Install Setup Squid HTTP Web Proxy CentOS 6 Server

Install and Setup Squid as HTTP web proxy, squid caching and forwarding to speeding up a web server by caching repeated requests on CentOS 6 Server.

Install Squid from CentOS repositories, make sure sure CentOS 6 Server system is up-to-date

#yum update
#yum install squid

Check it Squid has been installed successfully

#ls -la /etc/squid
drwxr-xr-x  2 root  root   4096 Sep  4 00:15 .
drwxr-xr-x 53 root  root   4096 Sep  4 00:36 ..
-rw-r--r--  1 root  squid   419 Aug  4 07:56 cachemgr.conf
-rw-r--r--  1 root  root    419 Aug  4 07:56 cachemgr.conf.default
-rw-r--r--  1 root  root   1547 Aug  4 07:56 errorpage.css
-rw-r--r--  1 root  root   1547 Aug  4 07:56 errorpage.css.default
-rw-r--r--  1 root  root  11651 Aug  4 07:56 mime.conf
-rw-r--r--  1 root  root  11651 Aug  4 07:56 mime.conf.default
-rw-r--r--  1 root  root    421 Aug  4 07:56 msntauth.conf
-rw-r--r--  1 root  root    421 Aug  4 07:56 msntauth.conf.default
-rw-r-----  1 root  squid  3948 Sep  4 00:14 squid.conf
-rw-r--r--  1 root  root   2425 Aug  4 07:56 squid.conf.default

Configuring Squid as an HTTP web proxy.
Edit the Squid configuration file /etc/squid/squid.conf
This squid configuration set all IP address may connect or using this as HTTP web proxy

# vi /etc/squid/squid.conf

Add the following lines

http_access allow all

Run Squid http web proxy

#service squid start

Setup Squid for anonymous traffic and mask original local IP address.

Add the following lines to Squid configuration file.

#vi /etc/squid/squid.conf
forwarded_for off
request_header_access Allow allow all
request_header_access Authorization allow all
request_header_access WWW-Authenticate allow all
request_header_access Proxy-Authorization allow all
request_header_access Proxy-Authenticate allow all
request_header_access Cache-Control allow all
request_header_access Content-Encoding allow all
request_header_access Content-Length allow all
request_header_access Content-Type allow all
request_header_access Date allow all
request_header_access Expires allow all
request_header_access Host allow all
request_header_access If-Modified-Since allow all
request_header_access Last-Modified allow all
request_header_access Location allow all
request_header_access Pragma allow all
request_header_access Accept allow all
request_header_access Accept-Charset allow all
request_header_access Accept-Encoding allow all
request_header_access Accept-Language allow all
request_header_access Content-Language allow all
request_header_access Mime-Version allow all
request_header_access Retry-After allow all
request_header_access Title allow all
request_header_access Connection allow all
request_header_access Proxy-Connection allow all
request_header_access User-Agent allow all
request_header_access Cookie allow all
request_header_access All deny all

Save and exit then restart squid for the squid configuration applied changes

#service squid restart

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