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Transparent Proxy Help >

ChrisRoss

I looking to setup a new transparent proxy at work for public internet and cannot seem to get transparent mode to work. I have deployed the Sophos Web Appliance VM. Can you added another NIC to the VA ?

The public internet is presented via an HA Pair of SonicWALL NSA 3500 and the VA is sitting on the dedicated ESXI 5.5 host.



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  • To setup Transparent proxying you need to use policy routes in your firewall/gateway router

    A policy route routes traffic to any internet bound destination for specific ports (80 443 and any other non-standards (although need to support this in SWA)) to the SWA. To be clear, this is not a NAT rule but a policy route, source and destination are not modified.

    The policy route should obviously exempt the SWA itself.

    Now if the SWA is set in transparent mode it will filter anything that it receives on those ports. 

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