how to check if a slave zone is expired

Marc Lampo marc.lampo at
Wed May 4 07:18:56 UTC 2011



This must be a configuration error on ""

The other 3 authoritative name servers answer fine, for; returns the list of root name servers, meaning it isn't
configured to be slave for that domain.


Contact Skynet/Belgacom helpdesk to get this corrected.

Kind regards,


Marc Lampo

EURid vzw/asbl

Security Officer


From: hugo hugoo [mailto:hugobxl at] 
Sent: 04 May 2011 08:53 AM
To: bind-users at
Subject: how to check if a slave zone is expired


Dear all,
Is there a way to check that a slave zone is expired?
I use dig in the following way to see that the zone is not responding on
my server...but is this due to the fact that the zone is expired or
another problem?
dnszone002:/etc/bind/zones/slave# dig @localhost soa
; <<>> DiG 9.3.4 <<>> @localhost soa
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26868
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 13, ADDITIONAL: 0
;               IN      SOA
.                       518400  IN      NS      A.ROOT-SERVERS.NET.
.                       518400  IN      NS      B.ROOT-SERVERS.NET.
.                       518400  IN      NS      C.ROOT-SERVERS.NET.
.                       518400  IN      NS      D.ROOT-SERVERS.NET.
.                       518400  IN      NS      E.ROOT-SERVERS.NET.
.                       518400  IN      NS      F.ROOT-SERVERS.NET.
.                       518400  IN      NS      G.ROOT-SERVERS.NET.
.                       518400  IN      NS      H.ROOT-SERVERS.NET.
.                       518400  IN      NS      I.ROOT-SERVERS.NET.
.                       518400  IN      NS      J.ROOT-SERVERS.NET.
.                       518400  IN      NS      K.ROOT-SERVERS.NET.
.                       518400  IN      NS      L.ROOT-SERVERS.NET.
.                       518400  IN      NS      M.ROOT-SERVERS.NET.

- How can I see that it is because the zone is expired? 
- Is there a way to visualise all the zones that are expired (to make a
cleanup of the configuration)
Thanks for your feedback,

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