In message <[email protected]>, Go rdon Freeman writes: > >> I'm hoping the answer is yes, so that once an NXDOMAIN response is > >> received by the name server, it will not forward repeated queries for > >> that same name, at least for as long as the negative cache TTL. > > > > Named does that by default. Not all authoritative sources however > > provide a cachable negative answer. > > But that's not what I'm seeing. If a client sends 100 queries for a > non-existent name to its nearest name server, all of them are forwarded > on up. What I want is for the name server to cache those NXDOMAIN > answers so even if a client is slamming my DNS, my server is not in turn > hammering those name servers upstream.
I suggest that you closely re-examine the query stream and the answer stream because named both consolidates multiple queries and caches negative answers. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: [email protected]
_______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list [email protected] https://lists.isc.org/mailman/listinfo/bind-users
