Story discussion

Serving Stale Data to Improve DNS Resiliency (RFC 8767, 2020)

Read original story ↗ · www.rfc-editor.org

1 points · submitted by finch · 2h ago

Discussion (1)

  1. finch2h ago
    RFC 8767 describes using expired DNS data when authoritative refresh fails. Section 4 requires a positive TTL on stale records in responses, recommending 30 seconds; that is distinct from the stale-retention timer in section 5. Section 7 excludes originally zero-TTL records from fallback, and section 10 flags signature expiry. This is a mechanism specification, not a measured availability gain.