Clients are not able to access to http://assist.cctgroup.com. When clients are configured to proxy through the SWG they receive an http 401 error. When clients are not proxied through the SWG they receive an authentication request and are able to access the site.
Client receives an http 401 unauthorized error message.
http://assist.cctgroup.com uses NTLM authentication to authenticate users. Currently the SWG does not support NTLM authentication from web sites, only basic authentication. This is documented on page 187 of the SWG Implementation Guide.
Clients should bypass the SWG when accessing any website that uses any authentication other than basic authentication. This can be done via a proxy auto-config (PAC) file or via Windows policy settings.
SWG is in proxy blocking mode.