[Pool] Monitoring says my server is unreachable

Arnold Schekkerman ntp-list at mallos.nl
Wed Feb 26 15:57:08 UTC 2014


Hi Marek,

On 02/26/2014 01:15 PM, Marek Podmaka wrote:
> Also website http://keetweej.vanheusden.com/query_ntp.php says it
> cannot connect. That appears to be in Netherlands.

I am with the same ISP, indeed in the Netherlands.

> My server (92.240.244.202) 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.

NTP to your system does not work, but ping does, so it is not a routing issue and
not _all_ traffic is blocked. I have added output of traceroute as well. My
NTP-server and my workstations have no problem reaching other NTP-servers, so it is
not my ISP blocking NTP.

I hope this helps.

Arnold

$ /usr/sbin/ntpdate -q 92.240.244.202
server 92.240.244.202, stratum 0, offset 0.000000, delay 0.00000
26 Feb 16:31:23 ntpdate[29073]: no server suitable for synchronization found
$ ping 92.240.244.202
PING 92.240.244.202 (92.240.244.202) 56(84) bytes of data.
64 bytes from 92.240.244.202: icmp_seq=1 ttl=57 time=38.8 ms
64 bytes from 92.240.244.202: icmp_seq=2 ttl=57 time=38.1 ms
64 bytes from 92.240.244.202: icmp_seq=3 ttl=57 time=37.9 ms
^C
--- 92.240.244.202 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 37.968/38.327/38.837/0.370 ms

$ traceroute 92.240.244.202
traceroute to 92.240.244.202 (92.240.244.202), 30 hops max, 60 byte packets
 1  124.ae0.xr3.3d12.xs4all.net (194.109.21.13)  0.265 ms  0.278 ms  0.511 ms
 2  0.so-0-2-0.xr1.tc2.xs4all.net (194.109.5.10)  0.556 ms  0.548 ms  0.538 ms
 3  ams-001.interoute.net (195.69.144.81)  1.579 ms  1.307 ms  1.723 ms
 4  ae0-0.ams-koo-score-2-re0.interoute.net (84.233.190.2)  21.348 ms  21.329 ms
21.089 ms
 5  ae1-0.fra-006-score-1-re0.interoute.net (84.233.190.50)  21.263 ms  21.250 ms
21.069 ms
 6  ae1-0.vie-per-score-1-re0.interoute.net (212.23.43.25)  21.040 ms  21.156 ms
21.091 ms
 7  ae0-0.vie-per-score-2-re0.interoute.net (212.23.43.50)  25.976 ms  25.964 ms
25.918 ms
 8  ae1-0.bts-001-score-1-re0.interoute.net (84.233.147.13)  21.041 ms  21.008 ms
73.126 ms
 9  89.202.153.150 (89.202.153.150)  21.878 ms  22.000 ms  22.230 ms
10  121.224.240.92.in-addr.arpa.lightstorm.sk (92.240.224.121)  22.911 ms  22.909
ms  22.826 ms
11  118.224.240.92.in-addr.arpa.lightstorm.sk (92.240.224.118)  22.659 ms  22.748
ms  22.729 ms
12  kenny.oneemedia.com (92.240.244.202)  22.443 ms  22.665 ms  22.423 ms



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