These people should run Split-horizon DNS;
| Host | Wrong IP address | Reason |
|---|---|---|
| cm-185.138.33.205.getinternet.no | ::185.138.33.205 | IPv4-Compatible IPv6 Addresses |
| cm-84.211.134.91.getinternet.no | ::84.211.134.91 | IPv4-Compatible IPv6 Addresses |
| cm-84.215.129.189.getinternet.no | ::84.215.129.189 | IPv4-Compatible IPv6 Addresses |
| dns1.srv.nuigalway.ie | 172.16.7.142 | RFC 1918 |
| ibdxbns3.duhosting.ae | 10.198.18.10 | RFC 1918 |
| ibdxbns4.duhosting.ae | 10.198.18.14 | RFC 1918 |
| lightning.a2hosting.com | 10.32.7.249 | RFC 1918 |
| nhanhoa-rm.nhanhoa.com | 192.168.102.8 | RFC 1918 |
| ns.livas.lv | 2001:db8::204:23ff:fec9:f26a | Reserved for Documentation |
| ns1.motianya.com | 192.168.1.1 | RFC 1918 |
| ns1.redcondor.net | 172.27.134.21 | RFC 1918 |
| ns1.servsd.net | 0.0.0.0 | Unconfigured |
| ns2.livas.lv | 2001:db8::21e:c9ff:fee8:8459 | Reserved for Documentation |
| ns2.motianya.com | 192.168.1.1 | RFC 1918 |
| ns2.prtcom.com | 10.181.5.14 | RFC 1918 |
| ns2.servsd.net | 0.0.0.0 | Unconfigured |
| ns3.blue.net | 10.11.11.210 | RFC 1918 |
| ns4.tataidc.co.in | 64:ff9b::6708:2e05 | RFC 6052 |
| proxy29.tc1.swgfl.ifl.net | 192.168.167.137 | RFC 1918 |
| s-dns-cvt2-01.pop.ns.selectel.org | 172.24.87.66 | RFC 1918 |
| vtelmon1.vtel.jo | 10.10.10.60 | RFC 1918 |
Last update: Sat 31 Jul 06:02:01 UTC 2021
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.