Re: DNS requests for 1918 space

Is there something special about RFC1918 in this respect? Wouldn't these resolvers not work for all of the IN-ADDR.ARPA space? Wouldn't they be hitting the roots with all kinds of PTR queries?

Good question. Certainly I do see plenty of non-1918 PTR queries as well, but I don't have good stats on that.

If he has broken resolvers, but the ISP servers are sane, he'll obviously end up pounding the ISP servers and perhaps the IANA blackhole servers if the queries are unique, but not the root servers.

Agreed. Duane W.