[technology taskforce] Slack Engineering Blog : The Case of the Recursive Resolvers (What Happened During Slack’s DNSSEC Rollout)

"On September 30th 2021, Slack had an outage <https://status.slack.com/2021-09-30> that impacted less than 1% of our online user base, and lasted for 24 hours. This outage was the result of our attempt to enable DNSSEC — an extension intended to secure the DNS protocol, required for FedRAMP Moderate <https://csrc.nist.gov/projects/risk-management/sp800-53-controls/release-sea...> — but which ultimately led to a series of unfortunate events." https://slack.engineering/what-happened-during-slacks-dnssec-rollout/