Hi, since at least "a.ntpns.org" is reachable via IPv6 it should be useful to make this test with IPv6 connected clients also. Even if the client is not using IPv6 its nameservers may be asking this way and I know that some databases (don't know if it is MaxMind) don't have accurate information to "my" IPv6 prefixes.
If you want to test manually, I could give you some of my prefixes to test with ;-) With IPv4 it seems to be accurate for me... Greetings from Wuppertal Max Am 04.12.2013 10:09, schrieb Ask Bjørn Hansen: > Hi everyone, > > In the spring I started some experiments to figure out how accurate the > "GeoIP information of DNS server" vs "GeoIP information of client IP" is. I > made a little tool that can tell you what the IP address of your DNS server > (as seen by the pool dns server) is. You can try it at http://ip.bitnames.com/ > > As you might know the DNS servers for pool.ntp.org are using the MaxMind > databases to try getting the client a "local" server (by country). I noticed > that for server IP space it's not terribly accurate (or maybe I was just > unlucky with the 4 or 5 I tried tonight). > > The development server[1] for the experiment can tell you what GeoIP > information it got for your client ip, the IP of your DNS server and for the > EDNS-SUBNET information (if you use Google DNS or OpenDNS). > > You can try that by running: > > curl -Ls http://www.mapper.ntppool.org/none; sleep 1; curl -s > http://mist.askask.com/api/v1/myip > > If you see incorrect information for some of the IP addresses, please tell > MaxMind: > > http://www.maxmind.com/en/correction > > > Ask > > [1] Whereby "server" I mean "laptop". > > _______________________________________________ > pool mailing list > [email protected] > http://lists.ntp.org/listinfo/pool > _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
