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Cisco Bug: CSCvt93875 - DNS response processing fails with Umbrella enabled after socket leak observed

Last Modified

Oct 13, 2020

Products (1)

  • Cisco SD-WAN

Known Affected Releases


Description (partial)

A socket leak may be observed when Umbrella DNS is enabled for DNScrypt/DNS query redirectioni

Umbrella DNS is enabled and the DNS resolution of the Umbrella domain server ( is successful but there is no route to the server IP returned. When this occurs, sockets are leaked (as seen from 'show sockets'), eventually leading to DNS response processing failures.
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