DNS Pollution Cleaning: Say Goodbye to the Self-Salvation Myth of Making Users Change DNS, and Build a Server-Side Recovery and High-Defense Accelerat

When your business encounters cross-network spoofed responses, BGP route hijacking, and recursive cache poisoning by regional ISPs, instructing end users to change public DNS or configure DoH is completely ineffective in recovering lost public traffic. This article dissects the mechanisms of DNS pollution and cache poisoning from the underlying resolution chain, and explores how RockCloud's DNS pollution cleaning, seamless 301 redirects, CN2 three-network direct connection, and high-defense CDN architecture can achieve in-place business recovery and long-term anti-hijacking without changing domain names or modifying NS.