Is it Possible to Configure Upstream Proxy?
Question: We have deployed Web Safety within our LAN but according to the corporate policies it needs to utilize upstream proxy and thus cannot go direct to the Internet. How to configure it in Admin UI?
Answer: To configure upstream proxy settings, open Admin UI / Squid / Cache / Upstream Proxy page. Type the IP address of your upstream proxy into the Proxy Address textbox, enable it and click Save and Restart (we use 10.1.2.3 just as an example).
The application will then generate the following settings into squid.conf.
You can read more info at Cache Hierarchy page in Squid documentation.