Squid issues using Satellite system

I don't know if this is more a question on routing or on Squid but I'm at a
loss for a solution, so I hope someone out there can help me.

I'm using Squid 2.2 STABLE4 on a RH 6.1 box. We are trying to deploy an
ISP-type system using an internet connection over satellite. The limitation
with accessing the Internet over satellite is that it is uni-directional
(downstream) from the satellite so therefore, HTTP requests have to be sent
back up via a conventional dial-up modem.

Here's the situation:

A client dials out through their local ISP in order to access the Squid
proxy. (The proxy, of course, has a static IP) The Squid box needs a
default gateway in order to access the internet (let's say via a T1 line) to
retrieve the data that was requested by the client. Now, in order to
forward this data to the "satellite side", the Squid proxy has to be routed
to a special gateway that can send this data over to the "satellite side" &
not back through the conventional internet path, otherwise it would just be
relayed back to the client via the modem (which would be much slower).

So here's my question. Is there anything I can put in the squid.conf file
to direct the internet data it has retrieved to a particular gateway/server?
I know you can direct it to another proxy but what about just another
gateway? I thought I could do it via the routing table but how would you be
able to route all traffic to a particular server and also have a default
gateway to access the internet to retrieve data from HTTP requests? By
having a default gateway to access the internet, all traffic flows out
through this gateway & not to the gateway I want it to. At least this is
how I understand it. I hope someone with more routing expertise can help me
understand this.

Please Help!! Thank you in advance.

Sincerely,
Received on Thu Jun 15 2000 - 17:00:13 MDT