[root@lan ~]# yum -y install squid 
 Loading "installonlyn" plugin Loading "fastestmirror" plugin Setting up Install
 Process Setting up repositories base 100% 
|=========================| 1.1 kB    00:00  updates 100% 

|=========================| 951 B    00:00  addons 100% 

|=========================| 951 B    00:00  extras 100%

|=========================| 1.1 kB    00:00  Loading mirror speeds 

from cached hostfile Reading repository metadata in from local files Parsing

 package install arguments Resolving Dependencies --> Populating 

transaction set with selected packages. Please wait. ---> Downloading 
header for squid to pack into transaction set. squid-2.6.STABLE6-4.el5.i  
100% |========================|  139 kB    00:00 ---> Package 
squid.i386 7:2.6.STABLE6-4.el5 set to be updated --> Running transaction 

check   Dependencies Resolved   

=========================================================== 
Package Arch  Version  Repository  Size  
=========================================================== 
Installing:   squid i386  7:2.6.STABLE6-4.el5     updates  1.2 M    Transaction 
Summary 
=========================================================== 
Install 1 Package(s)  Update 0 Package(s)  Remove 0 Package(s)     Total 
download size: 1.2 M Downloading Packages: (1/1): squid-2.6.STABLE6- 
100% |====================| 1.2 M 00:00  Running Transaction Test 
Finished Transaction Test Transaction Test Succeeded Running Transaction   
Installing:   squid#################################### [1/1]     

Installed: squid.i386 7:2.6.STABLE6-4.el5 Complete!  

[root@lan ~]# vi /etc/squid/squid.conf

http_port 8080     // Thay đôi port cho proxy

acl CONNECT method CONNECT  acl lan src 192.168.0.0/255.255.255.0   // Thêm (Chỉ cho phép LAN) 

http_access allow localhost  http_access allow lan  // Thêm (Chỉ cho phép LAN)

http_access deny all   visible_hostname lan.quantrinet.com 

// Thêm dòng     # forwarded_for on  forwarded_for off       header_access Referer deny all  

// Thêm   header_access X-Forwarded-For deny all header_access Via deny all header_access Cache-Control deny all     

[root@lan ~]# /etc/rc.d/init.d/squid start  

init_cache_dir /var/spool/squid... Starting squid: [  OK  ] 

[root@lan ~]# chkconfig squid on