I am trying to setup a transparent proxy on a redhat 9 based system. I am able to follow all the steps in this tutorial -- http://www.faqs.org/docs/Linux-mini/...rentProxy.html -- except for the kernal configuration section. Do I have to make any adjustments to the Redhat 9 kernal 2.4.20-8 (installation default). If so, what commands need to be entered before or after I enter ``echo '1' > /proc/sys/net/ipv4/ip_forward''

Thanks,

Ben

I don't think that you need to recompile the kernel, just enable the routing features via /proc or some other means.

The most painless way I've found of setting up a NAT and firewall system is the 'shorewall' package. Webmin includes a Web-based configuration page for Shorewall.

The (rather good) Shorewall docs cover transparent proxying with Squid, and are worth a look even if you decide not to use the software.

http://www.shorewall.net/

They also explain the major drawback of transparent proxying - no SSL for the clients. I now use standard proxying for this reason.

check out this link in combination of the two it should work fine.
you dont need to recompile your kernel a stock redhat kernel has all that you need.
From this point you need to configure the squid.conf file.
read the page that you posted and this one too.
http://squid.visolve.com/squid/sqguide.htm

the following command should setup the transparency
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128