[dnsdist] Caching reverse lookups

[Alan Clegg]

On 3/19/19 4:51 PM, Jon Radel wrote:
> To add a bit more information:  It turns out to matter how I do the
> query.  If I do the query using dig 9.11.3 as shipped with Ubuntu, it
> doesn't get cached.  If I do the query with host, it does get cached. 
> Which lead me to the thought that being a bit less clever with dig
> options might help.  With the +noedns flag, bind queries are also cached.
> 
> I'd love an explanation of why this is.

DNS Cookies.   https://tools.ietf.org/html/rfc7873

AlanC