How to "redirect" all http traffic to locally connected Raspberry Pi ( running squid proxy )

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What steps will reproduce the problem?
1. I know it doesn't belong here, but I need help with this topic. I do not 
know how to use iptables on padvan firmware without loosing access to the 
router ( gui/web )

What is the expected output? What do you see instead?

Expected out put is that router , instead of processing traffic of its own, 
moved the http traffic to a locally connected system ( proxy , in his case a 
raspberry pi )

What version of the product are you using? On what operating system?

Latest version , revision .96, Raspberry pi 2 with wheezy

Please describe the problem as detailed as it's possible.

Please help !!

Original issue reported on code.google.com by [email protected] on 16 Jul 2015 at 11:13