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Cisco Bug: CSCvu73467 - Umbrella DNS protection disabled after enabling dynamic IPv6 config on NIC (with IPv6 DNS server)

Last Modified

Aug 17, 2020

Products (1)

  • Cisco AnyConnect Secure Mobility Client

Known Affected Releases


Description (partial)

Umbrella DNS protection no longer works after enabling (and receiving) dynamic IPv6 configuration on a network interface.

- The interface already has IPv4 connectivity, including IPv4 DNS server. 
- The dynamic IPv6 configuration includes at least one IPv6 DNS server.
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