[squid-users] Squid httpd_accel to Exchange 2000 WebMail

Greetings all, I hope someone can assist me with this issue.

First off, this is what we are trying to accomplish. We have an Exchange
2000 Machine behind a firewall and a Squid/Sendmail box running on RedHat
7.1 in the DMZ area. The firewall transparently redirects ports 25 and 80 to
the Exchange Server. Sendmail is currently accepting mail for this domain
and redirecting it through the firewall to the Exch box. The Squid service
is acting as a proxy cache for all users on the inside going to the
Internet. The third request was for the machine to also do a "reverse proxy"
so that when someone hits port 80 on the Squid server it redirects the
connection to the FW/Exch port 80 so they can get to the WebMail interface.

All of this appears to be working with one major hiccup. After I get past
the Exch.2000's Basic Authentication password, the first reply is a
"Document Moved" http response. The sequence is as follows:
1. Browser connects to Squid and requests http://squid.ip.com/Exchange
2. Squid uses httpd_accel and redirects request to
http://firewall.ip.com/Exchange
3. Firewall transparently redirects this request to the Exchange box.
4. Exchange replies "Document Moved to http://firewall.ip.com/Exchange"5.
HTTP response gets passed all the way back to client browser.
6. Browser attempts to open http://firewall.ip.com/Exchange directly and is
denied because all requests must come through the Squid machine.

If I change squid.conf to forward based on IP or HostName the "Document
Moved" reply matches so it seems that they are automatically generating the
response based on the HTTP hearders of the initial request. I have tried
everything I can think of for a way to get around this but with no luck so
far. I ended up having to do packet capture and analysis with tcpdump to
even figure out this much of what is happening. Any suggestions???

I thank you all in advance for your help.

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