aaaaaaaaaaaaaaaaaaa, voce esta usando o squid!
vou dar uma dica que vai facilitar sua vida (mas num conta pra ninguem...)
baixa o
webmin ele tem um configurador squid bem bacana para iniciantes.
dicas sobre ACL
http://www.dicas-l.com.br/dicas-l/20070116.phpesse aqui é um script de iptables que eu fiz uma vez, nele eu redireciono tudo que ta entrando na porta do squid para a porta 80, portanto usando proxy transparente. No qual nao é necessario configurar os clientes.
echo "##########################"
echo "# INICIANDO FIREWALL #"
echo "##########################"
modprobe iptable_nat
modprobe ip_nat_ftp
modprobe ip_conntrack_ftp
modprobe ip_conntrack
iptables -F
iptables -F INPUT
iptables -F OUTPUT
iptables -F POSTROUTING -t nat
iptables -F PREROUTING -t nat
iptables -P FORWARD ACCEPT
WAN="eth0"
iptables -t nat -A PREROUTING -s 192.168.2.0/24 -p tcp --dport 80 -j REDIRECT --to-port 3128
iptables -t nat -A PREROUTING -s 192.168.2.0/24 -p tcp --dport 110 -j REDIRECT --to-port 8110
iptables -A POSTROUTING -t nat -s 192.168.2.0/24 -o $WAN -j MASQUERADE
iptables -t nat -A PREROUTING -p tcp --dport 81 -i eth0 -j DNAT --to 192.168.2.1:80
echo 1 > /proc/sys/net/ipv4/ip_forward
IPREDE=192.168.2.0/24
DNS1=200.165.132.148
DNS2=200.149.55.142
###########################33
squid.confhttp_port 3128
visible_hostname Poseidon
# Configuração do cache
cache_mem 42 MB
maximum_object_size_in_memory 64 KB
maximum_object_size 300 MB
minimum_object_size 0 KB
cache_swap_low 90
cache_swap_high 95
cache_dir ufs /var/spool/squid 2048 16 256
# Localização do log de acessos do Squid
cache_access_log /var/log/squid/access.log
# Erros
error_directory /usr/share/squid/errors/Portuguese
refresh_pattern ^ftp: 15 20% 2280
refresh_pattern ^gopher: 15 0% 2280
refresh_pattern . 15 20% 2280
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl SSL_ports port 443 563 10000 20000
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 563 # https, snews
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl Safe_ports port 901 # SWAT
acl Safe_ports port 995 143 25 110 # Email
acl purge method PURGE
acl CONNECT method CONNECT
http_access allow manager localhost
http_access deny manager
http_access allow purge localhost
http_access deny purge
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
# Filtros por palavras e por dominios
acl proibidos dstdom_regex "/etc/squid/secure/block"
http_access deny proibidos
# Libera para a rede local
acl redelocal src 192.168.2.0/24
http_access allow localhost
http_access allow redelocal
# Bloqueia acessos externos
http_access deny all
######################
por fim crie o arquivo texto com a lista de sites "/etc/squid/secure/block" abra com um editor e coloque um site por linha.
Ex:
www.orkut.comwww.playboy.com.br##############################
qualquer duvida estamos ai.