apt-get install squid
vim /etc/squid3/squid.conf
visible_hostname ksproxy
http_access allow all
http_port 3128 transparent
/etc/init.d/squid3 restart
echo "1" >/proc/sys/net/ipv4/ip_forward
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-ports 3128
这个放到rc.local里面即可。
日志：
/var/log/squid3/