Phishers Abuse .arpa Reverse DNS and IPv6 to Evade Defenses
🔒 Threat actors are abusing the special-use .arpa reverse DNS namespace and IPv6 reverse zones to evade domain reputation checks and email gateways. By obtaining IPv6 address space and controlling reverse DNS, attackers can create nonstandard records (for example A records under ip6.arpa) that resolve to phishing infrastructure hosted behind reputable providers like Cloudflare or Hurricane Electric. Infoblox observed short-lived, image-linked URLs that redirect through traffic distribution systems to selectively deliver phishing pages and frustrate investigation.
