[squid-users] Squid Clustered configuration

Hi to everybody,
                    i have a little question on clustered squid
configuration.
I installed a precompiled squid version (squid-2.5.STABLE3-6.3E.9 on
RedHat ES3 up5)and i bind the listen port on a virtual ip (ie: eth:0:1)
using: http_port <ip on virtual nic>:<port> and now squid is listening
on in the defined ip.
On firewall logs i see that squid requests has the original ip source
(ie eth0) and not the virtual one (eth0:1).
For security reasons i would like force the ip source . Can be done on
squid or i need of a NAT rule on the firewall?

Many Thanks in Advance

-- 
Alessandro Favretto 
Sistemista servizi di rete
Fracarro S.p.a.
alessandro.favretto@fracarro.com
Tel +39 0423.7361
Fax +39 0423.736220