DNS Morons

These people should run Split-horizon DNS;

HostWrong IP addressReason
cm-185.138.33.205.getinternet.no::185.138.33.205IPv4-Compatible IPv6 Addresses
cm-84.211.134.91.getinternet.no::84.211.134.91IPv4-Compatible IPv6 Addresses
cm-84.215.129.189.getinternet.no::84.215.129.189IPv4-Compatible IPv6 Addresses
dns1.srv.nuigalway.ie172.16.7.142RFC 1918
ibdxbns3.duhosting.ae10.198.18.10RFC 1918
ibdxbns4.duhosting.ae10.198.18.14RFC 1918
lightning.a2hosting.com10.32.7.249RFC 1918
nhanhoa-rm.nhanhoa.com192.168.102.8RFC 1918
ns.livas.lv2001:db8::204:23ff:fec9:f26aReserved for Documentation
ns1.motianya.com192.168.1.1RFC 1918
ns1.redcondor.net172.27.134.21RFC 1918
ns1.servsd.net0.0.0.0Unconfigured
ns2.livas.lv2001:db8::21e:c9ff:fee8:8459Reserved for Documentation
ns2.motianya.com192.168.1.1RFC 1918
ns2.prtcom.com10.181.5.14RFC 1918
ns2.servsd.net0.0.0.0Unconfigured
ns3.blue.net10.11.11.210RFC 1918
ns4.tataidc.co.in64:ff9b::6708:2e05RFC 6052
proxy29.tc1.swgfl.ifl.net192.168.167.137RFC 1918
s-dns-cvt2-01.pop.ns.selectel.org172.24.87.66RFC 1918
vtelmon1.vtel.jo10.10.10.60RFC 1918

Last update: Sat 31 Jul 06:02:01 UTC 2021

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;
        // RFC 6052
        64:ff9b::/96;
        // Reserved for Documentation
        2001:db8::/32;
        // IPv6 Unique Local
        fc00::/7;
        // IPv6 Link local
        fe80::/10;
        // IPv6 Site local
        fec0::/10;
        // Your IPv6 address range(s)
        Net/Mask
    } 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.