I'm running into a strange problem with my Astaro Active/Passive HA accessing my internal DNS server on the LAN.
My internal DNS server forwards external requests to the Astaro which in turn is configured to forward to my ISP's DNS servers. Everything works great when the Slave node is shut down (I can resolve internal and external addresses). However, when I power the slave node on, the HA agent kicks in to synchronize with the master and my LAN clients stop being able to access external addresses. Even after the nodes both switch to "ACTIVE" state, I can't resolve external names.
Further investigation shows that the internal DNS server is unable to ping the Astaro (it's gateway) and the astaro is unable to ping the DNS server on the LAN.
Everything works normally once the slave is shut down. Any ideas why the presence of the slave prevents communication between the Astaro and my internal DNS server?
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