Reverse DNS queries are used to find the domain name associated with an IP address. To perform reverse DNS queries, DNS servers use a special type of record called PTR (pointer) record. A PTR record maps an IP address to a hostname in the reverse lookup zone. For example, a PTR record for the IP address 185.230.63.186 would point to the hostname unalocated.63.wixsite.com. Reverse DNS queries are useful for validating email servers, troubleshooting network problems, and identifying malicious hosts. References:
2 Ways to Perform Reverse DNS lookups in Linux - howtouselinux
Linux managing DNS servers (LPIC-2) · GitHub
LPI Linux Certification/LPIC2 Exam 202/DNS - Wikibooks
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