Maintained by: NLnet Labs

[Unbound-users] Inconsistent problems when resolving

Stephane Bortzmeyer
Wed Dec 12 09:53:01 CET 2012

On Tue, Dec 11, 2012 at 11:57:29AM +0100,
 Stephane Bortzmeyer <bortzmeyer at> wrote 
 a message of 28 lines which said:

> When trying to get the IP address of, Unbound has an
> inconsistent behaviour. Sometimes, it works, sometimes it servfails.

After more investigation:

* the domain is delegated to two broken Web load balancers, probably Radware
Alteon (tested with another Alteon boxes)
* a DANE extension is installed in my Firefox and sends requests for
* The incorrect response to these requests (NXDOMAIN but without a
SOA) seems to trigger the problem