DNS/キャッシュサーバ/pdns_recursorについて、ここに記述してください。

キャッシュサーバとしてはすっきり作られている印象をもった。

-- ToshinoriMaeno 2011-07-24 09:12:12

dont-query

The DNS is a public database, but sometimes contains delegations to private IP addresses, like for example 127.0.0.1.
This can have odd effects, depending on your network, and may even be a security risk.
Therefore, since version 3.1.5, the PowerDNS recursor by default does not query private space IP addresses.
This setting can be used to expand or reduce the limitations. 

adding a default dont-query for rfc1918 ranges: