Hi,
I see that this is the explanation:
The UTM uses HTTPS to provide user notification, perform browser authentication and secure other user interactions. By default, the UTM uses an automatically generated certificate for these HTTPS connections.
However, I have transparent proxy without SSL Decrypt/Encrypt, so we are doing only URL Filtering with Quota enabled. When user limit quota is reached UTM is trying to show Quota notification page inside HTTPS website eg. Youtube and now we have untrusted CA (don’t wanna import it into computer, mobile phones etc…) because it’s classic MITM.
The question is, when you are hitting your Quota limit, or any other notification inside HTTPS traffic that the notification appear inside HTTP. Some kind of redirect or anything?
I know about MITM, Certificates and all about that, but in this specific scenario don’t wanna have anything about certificates. No UTM CA import into any browser and so on, and only this where SSL is involved are notification pages inside HTTPS.
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