Re: DNS cache poisoning attacks -- are they real?

On Tue, 2005-03-29 at 05:37, Simon Waters wrote:

The answers from a recursive servers won't be marked authoritative (AA bit not set), and so correct behaviour is to discard (BIND will log a lame server message as well by default) these records.

If your recursive resolver doesn't discard these records, suggest you get one that works ;)

In a perfect world, this might be a viable solution. The problem is there are far too many legitimate but "broken" name servers out there. On an average day I log well over 100 lame servers. If I broke this functionality, my helpdesk would get flooded pretty quickly with angry users. HTH, Chris