[ntp:questions] restrict: ignoring line %u, address/host '%s' unusable.

Jakob Bohm jb-usenet at wisemo.com
Wed Sep 12 07:06:01 UTC 2018

NTP 4.2.8p10+dfsg-3+deb9u2 (Debian packaged with backported security
fixes), on a dual stack (IPv4+IPv6) machine logs the following error
messages for each netmask specific restrict line, and does seem to
ignore the lines or otherwise enforce incorrect limits:

ntpd[nnnn]: restrict: ignoring line %u, address/host '%s' unusable.

Looking at github, this seems to happen when a line doesn't match the
address family (IPv4 or IPv6) of a loop iteration in the config code.

Is this a general NTP bug or did the Debian maintainer get a patch


Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
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