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Managing Trust Anchors for Secure DNS Operations

Learn how to configure and maintain trust anchors for secure DNS operations, including recommended practices and maintenance strategies. Presented by Matt Larson and Ólafur Guðmundsson. Recommended for DNS administrators.

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Managing Trust Anchors for Secure DNS Operations

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  1. Trust anchor configuration and maintenance Matt Larson (mlarson@verisign.com) Ólafur Guðmundsson (ogud@ogud.com) DNSOP @ IETF68

  2. Motivations • Certain Trust Anchors need to be distributed out-of-band • One universal mechanism is better than many DNSOP @ IETF68

  3. What to configure for a TA? • Public key of the trust anchor (DNSKEY) • Cryptographic hash (DS) DNSOP @ IETF68

  4. Recommendations • Use DS SHA256 as the TA configuration format. • Perform priming queries on demand and repeat when DNSKEY set expires due to TTL DNSOP @ IETF68

  5. TA Maintenance • Use the timers mechanism promoted by DNSEXT to go forward when possible • Get root key TA via trusted update mechanism (examples) • Software/OS updates • Specialized small software module checks for changes periodically DNSOP @ IETF68

  6. Next Steps • Would like DNSOP to adopt document • Open issues: • Alternate more human friendly hash than DS? • More operational recommendations ? DNSOP @ IETF68

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