```
cd /etc/squid3/ 
mv squid.conf squid.conf.default
vim squid.conf
echo > /etc/squid3/denyip
/etc/init.d/squid3 stop 
/usr/sbin/squid3 -zX 
/etc/init.d/squid3 start 
/etc/init.d/squid3 restart 
```

<p>&nbsp;</p>