Testing Transparent Proxy
The GFI WebMonitor user interface provides a test button in the Transparent Proxy settings screen. Use this feature to check if the Transparent Proxy is operational. This test checks only if the Transparent Proxy driver and modules are working well and traffic generated from the GFI WebMonitor server machine is filtered properly. It cannot guarantee that traffic coming from the internal network gets processed properly.
NOTE
This feature is not available for GFI WebMonitor installed as a plug-in for Microsoft Forefront TMGMicrosoft Forefront Threat Management Gateway. A Microsoft product that provides firewall and web proxy services. It also enables administrators to manage Internet access through policies. It is the successor of the Microsoft ISA Server and is part of the Microsoft Forefront line of business security software..
To test if traffic generated from the internal network is properly filtered by the Transparent Proxy, perform the following steps:
- Ensure the client browser is not configured to use any proxy. Also uncheck options of automatic proxy detections within browser to avoid regular proxy usage through WPADWeb Proxy AutoDiscovery protocol.. For more information refer to Configuring WPAD.
- From the client browser try to access the following URLUniform Resource Locator.:
whatismyproxy.com. GFI WebMonitor policies might block the URL and in that case the GFI WebMonitor blocking page will appear. Otherwise, the opening web site should detect that the browser is passing through the GFI Proxy. Both behaviors prove that traffic flows through GFI WebMonitor (via transparent mode). - Additionally, if you have set up logging within the GFI WebMonitor policies, you can also check the Dashboards and locate requests made by the client machine. If requests were captured and logged by the product, Transparent Proxy is configured correctly. For more information refer to Logging.