I have been having odd issues like this as well..  Where according to stats
my server is not available and score drops.  But not having any issues with
wan connectivity, and no devices internally are having issues with the ntp
server.

I keep meaning to setup a box outside to sync to it and log to see if it
loses any packets..  I too sent an email to ask, but haven't gotten
anything back.  I think its something with the monitoring or their network
connection.

What points me to something in their connectivity vs mine is that while
they will show problems with the ipv4 server, the ipv6 which is just a he
tunnel over the same ipv4 network shows no problems at the same time.  If I
had a problem with my server or my ipv4 the ipv6 should fail as well.

On Tue, Jul 5, 2016 at 1:32 PM, George R. Kasica <[email protected]>
wrote:

> Starting on about 6/14/16 at around 0400 local time (Central Daylight Time
> US UTC-6) all 5 of our time servers here can't be reached by the Status
> polling servers apparently. Yes if I put up tcpdump on the Linux hosts and
> do a packet capture on port 123 I can see traffic from many other hosts
> coming into all 5 of the systems here and no one is reporting any outages
> (including where I'm employed that used them and monitors them - they were
> unreachable we'd have pages going off within 5-10 minutes).
>
> There is no firewalling that would block by IP or port for port 123 and
> nothing has changed here for set up at that time to cause them to suddenly
> drop out.
>
> Is there some way I can see what the Pool Status polling is looking like
> from the NTP Pool end to get more of a clue as to why this has suddenly
> started to fail? I've sent email to Ask but haven't yet received a reply.
>
> George
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