Cisco Cisco Web Security Appliance S170 Guida Utente

HTTPS and FTP over HTTP requests still match the Identity according to the other membership criteria, 
but the Web Proxy does not prompt clients for authentication even if the Identity requires authentication. 
Instead, the Web Proxy sets the user name to NULL and considers the user as unauthenticated. 

Then, when the unauthenticated request is evaluated against a policy, it matches only a policy that 
specifies “All Identities” and apply to “All Users.” Typically, this is the global policy, such as the global 
Access Policy.

Clients on your network use Network Connectivity Status Indicator (NCSI) 

Web Security appliance uses NTLMSSP authentication. 

Identity uses IP based surrogates

A user might be identified using the machine credentials instead of the user’s own credentials, and as a 
result, might be assigned to an incorrect Access Policy.

Workaround:

Reduce the surrogate timeout value for machine credentials.

Use the advancedproxyconfig > authentication CLI command.

Enter the surrogate timeout for machine credentials. 

The Policy Trace Tool can emulate a client request and then detail how the Web Proxy processes that 
request. It can be used to trace client requests and debug policy processing when troubleshooting Web 
Proxy issues. You may perform a basic trace or you may enter advanced trace settings and override 
options. 

The policy trace tool evaluates requests against polices used by the Web Proxy only. These are Access, 
Encrypted HTTPS Management, Routing, Data Security, and Outbound Malware Scanning polices. 

SOCKS and External DLP polices are not evaluated by the policy trace tool.

When you use the policy trace tool, the Web Proxy does not record the requests in the access log or 
reporting database