How can we block proxy bypass addons which run as chrome extensions using onguard agent especially for VPN solution
For proxy bypass extension using onguard agent we can check if extension is installed or not and mark the client as unhealthy. This can be done by configuring File Check Health class to check presence of proxy bypass extensions's directory. On Windows clients, chrome extensions are installed in following directory - "C:\Users\<UserName>\AppData\Local\Google\Chrome\User Data\Default\Extensions\".
Each Extension has a unique id and a directory with extension id is created in above mentioned folder. Attached snap-shots show how to check extension id, File Check health class configuration for checking presence of extension and snap-shot of OnGuard UI.
On doing the health check we can see that the client is marked as unhealthy as we have the extension enabled and in the onguard agent, we see the below message:
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