RE: Detecting a non-existent domain

[alex () yuriev com]

> The answer so far seems to be to query *.TLD, nab all the records, 
> and then compare them all the results you get back from querying the 
> domain.  If there is anything that doesn't match, you are in the 
> clear.  (Modulo internal networks and localhost and all those fun 
> tricks of course--but that's a different problem.)
>
> The fact that this is a single IP comparison with Verisign today 
> presumably does not preclude the wonders of MX records, CNAME's, 
> multiple A records and all of that in the future.

Alg 101

1. Seed the isWildCard[] probability array.

Generate N random strings. Attach ".NET" or ".COM" to them.  Get records for
them. Compare records to each other assigning them probability of being a
wildcard based on the repetitiveness of the data.

2. Query domain name in question.

Compare the result with isWildCard[] probability array.


Alex