DNS over TLS
DNS over TLS (DoT) is a security protocol that encrypts DNS queries and responses using Transport Layer Security (TLS) to prevent eavesdropping, tampering, and man-in-the-middle attacks. It operates on a dedicated port (TCP 853) and ensures that DNS traffic between a client and a resolver is confidential and authenticated. This enhances privacy and security compared to traditional plaintext DNS.
Developers should learn and use DNS over TLS when building applications that require enhanced privacy, security, or compliance with data protection regulations, such as in financial, healthcare, or government sectors. It is particularly useful for securing DNS traffic in untrusted networks (e.g., public Wi-Fi) and for implementing secure name resolution in IoT devices, mobile apps, or enterprise systems to prevent DNS-based attacks like spoofing.