Estou fazendo um nat no meu firewall para compartilhar a conexao sem utilizao o squid.
iptables -A FORWARD -s 192.168.0.2 -p tcp --dport 80 -j ACCEPT
iptables -A FORWARD -s 192.168.0.3 -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -s 192.0.0.0/8 -p tcp --dport 80 -j REJECT
iptables -A OUTPUT -s 192.0.0.0/8 -p tcp --dport 80 -j REJECT
iptables -A FORWARD -s 192.168.0.2 -p udp --dport 80 -j ACCEPT
iptables -A FORWARD -s 192.168.0.3 -p udp --dport 80 -j ACCEPT
iptables -A INPUT -s 192.0.0.0/8 -p udp --dport 80 -j REJECT
iptables -A OUTPUT -s 192.0.0.0/8 -p udp --dport 80 -j REJECT
modprobe iptable_nat
iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward
:toim: O PROBLEMA É QUA A MAQUINA 192.168.0.30 ESTA ACESSANDO A NET MESMO NAO TANDO LIBERADO NO FIREWALL