>I am not sure that I already understood what you mean exactly.. could you please give me simple example ..please .. thanks
>
>Winanjaya
Crikey - you reading the docs ??
*---
Blocking banners and porn sites:

acl allow_url url_regex "/etc/squid/acl/allow_url"
acl deny_url url_regex "/etc/squid/acl/deny_url"
.....
http_access allow allow_url
http_access deny deny_url

The file deny_url contains regular expressions that define denied sites, for example:

^http://.*porno.*
^http://.*xxx.*
^http://.*\.linkexchange\.com/cgi-bin
*---
from http://www.linuxdevcenter.com/pub/a/linux/2003/11/20/internet_gateway.html
*---
so if i were you - i would find out [from reading your proxy logs] where yahoo messenger is sending from, by IP address, resolved DNS Host Name, and the port numbers, and then start making entries in file 'deny_url'


hth - mondo regards [Bill]