DNS
3 posts tagged DNS.
The network failures that present as success
Most AWS networking incidents announce themselves with a timeout. A smaller set return a valid answer and do the wrong thing, and every diagnostic instinct that works on the first kind has nothing to grab on the second.
Networking5 minA Resolver rule outranks your private hosted zone, and TTL 0 is the tell
Two DNS sources can claim the same domain in one VPC. The Resolver rule wins at equal specificity, the hosted zone is never consulted, and the only visible difference in the answer is a TTL that does not match.
Networking4 minAn interface endpoint with private DNS off is a bill with no benefit
It costs the same per hour as one that works, reaches available, passes every reachability check, and nothing routes to it. The Terraform default is false, which is most of why this ships.
Networking4 min