This article explains how to simulate a web proxy connection on the P8.
SSH to the P8
Telnet <LAN IP of P8> 3128
Issue a connect statement "CONNECT <url>:443 HTTP/1.0". E.g CONNECT outlook.office365.com:443 HTTP/1.0
- Hit 'enter' and 'enter" again.
You should see something similar to "HTTP/1.1 200 Connection established" if not the text returned will be indicative of the issue connecting to the website.