Search Again: Re: Caching "No such record"? From: Len Conrad Date: Friday, November 2, 2001 Time: 9:30:59 am >If a lookup fails, there being no such record for the host name lookup up, >is this cached and will subsequent lookups of that host name return the >cached "NO such record" response? aka "negative caching". >For example, If I do a recursive lookup on something via a >non-authoritative server and, as a result, realize I've forgotten to add a >particular record to the zone, after adding it to the zone on my >authoritative server, will lookups done via the same non-authoritative >server continue to come up empty until the cache is flushed or the server >restarted (or the TTL elapses)? If the DNS you are using does negative caching, yes. The cached negative answers will have to expire in the DNS before the DNS will query for new records. Len ___________________________________________________________________ Men & Mice: QuickDNS - DNS Expert - DNS Training - DNS Consulting DNS Classes: Toronto 10/18-19, Fairfax VA 10/35-26, Frankfurt 11/21-23 London 11/26-28, Maidenhead 10/31-11/2 http://MenAndMice.com/DNS-training

Messages In This Thread: Caching "No such record"? by Warren Michelsen on Nov 2, 2001 at 8:15:49 am Re: Caching "No such record"? by Len Conrad on Nov 2, 2001 at 9:30:59 am Re: Caching "No such record"? by Warren Michelsen on Nov 2, 2001 at 10:00:12 am Re: Caching "No such record"? by Len Conrad on Nov 2, 2001 at 12:01:34 pm Re: Caching "No such record"? by Warren Michelsen on Nov 2, 2001 at 3:21:29 pm Re: Caching "No such record"? by Men & Mice Support on Nov 2, 2001 at 7:13:07 pm