Jamie McClelland: DNS, OG of high availability

At May First, we recently received (all within a single week) three different complaints about domain names that previously worked fine suddenly not resolving to our servers. While that isn’t terribly uncommon, we discovered that in each case, the domain name’s authoritative name servers were pointing to our mail servers (a.mx.mayfirst.org, b.mx.mayfirst.org and c.mx.mayfirst.org) instead of our name servers (a.ns.mayfirst.org, b.ns.mayfirst.org and c.ns.mayfirst.org). The weird part: this mistaken configuration was happening at the registrar level, protected by each member’s own…

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