BIND started replying to queries for .com with .COM

[Tony Finch]

Phil Mayers <p.mayers at imperial.ac.uk> wrote:
>
> What is considered the source of the ownername for, say, "com."?

It should be the root zone master file.

However authoritative server implementations differ in whether they echo
the query case or preserve the master case. e.g. a.root-servers.net
(running Verisign ATLAS) echoes case, f.root-servers.net (running BIND)
preserves case. k.root-servers.net is amusing because it runs a load
balancer in front of BIND, Knot, and NSD; Knot and NSD echo case, so
K-root's case handling behaviour is unpredictable.

Tony.
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