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Transparent proxy? - 14.Jul.2009 10:59:48 AM

zakfleming

Posts: 23
Joined: 10.Jul.2009
Status: offline

Hi,
I have setup an ISA box, the Server has 2 network cards. I am using the edge firewall configuration. I have configured firewall rules and traffic can happily pass through the ISA box. I have pointed the clients default gateway.

I have installed and configured Websense on the server. But it will only filter when you set the proxy address in the web browser. The setup concerned will be on a wireless network to allow students to access the internet on their personal laptops. So i cannot setup the proxy settings using group policy. I don't want to have to teach the students to setup the proxy.

I have considered pushing a .pac file using DHCP but then you have to enable automatically discover proxy settings in IE.

I want to ability for the laptops and other WIFI devices to connect up to the wireless and have a filtered inter without any configuration changes.

Does anyone know how i can make the proxy facility in ISA available transparently like you can in a Linux solution?

Thanks for your time

< Message edited by zakfleming -- 14.Jul.2009 11:08:34 AM >

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RE: Transparent proxy? - 14.Jul.2009 1:50:20 PM

richardhicks

Posts: 477
Joined: 20.Jan.2009
From: Southern California
Status: offline

This is a known issue with Websense content filtering software. You'll need to perform some additional configuration on your ISA firewall to allow Websense to filter traffic from SecureNAT clients. Take a look at my blog post on the subject:

http://tmgblog.richardhicks.com/2009/02/22/isa-securenat-and-firewall-clients-can-bypass-websense-content-filtering/

Thanks!

_____________________________

Richard Hicks - Forefront MVP
http://tmgblog.richardhicks.com/
http://directaccess.richardhicks.com/

(in reply to zakfleming)

Post #: 2

RE: Transparent proxy? - 14.Jul.2009 3:14:17 PM