I work for a small ISP and we went to setup a HTTP cacheing server.  I was
told we needed to configure our router to forward port 80 requests to so and
so ip address to let the server handle web traffic.  We are looking at using
something similar to Squid running on Windows 2000.  We do not have a layer
4 switch.  I have no idea where to start looking for documentation on
enabling this, anyone have any suggetions?

Phil Hart
www.vance.net

In article <vgtl9nh17pm226@corp.supernews.com>,
Radial Monster <radial@vance.net> wrote:
:I work for a small ISP and we went to setup a HTTP cacheing server.  I was
:told we needed to configure our router to forward port 80 requests to so and
:so ip address to let the server handle web traffic.  We are looking at using
:something similar to Squid running on Windows 2000.  We do not have a layer
:4 switch.  I have no idea where to start looking for documentation on
:enabling this, anyone have any suggetions?

It sounds to me as if you could use policy based routing (PBR).

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/qos_c/qcprt1/qcdpbr.htm

My thought is that you would use a route-map with an access-list
that matched all inside IP addresses *except* for the IP of
your proxy server, and forwarded those packets to your server
machine. [Hmmm, you just might need to use a loopback interface
as an intermediate hop, but I think it should work without one.]
-- 
   Perposterous!! Where would all the calculators go?!

"Walter Roberson" <roberson@ibd.nrc-cnrc.gc.ca> wrote in message
news:bemlce$a4r$1@canopus.cc.umanitoba.ca...
> In article <vgtl9nh17pm226@corp.supernews.com>,
> Radial Monster <radial@vance.net> wrote:
> :I work for a small ISP and we went to setup a HTTP cacheing server.  I
was
> :told we needed to configure our router to forward port 80 requests to so
and
> :so ip address to let the server handle web traffic.  We are looking at
using
> :something similar to Squid running on Windows 2000.  We do not have a
layer
> :4 switch.  I have no idea where to start looking for documentation on
> :enabling this, anyone have any suggetions?
>
> It sounds to me as if you could use policy based routing (PBR).
>
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/qos_c/qcprt1/qcdpbr.htm
>
> My thought is that you would use a route-map with an access-list
> that matched all inside IP addresses *except* for the IP of
> your proxy server, and forwarded those packets to your server
> machine. [Hmmm, you just might need to use a loopback interface
> as an intermediate hop, but I think it should work without one.]
> -- 
>    Perposterous!! Where would all the calculators go?!


You might want to take a look at Web Cache Communication Protocol (WCCP) in
the cisco IOS.

In short: It redirects HTTP traffic to your squid-http-proxy, making the
proxy transparent to the users.

We used to do this, only our web-cache ran on Linux (also squid). I remember
that we had to do something to Linux to make it understand the WCCP
protocol, but that was some time ago (and not hard to do).
That might not be necessary any more.

These links might take you in the right direction.
http://www.cisco.com/warp/public/732/Tech/switching/wccp/release_12.shtml

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/fun_c/fcprt3/fcd305.htm

Hope it helps...

Alex