default dns config change causing major poolpah

[Randy Bush]

> in addition nowhere does it state in RFC2870 that the root-servers have to
> accept AXFR's as part of their service.

in fact, the opposite

   2.7 Root servers SHOULD NOT answer AXFR, or other zone transfer,
       queries from clients other than other root servers.  This
       restriction is intended to, among other things, prevent
       unnecessary load on the root servers as advice has been heard
       such as "To avoid having a corruptible cache, make your server a
       stealth secondary for the root zone."  The root servers MAY put
       the root zone up for ftp or other access on one or more less
       critical servers.

randy