On Sophos UTM 9.1, I have ntp setup to use us.pool.ntp.org. But because they rotate IP addresses in the DNS for us.pool.ntp.org, the ntpd server keeps restarting. Here is a section of the System log:
2013:06:10-14:35:21 astaro dns-resolver[4503]: Updating REF_NetDnsNtp0 :: 0.us.pool.ntp.org
2013:06:10-14:35:21 astaro ntpd[15112]: ntpd exiting on signal 15
2013:06:10-14:35:22 astaro ntpd[15408]: ntpd 4.2.6p5@1.2349 Wed May 2 12:43:20 UTC 2012 (1)
Is it possible to keep the dns-resolver from updating the us.pool.ntp.org data every 2 minutes? pool.ntp.org probably uses a short TTL and that is causing the updates.
Or maybe I should use a set of static NTP servers instead of using the pool?
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