Hi. I am working on a Sonicwall TZ170 that is doing web content filtering for a school. They have a smartboard running Smart Notebook software that has a tab that acts as a web browser that is trying to connect to a specific address that is being blocked with an "Access to proxy server denied" message.
So, I can see in the Content Filtering section on the Sonicwall Web GUI that under Restrict Web Features, "Access to HTTP Proxy Servers" is selected, thus the block. I want to deselect this option and save/apply changes just to see if that fixes the problem, but for some reason when i deselect the checkbox and click Apply, it says "there were no changes made". When I go to another page and back to that one, it is again selected.
Any idea what I need to do to make this config change to test that this is actually the issue? Help is greatly appreciated!