On Thu, Jan 26, 2006 at 01:38:54PM -0800, Ehrhart, Jay wrote: > I don't think I made what I want to accomplish clear. > > I am at a county office of Education. By law all web traffic to the > real Internet must be filtered. I have a Red Hat Linux server running > N2H2 web filtering. It is a transparent proxy. All traffic goes > through the proxy filter and there is no way around it. > > I have an internal web server that is only for the schools and is not > publicly accessible. The proxy server does its job and sends the > traffic out where it dies on the outside of my publicly facing firewall. > I want to bypass the proxy with squid or iptables so that the private > sites can reach the private web site.
I realize this. The message you're responding to was something of a tangent. So, it is a transparent proxy, and editing your Connection Settings won't work. Any changes made must be done at the proxy server, or at a routing level. First off: as things currently stand, does traffic directed at the private web server actually get there (though redirected from the proxy server)? If not, then you need to make sure that the proxy knows how to direct traffic there. Now, if things are getting to the private web server, but always show the IP address from the proxy server, there's a couple options. The easiest, if you are able to make the appropriate adjustments at the web server, is to comprehend and correctly interpret the HTTP X-Forwarded-From (non-standard) header that your proxy should be emitting. Another option is to configure the proxy server to directly forward IP packets to the internal web server, virtually unchanged (that is, with the original source IP address intact). If you're not using Linux, I can't help you there (it may not be possible). But your best option would be to ensure that the routing tables of the machines on your network don't direct intranetwork traffic through the proxy. If you're using DHCP, then it's the DHCP server you need to configure for this. HTH, Micah _______________________________________________ vox-tech mailing list [email protected] http://lists.lugod.org/mailman/listinfo/vox-tech
