block them automatically, however, block them at firewall is better.
A script called "fail2ban" is nice tool which can automate this for you. it can parse the LiteSpeed log file and extract offending IPs, block them automatically. CSF has similar feature, what you need to do is to configure a regular expression to match log entry.
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