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Cisco Bug: CSCuq37275 - Split DNS doesn't affect TCP-based DNS requests

Last Modified

Nov 27, 2020

Products (2)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases


Description (partial)

router is acting as DNS proxy and customer is trying to block DNS request coming on an interface using split-dns. It is working fine for UDP based DNS requests but it is not working for TCP based DNS queries.

Issue occurs only when dns queries are TCP based.
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