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The Graveyard - Products No Longer Supported => D-Link NetDefend Firewalls => Topic started by: lezde716 on February 22, 2010, 05:28:26 PM

Title: packet filtering
Post by: lezde716 on February 22, 2010, 05:28:26 PM

We have dfl-800 in the office purchase last Dec. 2009. We purchase this because we want to block the specific url. Right now our dfl-800 is configured to filter a web. but the problem is when the user put a proxy bypassing firewall can connect to the url that I'd block. I search the "How to Stop bypassing Proxy server"  and the answer that I've got is to "configured the packet filtering".

 what do you think the answer that I've got, this is right?

anyone can teach me to to do this in our dlf-800.

Ip=192.168.0.1
lannet=192.168.0.0/24

firmware=2.26.00.06-12649

Title: Re: packet filtering
Post by: chechito on February 23, 2010, 07:34:42 PM

some IDP singatures detect proxy http conection, but if the client uses encryption the IDP will not catch him.

Using opendns you can block proxy sites and anonymous browsing sites.

You may have to restrict a lot the access to minimize the possibility of user connects to external proxy server.

Monitoring and logging activities may give you more information about behavior of users and better strategies to apply

Title: Re: packet filtering
Post by: lezde716 on February 26, 2010, 12:49:25 AM

thanks chechito...

I read some post in other forums about the "transparent mode proxy". Just followup to my post, Is there a way that I can configure my dfl-800 to this "transparent mode proxy"?

can someone help me where can I get the guide on how to configured this to my firewall.

thank you...