proxy chaining

could the proxy requests been chained ?

for example ,my ISP givme a real IP (i assigned it the external interface of
my ISA 2004) and give me a proxy URL.

all my clients uses the ISA (internal interface)as their default gateway and
in their internet explorer they use the ISP URL as their proxy ..

could i make the clients uses the ISA2004 as their proxy and then the ISA
will send the requests again to the ISP proxy on behalf of clients?

please help in this

"Ammar" <(E-Mail Removed)> wrote in message
news:F169D0A7-72E5-4A92-B7C3-(E-Mail Removed)...
> all my clients uses the ISA (internal interface)as their default gateway
and
> in their internet explorer they use the ISP URL as their proxy ..

That is not chaining. That is nothing more than runining the clients as
SecureNAT Client which then send a request out via the SecureNAT Service to
the ISP's proxy and using the ISP Web Proxy Service to get to the
destination.

> could i make the clients uses the ISA2004 as their proxy and then the ISA
> will send the requests again to the ISP proxy on behalf of clients?

Yes. You just configure (in ISA) the ISP's Proxy to be an upstream proxy in
a proxy chain.

The next question is "Why?" All you are doing is creating additonal uneeded
complexity that is just asking for problems and failures that will be next
to impossible to troubleshoot since you do not have the ability to manage
nor troublshoot the ISP's proxy server in the same way you would if you own
both Proxys in the chain.

When there are problems, the ISP will always blame your proxy,...you will
always blame theirs,...and nobody goes anywhere.

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com