DNS based host objects lookup failure

Hi

We configured all our hosts as dns host objects. All NAT and fw rules based on these dns host objects. We have a forwarder pool (Availability Group) with two internal name servers (Zone with internal ip's).

Yesterday most of our server were not accessible, I checked the astaro and I saw most dns objects were resolved as the external ip!

I don't know why, maybe the master internal nameserver had a problem at this time, but why didn't the astaro fw switch to the slave nameserver?

And why can the astaro fw resolve our dns objects with the external ip?? We have only our two internal nameserver in the forwarder pool! (Fallback nameserver??)


(And for sure the problem was on sunday morning :mad:)

Thanks