hi,
Proxies and ssl are not the greatest of friends since the session between your device and the server is encrypted. Interrupting that encryption anywhere along the way will cause problems. while ssl is good for security it does make running caching servers painful as you have to have a cert installed on every machine behind the proxy and i dont know about you but i am not able to install it on things like blu-ray players, iot devices, and anything you dont own like a device that a guest owns. blocking secure sites is not a practical solution as most of the internet sits behind ssl. thanks to organizations like Let’s Encrypt, and browsers like Chrome and Firefox trying to deprecate HTTP in favor of HTTPS.