On the BIND Users list: https://lists.isc.org/pipermail/bind-users/2020-March/102820.html On Wed, Mar 25, 2020 at 05:18:49PM +0000, Drew Weaver wrote: > Did anyone else on CentOS 6 just have some DNS resolvers totally fall over? > > I noticed that this command: dnssec-lookaside auto; was causing the issue. The issue occurred right at about 1PM EST.