Hi oleary,Well, if you do this, you can't force people to use the Web Proxy service. If people change their settings to a SecureNAT or Firewall client, they won't be redirected to the Web Proxy service, and therefore won't use the cache or the content filtering mechanisms.
However, if you're concerned about access control, you can create a Protocol Rule for TCP 443 and limit access to that protocol to certain users and groups.
HTH,
Tom
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