Hi , I have a DNS server using BIND 9.16 software. I have a phenomenon where there are many queries from different IPs to the subdomains of cosy.vn (these subdomains do not exist; the domain name cosy.vn is the main domain I am using). These queries cause an overload for my system. I have used IP blocking solution, but these IPs are many and constantly changing. I would like to ask is there a way to configure blocking of queries from those strange IPs to my subdomains?
Thanks and looking forward to your support. Chinhlk
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