[Pool] Monitoring says my server is unreachable

Thomas Rieschl admin at trinet.at
Wed Feb 26 14:48:28 UTC 2014


I tested it from three locations: Vienna, interXion; UPC at home 
(Vienna) and from Hetzner in Germany.

It works from all three locations.

btw. I had to disable the NOTRACK setting in my iptables for ntpdate to 
work, so perhaps there's a similar thing going on with your firewall?


On 26.02.2014 13:15, Marek Podmaka wrote:
> Hello,
> Today I have received report from pool that it cannot connect to my
> IPv4 server (IPv6 on the same server works OK). I guess monitoring is
> in USA.
> Also website http://keetweej.vanheusden.com/query_ntp.php says it
> cannot connect. That appears to be in Netherlands.
> My server ( is working OK, queries from clients are
> coming (about 20 packets/s currently) and NTP answering on them. I
> have tested from my other server in Germany and from there it works. I
> have also confirmed that entire subnet seems to be blocked from those
> servers/countries. My direct connectivity provider says they don't
> block it on their side.
> Any ideas how to troubleshoot further? Can you test from other
> coutries and report if can't get time from me? (monlist is blocked,
> but for example ntpdate -q should work). So it seems
> like it is blocked somewhere in the transit.

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