Actually he said the DNS protocol allows for it and ISC had been considering adding it.
-Ben Croswell On Sep 27, 2011 11:38 AM, "Issam Harrathi" <[email protected]> wrote: > As i test it's not cached at all, and you say here it's cached for 30 > seconds?! > i'm using 9.7.2-P3. > > 2011/9/27 Evan Hunt <[email protected]> > >> > I discover that servfail are not cached. is it normal? >> >> Yes, that's normal. >> >> Temporary negative caching of SERVFAIL responses for a limited period (up >> to 30 seconds, if I recall correctly) is permitted by the DNS protocol, >> and we've discussed implementing it in BIND9, but haven't had time yet. >> >> -- >> Evan Hunt -- [email protected] >> Internet Systems Consortium, Inc. >>
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