Too many connections on the same IP

[Matus UHLAR - fantomas]

On 03.03.15 11:43, Job wrote:
>during a massive DNS utilization our Bind 9.10.1-P1 seems not to resolve anymore, neither local zone.
>We shutdown one of the two nodes and all queries arrived only on one node.
>
>CPU and memory load were not too overloaded, machine was quite fine.
>
>After some fast tests, i noticed that if from clients i used an ip alias of Bind server, it worked perfectly!
>
>Only on main ip there were congestion problems, but resolving on ip aliases worked fastly!

do you have any firewall in front of your DNS server?

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