** Bug watch added: Red Hat Bugzilla #1468192
** Also affects: cloud-init (CentOS) via
** Merge proposal linked:
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DNS queries of does-not-exist.example.com and example.invalid
Status in cloud-init:
Status in cloud-init package in CentOS:
cloud-init makes several DNS queries for does-not-exist.example.com
and example.invalid (and also some random names).
We understand that it does this to detect the kind of DNS redirection
that's done an many universities, some ISPs, and services like OpenDNS
(when used for filtering or typo correction).
However, it can be problematic in an environment where an intrusion
detection system might flag these queries as potentially malicious,
and in a system where DNS redirection is not used it unnecessarily
increases boot time.
It looks like the feature was written to make it possible to disable
it or provide specific redirection IPs, but that it never gained a
config option to control it.
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