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Explore the implementation of Encrypted DNS (eDNS) in Red Hat Enterprise Linux as a critical component of Zero Trust Architecture in this 36-minute conference talk from DevConf.CZ 2025. Learn how RHEL integrates DNS over TLS (DoT) and other modern protocols to encrypt DNS queries from system installation through runtime operation. Discover the technical challenges and architectural decisions involved in coordinating updates across multiple components including FreeIPA, SSSD, Bind, Unbound, NetworkManager, and the newly introduced dnsconfd. Examine the significant infrastructure changes made to Anaconda, dracut, and OpenSSL to ensure encrypted DNS availability during system installation and early boot processes. Understand the complexities of certificate management for secure DNS communication in strict security environments and how RHEL enables system-wide encrypted DNS without requiring application-level modifications. Gain insights into Red Hat's roadmap for eDNS enhancements and upstream collaboration efforts as the company advances Zero Trust implementation for Linux users.
