slack.com DNSSEC Outage: 2021-09-30
Date: September 30, 2021
This page gives some details on the slack.com partial DNSSEC outage on September 30, 2021.
The outage was discussed on Twitter. Among other tweets:
"If I'm reading this right, Slack's DNS admins may have caused a sitewide outage; they apparently enabled DNSSEC (DS + keys), then disabled (pulling DS + keys), but the DS is cached and DNSSEC-aware resolvers freak out when they can't find the keys." — Thomas H. Ptacek (@tqbf)
"Slack tried to enable DNSSEC, and then tried to revert, taking their zone down. lists.dns-oarc.net/pipermail/dns-... This one is fixable! Use a resolver that doesn't break for DNSSEC! 22.214.171.124 is a good one. It also comes in DoH!" — Filippo Valsorda (@FiloSottile)