[SQU] why ip forwarding?

Hi all!

I'm new to this list and wanted to ask a few questions. I'm running a
proxy (squid of course), that came with redhat 6.2. It is basically
connected to 2 networks (say with ip 165.220.40.1 and 208.165.80.1). My
workstations are on the 165.220.40.0/24 network. I want Squid to use
the 165.220.40.1 interface to receive requests and use 208.165.88.1 to
connect to websites (the 208.165.88.0 link is faster). Yes, I already
use http_port 165.220.40.1:3128 and also tcp_outgoing_address
208.165.88.1.

My questions:

1. why is there a need for me to enable ip forwarding?

2. if i *don't* need to enable ip forwarding, then how come if i disable
it, my workstations keep saying "Host contacted. Waiting for reply..."
and then times out?

3. is it ok for me to use 1 physical interface for both ip's, i.e. just
use ip aliasing? will it degrade performance? (i have about 150
simultaneous connections)

4. how do i keep squid from displaying it's version number whenever it
generates an error page? (aside from creating error pages of my own)

Any help/comments/suggestions is appreciated.

Thanks in advance.

M. Yu

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