RE: DNS Negative Caching (Harshith)

gt; When replying, please edit your Subject line so it is more specific > than "Re: Contents of bind-users digest..." > > > Today's Topics: > >1. Re: DNS Negative Caching (Chris Buxton) >2. How does named log update request (liumingxing) >3. Re: DNS Ne

Re: DNS Negative Caching

I have a feeling that the discussion regarding SOA fields didn’t really answer your question, Harshith. Yes, negative results (NXDOMAIN) are usually cached for the amount of time specified in the last field of the SOA. This field was originally named “Minimum”, but is since used for NXDOMAIN

Re: DNS Negative Caching

On Aug 28, 2015, at 5:27 PM, Barry Margolin wrote: > Note that if a server is authoritative-only, caching is mostly > irrelevant, so the negative cache TTL doesn't much apply. In this case, > the SOA Minimum is just being used as the default TTL. No, that is not correct.

Re: DNS Negative Caching

Is that really still true? I thought that use of the Minimum field went away when it was changed to be the negative cache TTL. Barry, Yes, it’s still true. If you don’t set a default TTL, then the last field of the SOA record does double duty as both a default TTL and a negative caching

Re: DNS Negative Caching

On 2015-08-28 14:15, Darcy Kevin (FCA) wrote: As you pointed out (correctly), this isn't an issue which affects anything that goes on the wire, e.g. master-slave replication via AXFR/IXFR, since, on the wire the TTL is always included with the RR. It's only an issue for how the zone files are

RE: DNS Negative Caching

. - Kevin -Original Message- From: bind-users-boun...@lists.isc.org [mailto:bind-users-boun...@lists.isc.org] On Behalf Of Matus UHLAR - fantomas Sent: Friday, August 28, 2015 3:49 PM To: bind-users@lists.isc.org Subject: Re: DNS Negative Caching On 28.08.15 17:32, Darcy Kevin (FCA

Re: DNS Negative Caching

In article mailman.2601.1440783131.26362.bind-us...@lists.isc.org, Darcy Kevin (FCA) kevin.da...@fcagroup.com wrote: What's in a name? :-) RFC 2308 said that the use of the last field of the SOA to set negative-caching TTL is the new defined meaning of the SOA minimum field. So you can

Re: DNS Negative Caching

On 28.08.15 17:32, Darcy Kevin (FCA) wrote: RFC 2308 said that the use of the last field of the SOA to set negative-caching TTL is the new defined meaning of the SOA minimum field. So you can *call* it minimum, but it is *actually* supposed to function as something else... Eventually I hope

Re: DNS Negative Caching

In article mailman.2604.1440796547.26362.bind-us...@lists.isc.org, Darcy Kevin (FCA) kevin.da...@fcagroup.com wrote: Negative-caching TTL and regular TTL have little to do with each other; it's not a reasonable assumption that one should stand in as a default for the other. True, but

Re: DNS Negative Caching

Am 27.08.2015 um 16:08 schrieb Alan Clegg: on the DNS Zone file we have these records $ORIGIN e164.arpa. @ IN SOA picardvm2.e164.arpa. e164-contacts.e164.arpa. ( 2002022404 ; serial

Re: DNS Negative Caching

on the DNS Zone file we have these records $ORIGIN e164.arpa. @ IN SOA picardvm2.e164.arpa. e164-contacts.e164.arpa. ( 2002022404 ; serial 3H ; refresh

Re: DNS Negative Caching

On 8/27/15 10:24 AM, Reindl Harald wrote: I wasn't really following this thread, but now that I see this, I would like to add that the expire timer is also used as the default TTL for resource records that do not have one specified, and if there is not an explicit $TTL statement in the zone

Re: DNS Negative Caching

In article mailman.2589.1440684547.26362.bind-us...@lists.isc.org, Alan Clegg a...@clegg.com wrote: on the DNS Zone file we have these records $ORIGIN e164.arpa. @ IN SOA picardvm2.e164.arpa. e164-contacts.e164.arpa. (

Re: DNS Negative Caching

On Tue, Aug 25, 2015 at 12:50 AM, Reindl Harald h.rei...@thelounge.net wrote: Am 25.08.2015 um 12:46 schrieb Harshith Mulky: I have a confusion on how the clients respond to and cache when particularly we receive negative replies from a DNS Server, particularly NXDOMAIN or SERVFAIL

Re: DNS Negative Caching

Am 25.08.2015 um 12:46 schrieb Harshith Mulky: I have a confusion on how the clients respond to and cache when particularly we receive negative replies from a DNS Server, particularly NXDOMAIN or SERVFAIL responses on the DNS Zone file we have these records $ORIGIN e164.arpa. @ IN SOA