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DNS times out

ciscosupp
ciscosupp asked
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Last Modified: 2017-03-21
When my DNS server is behind an ASA it sometimes times out on  (Client queries to DNS)  clients but when DNS server is not behind firewall it works fine. Port 53 tcp and udp are open to DNS server.

Any idea what issue can be.
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ciscosupp

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Commented:
DNS inspection caused the problem

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