Cisco AnyConnect VPN - mus.cisco.com Traffic

[jimbo_01]

We are currently using Cisco AnyConnect VPN client on Win10 machines for remote access and Cisco ISE providing 802.1x services on the LAN. The problem we are seeing is the Win10 Cisco AnyConnect clients are creating lots of connections to mus.cisco.com on the LAN causing unnecessary noise/traffic on the network from around 15k+ clients. I understand mus.cisco.com is used as part of Cisco Web Security Appliance, a product we do not use within our environment. 

Please can someone advise how this behaviour can be disabled on the Cisco AnyConnect Client?

[Daviddors]

See https://bst.cisco.com/bugsearch/bug/CSCvu39643?rfs=qvlogin.

Since application is generating this traffic on its own initiative, I'd consider DNS server management (ie. Filtering policies) to prevent further impact over the network.