If authentication is not enabled on the ProxySG, can policies still be written to control client access to web content?

When authentication is not enabled on the ProxySG, it is indeed still possible to write policies that control client access to web content, but these policies are limited to external criteria. This means that the policies can be based on factors such as IP addresses, URLs, protocols, and other non-user-specific parameters.

For instance, administrators can create rules that allow or block access to certain websites based on the source IP address or the requested URL. This allows for a level of access control without user-specific authentication being required. However, the lack of authentication means that the policies can't utilize user identity or attributes as decision points, which would allow for more granular control over access that takes individual users into account.

Using internal criteria would imply utilizing user account information, which is not applicable here since authentication is turned off. Thus, while policy control is possible without authentication, its scope is restricted to more generic, external conditions rather than specifics tied to individual users.