DNS/OpenDNSについて、ここに記述してください。

1. 公開キャッシュサーバ OpenDNS

IPアドレス：208.67.222.220, 208.67.222.222

Ciscoと関連しているのか。

$ dig i.flip.e-ontap.com @208.67.222.222
  safe

$ dig -t txt c.sub.mufj.jp @208.67.222.222
  TXT   "Your_cache_server_is_vulnerable."

https://twitter.com/#!/jedisct1/status/172024497862475776

Frank Denis ‏ @jedisct1

For the record, OpenDNS has been safe against "ghost domains" for quite some time.
Just like Unbound, a glue TTL can only decrease.

http://blog.opendns.com/2013/12/11/speed-security-safety-dns/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+OpendnsBlog+%28OpenDNS+Blog%29

Speed, Security, and Safety Through DNS
Philip Thomas

December 11, 2013

By Philip Thomas

/Thomas

1.1. query source IP アドレス

204.194.237.11=m1.lax.opendns.com
204.194.237.13=m3.lax.opendns.com
204.194.237.17=m7.lax.opendns.com
204.194.237.18=m8.lax.opendns.com
204.194.237.19=m9.lax.opendns.com
204.194.237.21=m11.lax.opendns.com
204.194.237.22=m12.lax.opendns.com
204.194.237.24=m14.lax.opendns.com
204.194.238.13=m3.dfw.opendns.com
204.194.238.17=m7.dfw.opendns.com
204.194.238.18=m8.dfw.opendns.com
204.194.238.19=m9.dfw.opendns.com
204.194.238.20=m10.dfw.opendns.com
204.194.238.21=m11.dfw.opendns.com
204.194.238.23=m13.dfw.opendns.com
204.194.238.24=m14.dfw.opendns.com
204.194.239.13=m3.mia.opendns.com
204.194.239.17-24

ふるまい: DNS/キャッシュサーバ/OpenDNS