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We have RHEL 5.0 squid proxy in our office.
Our LAN is 172.20.12.0 /24 n/w. Proxy ip is 172.20.12.4 /24 .
I want to share Internet through proxy.
Suppose I have flushed the iptables, can you tell me what is the procedure from starting to configure iptables.
Keeping in mind that only 172.20.12.4/24 traffic is allowed and all other (except 172.20.12.8 and 172.20.12.9) should be blocked from my LAN. And all users browsers should have proxy address to get Internet failing to give proxy should not get Internet.