On Thu, May 08, 2008 at 10:01:36PM -0400, Barry Margolin <barmar at alum.mit.edu> wrote a message of 26 lines which said: > > I believe OpenDNS does this. > > Only if you ask for it in your account preferences. No. Rewriting the NXDOMAIN is on by default (try yourself 208.67.222.222 from an unregistered machine) and you must turn it off if you have an account.