DNS Morons

These people should run Split-horizon DNS;

HostWrong IP addressReason
dns01.hb.chinamobile.com192.168.20.2RFC 1918
dns02.hb.chinamobile.com192.168.22.2RFC 1918
dracon.hts.ru10.0.17.89RFC 1918
hertz.xl.net.id64:ff9b::ca98:fef6RFC 6052
ibdxbns3.duhosting.ae10.198.18.10RFC 1918
ibdxbns4.duhosting.ae10.198.18.14RFC 1918
mx1.semrush.net10.7.0.37RFC 1918
ns01.interligainternet.com.br172.16.0.34RFC 1918
ns1.motianya.com192.168.1.1RFC 1918
ns2.motianya.com192.168.1.1RFC 1918
ns3.tataidc.co.in64:ff9b::6708:2d05RFC 6052
ns4.tataidc.co.in64:ff9b::6708:2e05RFC 6052
ns5.tataidc.co.in64:ff9b::6708:2c05RFC 6052
ns.mixnet.ua192.168.254.65RFC 1918
snbdc-dns1.xl.net.id64:ff9b::70d7:25b6RFC 6052
snbdc-dns2.xl.net.id64:ff9b::70d7:25b7RFC 6052
socrates.xl.net.id64:ff9b::ca98:fef5RFC 6052

Last update: Sun 16 Dec 07:02:01 UTC 2018

Block

You can block answers like these with Bind's 'deny-answer-addresses' feature;

    deny-answer-addresses {
        // Unconfigured
        0.0.0.0;
        // RFC 1918
        10.0.0.0/8;
        172.16.0.0/12;
        192.168.0.0/16;
        // RFC 3927
        169.254.0.0/16;
        // IPv6
        // :: to ::ffff:ffff:ffff.
        // Includes ::, ::1, IPv4-Compatible IPv6 Addresses ::/96,
        // and IPv4-mapped IPv6 addresses ::ffff:0:0/96
        ::/80;
        // IPv6 Link local
        fe80::/10;
        // RFC 6052
        64:ff9b::/96;
    } except-from { "Your.Domain"; };
    deny-answer-aliases { "Your.Domain"; };

The produces log entries like;

Aug 21 19:31:01 sput named[1601]: answer address 10.0.0.100 denied for spacefon.com/A/IN

Not blocking these addresses can be a serious security risk.