[squid-users] forwarded_for

Hi,
In one jerarquia of 3 levels of proxy-cache, we have configured so that
the first level shows ips of the clients (forwarded on) and works well,
and in proxis-cache of third-level of exit (forwarded off), but here is
where it does not work and shows the following thing:

X-Forwarded-For: x.x.x.x, x.x.x.x
X-Forwarded-For: x.x.x.x, x.x.x.x
X-Forwarded-For: x.x.x.x, x.x.x.x
X-Forwarded-For: x.x.x.x, x.x.x.x
X-Forwarded-For: x.x.x.x, x.x.x.x
X-Forwarded-For: x.x.x.x, x.x.x.x
where x.x.x.x is ips of our clients.

instead of:

X-Forwarded-For: unknown

The squid version is squid-2.5Stable4

Thanks in advanced.
Emilio