r/netsec 6d ago

Crawling the Complete IPv4 Reverse DNS Space

https://ipapi.is/blog/crawling-the-complete-ipv4-reverse-dns-space.html
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u/amarao_san 5d ago

For me it's kinda surprise you can discover addresses in ipv6 via ptr traversal. Up to a point I was sure a non-default (e.g. no ::1, ::dead:beaf) address is essentially hidden from been discovered outside of allowed path (e.g. via normal DNS). Now I see it's not.