Yesterday one of our BIND 9.6.1-P1 servers started logging lots of messages like the following - for a number of different domains - and failing to resolve the corresponding names.
named[204]: no valid RRSIG resolving 'cvsup.au.freebsd.org/A/IN':
123.136.33.242#53
Please note that in the above instance, the zone in question is not
signed. BIND was logging this error and returning SERVFAIL to the
client.
I only noticed this this morning and spent a while trying to figure out
what was happening - to no avail. The BIND server had been running for
over two weeks with this configuration with no problem but I wondered
if, perhaps, something had gone weird with dnssec-validation. I decided
to re-start named and everything is happy again.
What should I do to troubleshoot this if it happens again?
I'm new at DNSSEC. This server is the first one we have configured.
I have the following in the global configuration options:
dnssec-enable yes;
dnssec-validation yes;
dnssec-lookaside . trust-anchor dlv.isc.org.;
I have the dlv.isc.org. key and the key for our only signed zone
(internal zone being served only via an internal view) in the
trusted-keys section of the configuration.
I'd be glad to be referred to any troubleshooting tips.
Thank you.
--
John Marshall
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