[ntp:questions] problem with "restrict default ignore"

Rob nomail at example.com
Fri Jul 30 09:30:28 UTC 2010

J. Bakshi <joydeep at infoservices.in> wrote:
> Hello list,
> I like to secure my ntp daemon with "restrict default ignore" but ntp stops synchronizing with this configuration; though I have restrict lines for ntp servers. My ntp.conf is simple as below
> ``````````````````````````````
> driftfile /var/lib/ntp/ntp.drift
> server 0.asia.pool.ntp.org iburst dynamic
> server 1.asia.pool.ntp.org iburst dynamic
> restrict mask nomodify notrap
> restrict default ignore
> restrict 0.asia.pool.ntp.org  notrap noquery
> restrict 1.asia.pool.ntp.org  notrap noquery
> restrict
> ```````````````````````````````````````
> ntp starts working if I remove "restrict default ignore" . Is not the restrict lines with server
> designed to work with "restrict default ignore" ? I am very much confused here, any clue please ?

It does not work because 0.asia.pool.ntp.org returns a different value
every time, so the server 0.asia.pool.ntp.org and the restrict line
with 0.asia.pool.ntp.org don't work with the same value.  The restrict
does not match the server.

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