AOL breaking dns spoof protection

Thu Aug 7 21:24:43 UTC 2003

pete at he.iki.fi ("Petri Helenius") writes:

> I´m constantly seeing responses to queries for AOL servers which come
> in from different IP addresses than the query was sent to.

due to the weakness of the 16-bit query id field, bind will throw that
stuff away.  the source address and port has to match the destination
of the query, and the question section has to be copied in its entirety.

i don't know who aol is going to be able to send responses to who won't
apply those same restrictions.