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8.0

Using IPTABLES to redirect http traffic to a transparent proxy

Asked by manav08 in IP Tables/IP Chains, Bourne-Again Shell (bash)

We have a proxy server which is hosted at 192.168.102.3, running on port 8080.
This proxy is running Squid.
We have another linux server which provides DHCP, DNS, etc. for the 192.168.102.x network. What I want to do is, use IPTABLES on this server to direct all http traffic to our proxy.
Here are the 2 commands I am using.

iptables -t nat -I PREROUTING -i eth0 -p tcp --dport 80 -s ! 192.168.102.3 -j DNAT --to-destination 192.168.102.3:8080
iptables -t nat -I PREROUTING -i eth0 -p tcp --dport 80 -d 192.168.102.1 -RETURN

This does work as it redirects traffic to the proxy but the problem is, that squid doesn;t pick up the URL and comes up with an error.
Example:
http://www.google.com/ - is detected as - /
http://www.google.com/search?hl=en&rls=com.microsoft%3A*&q=test - is detected as - /search?hl=en&rls=com.microsoft%3A*&q=test

Basically it strikes of the main URL completely and hence an error comes up saying INVALID URL. Anyone know how to fix it??

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20091021-EE-VQP-81 - Hierarchy / EE_QW_3_20080625

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Using IPTABLES to redirect http traffic to a transparent proxy

Asked by manav08 in IP Tables/IP Chains, Bourne-Again Shell (bash)

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