[squid-users] can squid deny some ips dynamically?

Hi. I am using squid 2.6 as my reverse proxy. Sometimes there are many
many requests from same ip in a very shot period ( like 100 requests/
second). is it possible to deny these ips dynamically ?
I has written a script to check access log one time per minute in cron
and add these ips into deny list. Is there a bettle way to do ?

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Thanks & Regards
Changying Li