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[Bug Watch Updater <1819345@xxxxxxxxxxxxxxxxxx>]

** Changed in: knockd (Debian)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1819345

Title:
  knockd systemd service uses After=network.target instead of network-
  online.target

Status in knockd package in Ubuntu:
  Fix Released
Status in knockd source package in Trusty:
  Invalid
Status in knockd source package in Xenial:
  Invalid
Status in knockd source package in Bionic:
  Fix Released
Status in knockd source package in Cosmic:
  Fix Released
Status in knockd source package in Disco:
  Fix Released
Status in knockd package in Debian:
  Fix Released

Bug description:
  [impact]

  the knockd systemd service file is configured to start knockd
  After=network.target, however the systemd 'network.target' only means
  network configuration has started, not completed; the interface(s)
  that knockd is configured to listen on may not even be up yet.  In
  that case, starting knockd fails.

  [test case]

  install, configure, and enable knockd on a system.  reboot the system,
  and check the logs for knockd errors about the interface not being up.
  verify knockd is not running.

  Note that since the 'network.target' dependency is essentially a race
  condition between knockd.service executing and the interface it
  listens on being configured, it may be necessary to have a more
  complex network configuration (which takes longer to fully set up) to
  more easily trigger this, such as setting up a bridge or bond with
  multiple interfaces and using dhcp and configuring knockd to listen on
  the bridge or bond interface.

  [regression potential]

  changing the systemd service dependency to use network-online instead
  of network delays when knockd starts, and regressions would be related
  to knockd not running before the network was fully configured, or not
  running at all if systemd failed to ever reach network-online target.

  [other info]

  this requires the knock systemd service file fix from bug 1799697
  also, since the knockd systemd service cannot be enabled at all
  without that fix.

  this applies only to b/c/d since t/x use upstart for service
  management, and this bug is only in the knockd systemd service file.

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