TTL in DNS cache-only
Barry Margolin
barmar at alum.mit.edu
Sat Oct 28 04:12:52 UTC 2006
In article <ehtlhb$25pj$1 at sf1.isc.org>,
"afaf el maayati" <eafaf at hotmail.com> wrote:
> Hello;
>
> I have a question about the time during a DNS Server (DNS cache-only) can
> keep information in its memory, This duration corresponds to the TTL as
> mentioned in the authoritative DNS server, or the DNS server has its own
> duration?
The TTL returned by the authoritative server is the maximum time the
record may be cached. Of course, servers may discard information sooner
than this; for instance, if a BIND server is restarted it discards
everything in the cache, even though it hasn't reached the TTL.
--
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***
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