Re: [squid-users] DNS Caching

> >>Good question which TTL it uses in such case. From what it looks inthe
> >>source it ignores the TTL of the CNAME record and uses the TTL of the A
> >>record. Obviously it should use the least of the two... Please file a bug
> >>report on this.

> On Fri, 23 Sep 2005, Matus UHLAR - fantomas wrote:
> >I don't think so. Is should use TTL as received, but reasonable maximum and
> >minimum values can be used.

On 23.09 23:08, Henrik Nordstrom wrote:
> The key question here is what is "TTL as received" in
>
> www.example.com ttl=60 IN CNAME server1.example.com
> server1.example.com ttl=360000 IN A 172.16.4.54
>
> when the DNS query is www.example.com A.
>
> Squids DNS cache is quite simplistic and does not cache the CNAME
> relations, only the A responses of the lookup. As a result today Squid
> uses the ttl of the A record which is not entirely correct as this ttl is
> for server1.example.com not the queried www.example.com. To conform with
> normal DNS caching it should use the least of the two I think.

Aha. This explains much.

> But I won't touch this without a bug report where to keep a diary of the
> change and preleminary patches.

I filled up http://www.squid-cache.org/bugs/show_bug.cgi?id=1404 and I hope
the description is clear enough

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Matus UHLAR - fantomas, uhlar@fantomas.sk ; http://www.fantomas.sk/
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