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Heimdal™ Threat Prevention - Endpoint Enterprise and GFI Transparent Proxy

This article is destined to show, why GIF Transparent Proxy is NOT compatible with Heimdal™ Threat Prevention - Endpoint Enterprise's filtering engine.

  • GFI Proxy is mostly used in transparent proxy mode. This means the client's machines are NOT configured to use a proxy.
  • In this mode, the proxy server is placed between the local network and the internet.
  • The traffic is routed directly through a gateway and the clients connecting to the internet are filtered.
  • When Heimdal™ Threat Prevention - Endpoint Enterprise is installed on the machines, the traffic is filtered locally but it gets redirected through the same gateway GFI is using.
  • GFI effectively cancels Heimdal™’s filtering because of this. The packets never reach Heimdal’s filtering engine and the requests effectively get resolved at the gateway level and not locally.
  • Heimdal™ Threat Prevention - Endpoint Enterprise is still able to update or install software as intended but the traffic filtering will not work.


The products are simply not compatible.


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