Hi, we have successfully implement transparent proxy using WCCP on WCG but we're having an issue.
It happens randomly on some users and at random time, where the browser is prompting request for credential (windows username/password) while we're trying to access either internal/external web. We have checked that it doesnt related to the browser type as it occurs on most type of browsers that commonly used by our users (IE, firefox, and chrome). Strangely, this issue will not occur if we set the browser to use explicit proxy.
We are using WCG with IWA as the authentication method. Our interception point is at cisco 4500 that is directly connected to the WCG.
Please advise how to solve this, thank you.