Pacfile
Am I using a PAC (Proxy Auto-Configuration)?
pac file is a text file that defines a JavaScript function: FindProxyForURL(url, host). For every URL accessed by a client, the function is executed in order to determine the proxy server (if any) to use for that URL.
If you’re behind a network where internet access is only possible through a proxy and you cannot ping DNS record, there’s a good chance that a PAC is in use.
Web Cache Communication Protocol (WCCP) and Proxy Auto-Configuration (PAC) files are both techniques used to manage and optimize web traffic, but they operate in different ways.
How It Works:
A PAC file is a JavaScript file hosted on a server that defines a FindProxyForURL function. This function specifies rules for handling web requests. When a browser accesses a URL, it checks the PAC file to see if the traffic should go directly to the web or through a specific proxy.
The HTTP_PROXY, HTTPS_PROXY, and NO_PROXY environment variables are recognized by Requests for this purpose in Linux .
Get-ItemProperty -Path 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Internet Settings' | Select-Object -Property AutoConfigURL