DNS security remains a critical concern for network infrastructure. This article explores two major attack vectors: cache poisoning, where attackers inject false DNS records to redirect traffic, and DNS tunneling, which uses DNS queries to exfiltrate data or establish covert channels. The author provides real-world detection techniques, including monitoring for unusual query patterns and implementing DNSSEC. For security engineers, understanding these threats is essential for building resilient systems. The content is practical and actionable, though it assumes basic familiarity with DNS protocols.
A practical guide to DNS cache poisoning and tunneling attacks with detection strategies.