Generally Accepted Values
michael at kjorling.com
Fri Oct 5 10:38:07 UTC 2001
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A question that arose when I was reading this document more carefully:
It specifies setting the SOA MINTTL to 2 days (172800). However, it is
also mentioned that this value is used as the default TTL - which is
not the BIND 9 way. I have TTLs specified for all RRs anyway (mostly
through $TTL directives, but some overrides those as well) - and that
we are going through a transition period to using the MINTTL as a
negative caching TTL.
My question is - what would be a reasonable negative caching TTL for
zones that do not change very often? As far as I have understood
NXDOMAIN responses are only given if the authorative server does not
find the requested resource record, so the possibility of any other
cause for a NXDOMAIN response can probably be ruled out.
I have a few zones that change very rarely - I have been working on
them lately but last time I made any significant changes was when one
of my secondaries was down for an extended period of time.
Any suggestions as to what value to use?
On Oct 3 2001 12:42 +0100, James Raftery wrote:
> On Mon, Oct 01, 2001 at 11:46:30AM -0700, Chris Parker wrote:
> > What are the generally accepted values for Refresh, Retry, Expire, and TTL
> > for a domain that is not expected to change in the foreseeable future?
> http://www.ripe.net/ripe/docs/ripe-203.html should be a reasonable
> starting point.
Michael Kjörling -- Programmer/Network administrator ^..^
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Internet: michael at kjorling.com -- FidoNet: 2:204/254.4
"There is something to be said about not trying to be glamorous
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(Joyce Sequichie Hifler, September 13 2001)
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