Squid configuration

Squid on Ubuntu 14

Installation :- 

At a terminal prompt, enter the following command to install the  Squid server:

first of all check Ubuntu package is update  

  $ sudo apt-get update

$ sudo apt-get install squid3

in my Ubuntu squid already install thats why they can show that message but in fresh installation it can show installation message.

Squid Start at Boot?

$ sudo initctl show-config squid3

Configuration

Squid is configured by editing the directives contained within the /etc/squid3/squid.conf configuration file.Make this copy and protect it from writing using the following commands: 

$ sudo cp /etc/squid3/squid.conf /etc/squid3/squid.conf.original
$ sudo chmod a-w /etc/squid3/squid.conf.original 

 Open the squid3 configuration file bye using any text editor such as vi or gedit 

$ sudo vi /etc/squid3/squid.conf 

 1. Default Squid server listen port is

 http_port 3128 

2. Change visible hostname 

Change the visible_hostname directive in order to give the Squid server a specific hostname. This hostname does not necessarily need to be the computer's hostname. In this example it is set to

visible_hostname proxy15 

 3.  Local LAN Setting 

 Using Squid's access control, you may configure Squid to be available only users with certain  IP addresses. For example, we will illustrate access by users of the 192.168.0.0/24 subnetwork only:

Add the following to the bottom of the ACL section of your /etc/squid3/squid.conf file: 

 

acl mits_network src 192.168.0.0/24

Then, add the following to the top of the http_access section of your /etc/squid3/squid.conf file:

http_access allow mits_network

 4. website control (if required)

This is a beauty of squid we can block some website in our LAN through some setting on our squid.conf file such as 

make a file in /etc/squid3 directory 

$ sudo vi /etc/squid3/blocksites.acl

  

fill the site name such as  .facebook . youtube and  u wont to blok some other like .sex tag .porn u can also mentioned 

 $ sudo chmod 755 /etc/squid3/blocksites.acl

$ sudo gedit /etc/squid3/squid.conf

add this line :-  acl blk url_regex "/etc/squid3/blocksites.acl"

 

after that block that acl and allow your network  

http_access deny blk

http_access allow mits_network

 5. Internet Timing Control (if required )

Using the excellent access control features of Squid, you may configure use of Internet services proxied by Squid to be available only during normal business hours. For example, we'll illustrate access by employees of a business which is operating between 9:00AM and 5:00PM, Monday through Friday, and which uses the 192.168.0.0/24 subnetwork:

Add the following to the bottom of the ACL section of your /etc/squid3/squid.conf file:

acl mits_hours time M T W T F 9:00-17:00 

Then, add the following to the top of the http_access section of your
                   /etc/squid3/squid.conf file:

http_access allow mits_network mits_hours

After making changes to the /etc/squid3/squid.conf file, save the file and restart the squid server application to effect the changes using the following command entered at a terminal prompt: 

 Squid start

$ sudo service squid3 start 

 Enjoy !!!!!!!