Maintenance: Primary DNS resolver

Message-Id: 202107221459
Time: 22nd July 2021, 5 to 6 PM
Affected: Primary DNS gwdu01.gwdg.de (134.76.10.46)
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”.

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