LinuxQuestions.org - How to redirect http port 80 from slackware gateway to redhat proxy

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How to redirect http port 80 from slackware gateway to redhat proxy

I have a small network (around 25 computers), that is connected to Internet through a gateway that is implemented on a Linux Slackware 10.
I wannt to use a proxy for limiting Internet access. So I bought a new computer on wich I wannt to install a Linux RedHat 9.0, and to use on it squid.
Is this possible? And how?

yes, you can do it... here's one way:

Code:

iptables -t nat -A PREROUTING -i $LAN_IFACE -p TCP --dport 3128 \

-j DNAT --to-destination $REDHAT_BOX_IP

wait, i just re-read the thread's title...

are you asking about a transparent setup??

if so, then it would probably look *somewhat* like this:

Code:

iptables -P FORWARD DROP



iptables -t nat -A PREROUTING -i $LAN_IFACE -s ! $REDHAT_BOX_IP \

-p TCP --dport 80 -j DNAT --to-destination $REDHAT_BOX_IP:3128



iptables -t nat -A POSTROUTING -o $LAN_IFACE -d $REDHAT_BOX_IP \

-j SNAT --to-source $SLACKWARE_BOX_IP



iptables -A FORWARD -p TCP -i $LAN_IFACE -o $LAN_IFACE -s $LAN_NET \

--dport 3128 -d $REDHAT_BOX_IP -j ACCEPT



echo "1" > /proc/sys/net/ipv4/ip_forward

with lines like this in your squid.conf:

Code:

httpd_accel_host virtual

httpd_accel_port 80

httpd_accel_with_proxy on

httpd_accel_uses_host_header on