Configure Proxy and Exclusions Windows
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    Configure Proxy and Exclusions Windows

    • PDF

    Article summary

    This guide explains how to configure proxy settings and bypass exclusions on Windows, with attention to IP-based proxy definitions and WebSocket app compatibility.

    Common apps that rely on WebSockets:

    • Slack
    • Figma
    • Lucidchart

    These can fail when routed through proxies like Squid, which do not support wss:// connections.


    What This Script Does

    • Sets a system-wide proxy IP address via PowerShell
    • Applies exclusions for user apps (WinINET) and system services (WinHTTP)
    • Prevents proxy routing for WebSocket-based apps and Microsoft services
    • Supports deployment via Intune, GPO, or manual script execution

    Manual Configuration Steps

    1. Launch Control PanelInternet Options.
    2. Navigate to the Connections tab → LAN Settings.
    3. Enable Use a proxy server.
    4. Set:
      • Address = 192.168.1.10
      • Port = 8080
    5. Click Advanced, then add the domains below to the Exceptions list.
    6. Apply and save.

    Scripted Method (PowerShell)

    # Define proxy IP and port
    $proxyIP = "http://192.168.1.10:8080"
    
    # Define proxy bypass list
    $bypassList = "localhost;127.0.0.1;*.microsoftonline.com;*.core.windows.net;*.slack.com;*.figma.com;*.lucidchart.com;*.lucid.app;*.github.com;copilot-proxy.githubusercontent.com"
    
    # Apply proxy for system services
    netsh winhttp set proxy $proxyIP ";$bypassList"
    
    # Apply proxy for user apps
    $regPath = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Internet Settings"
    Set-ItemProperty -Path $regPath -Name ProxyEnable -Value 1
    Set-ItemProperty -Path $regPath -Name ProxyServer -Value $proxyIP
    Set-ItemProperty -Path $regPath -Name ProxyOverride -Value $bypassList
    

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