You need to remove the X-Bluecoat-Via header from a specific location in Cloud SWG (formerly known as WSS) so that this information is not transferred by the proxy. This article describes how to do this for Universal Policy Enforcement (UPE) configuration. If this needs to be done for Cloud SWG tenants managed via the Portal, the configuration change needs to be carried out by Symantec Technical Support.
Symantec Universal Policy Enforcement (UPE)/Management Center.
define condition BC_ocs_fix_broken_by_via_header