[squid-users] Blocking porn site

Hello
i had a problem when blocking "unhealthy site". i use this config below

acl localusers src 192.4.5.0/255.255.255.0
acl porn url_regex "/usr/local/squid/etc/porn"
http_access allow localusers !porn
http_access deny all

and also use this config

acl localusers src 192.4.5.0/255.255.255.0
acl porn url_regex "/usr/local/squid/etc/porn"
http_access allow localusers
http_access deny porn all

and also this config

acl localusers src 192.4.5.0/255.255.255.0
acl porn url_regex "/usr/local/squid/etc/porn"
http_access allow localusers
http_access deny porn
http_access deny all

I do testing and seems like user still can go to porno site. Seems like
my squid box didn't block the site mention. How do i solve this problem?

--
Yuzz
System Engineer
Tel : +606-3345666
Fax : +606-3372233