> Hello Michael
> Thank you for your response. Here is a pcap file and some logs.

Hello Sami,

Your pcap shows your resolver making thousands of queries that get no responses 
(or at least the pcap does not contain them). There's not much I can say, 
beyond that this does not appear to be a problem related to BIND. You will need 
to look at your infrastructure and beyond to determine why you are not getting 
responses to your queries.

One possibility may be in your infrastructure/network, where a firewall or 
other stateful inspection device is running out of resources to make additional 
state table entries. You will need to speak with the technical support of that 
device's vendor if you need help in assessing this.

Michael
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