ubuntu 14.04 Squid3 proxy server did't block websites listed in file
 

acl AuthenticatedUsers proxy_auth REQUIRED
acl localnet src 192.168.0.0/22 # RFC1918 possible internal network
acl special_client arp "/etc/squid3/spclients"
acl media rep_mime_type video/flv video/x-flv
acl media rep_mime_type -i ^video/
acl media rep_mime_type -i ^video\/
acl media rep_mime_type ^application/vnd.ms.wms-hdr.asfv1
acl media rep_mime_type ^application/x-fcs
acl media rep_mime_type ^application/x-mms-framed
acl media rep_mime_type ^video/x-ms-asf
acl media rep_mime_type ^audio/mpeg
acl media rep_mime_type ^audio/x-scpls
acl media rep_mime_type ^video/x-flv
acl media rep_mime_type ^video/mpeg4
acl media rep_mime_type ms-hdr
acl media rep_mime_type x-fcs
acl mediapr urlpath_regex \.flv(\?.*)?$
acl mediapr urlpath_regex -i \.(avi|mp4|mov|m4v|mkv|flv)(\?.*)?$
acl mediapr urlpath_regex -i \.(mpg|mpeg|avi|mov|flv|wmv|mkv|rmvb)(\?.*)?$
acl SSL_ports port 443 # regex matching on whole URL
acl Safe_ports port 80
acl Safe_ports port 21 # http
acl Safe_ports port 443 # ftp
acl Safe_ports port 70 # https
acl Safe_ports port 210 # gopher
acl Safe_ports port 1025-65535 # wais
acl Safe_ports port 280 # unregistered ports
acl Safe_ports port 488 # http-mgmt
acl Safe_ports port 591 # gss-http
acl Safe_ports port 777 # filemaker
acl CONNECT method CONNECT # multiling http
acl admin src 192.168.0.3
acl bansites url_regex "/etc/squid3/bansite.conf"
http_access allow AuthenticatedUsers
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost manager
http_access deny manager
http_access allow mediapr special_client
http_access deny mediapr
http_access allow admin
http_access deny bansites
http_access allow localnet
http_access allow localhost
http_access deny all