How does /etc/resolv.conf work??
Mark_Andrews at isc.org
Mark_Andrews at isc.org
Thu Nov 28 13:05:01 UTC 2002
>
> Hi,
>
> When a name can not be resolved by my first DNS (because it is not in the RR)
> ,
> will it also try to resolve in my second, third DNS?? Since all the three has
>
> the same configuration and they are defined in the /etc/resolv.conf.
> If it is, that will be stupid, it will cost unnecessary CPU load.
> Can somebody tell me who the resolv.conf works??
>
> Please let me know,
>
> Regards,
>
> John
No. The resolver assumes that all nameservers have the *same*
view of the world.
Mark
P.S. Lack of a record doesn't stop the name resolving. A resolver
will return a negative answer (NXDOMAIN/NODATA). REFUSED / SERVFAIL
/ NOTIMP and timeout cause the resolver to move to the next server.
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews at isc.org
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