[Bug 1682499] Re: disable dnssec

[Paul Natsuo Kishimoto]

Bug #1650877 and the others linked there (see comment #7) appear to be
duplicates.

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https://bugs.launchpad.net/bugs/1682499

Title:
  disable dnssec

Status in systemd package in Ubuntu:
  Fix Committed
Status in systemd source package in Zesty:
  Fix Committed

Bug description:
  [Impact]

   * dnssec functionality in systemd-resolved prevents network access in
  certain intra and extra net cases, due to failure to correctly
  validate dnssec entries. As a work-around we should disable dnssec by
  default.

  [Test Case]

   * Validate systemd-resolved is compiled with --with-default-dnssec=no
   * Validate that systemd-resolve --status says that DNSSEC setting is no

  $ systemd-resolve --status

  good output:
  ...
    DNSSEC setting: no
  DNSSEC supported: no
  ...

  bad output:
  ...
    DNSSEC setting: allow-downgrade
  DNSSEC supported: yes
  ...

  [Regression Potential]

   * People who expect DNSSEC to be available by default will need to
  re-enable it by modifying systemd-resolve configuration file

  [Other Info]

   * See duplicate bugs and other bug reports in systemd for scenarios
  of DNS resolution failures when DNSSEC is enabled.

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