Time: 22nd July 2021, 5 to 6 PM
Affected: Primary DNS gwdu01.gwdg.de (188.8.131.52)
Impact: No resolving of DNS requests by the primary DNS resolver for 1 min and no new DHCP leases.
Due to critical security issues, our primary DNS resolver needs to be updated. As the primary resolver is a cluster of 2 systems, a short “hiccup” is only to be expected when “panning”.