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Squid - Proxy Server installation on server


Installation

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

 

sudo apt-get install squid3

 

Configuration

Squid is configured by editing the directives contained within the /etc/squid3/squid.conf configuration file. The following examples illustrate some of the directives which may be modified to affect the behavior of the Squid server. For more in-depth configuration of Squid, see the References section.

Prior to editing the configuration file, you should make a copy of the original file and protect it from writing so you will have the original settings as a reference, and to re-use as necessary. 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

 

 

  • To set your Squid server to listen on TCP port 8888 instead of the default TCP port 3128, change the http_port directive as such:

    http_port 8888
    
  • 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¬†weezie

    visible_hostname weezie
    
  • Using Squid's access control, you may configure use of Internet services proxied by Squid to be available only users with certain Internet Protocol (IP) addresses. For example, we will illustrate access by users of the 192.168.42.0/24 subnetwork only:

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

    acl fortytwo_network src 192.168.42.0/24
    

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

    http_access allow fortytwo_network
    
  • 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 10.1.42.0/24 subnetwork:

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

    acl biz_network src 10.1.42.0/24
    acl biz_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 biz_network biz_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:

 

sudo service squid3 restart

asked Jun 9, 2015 in LINUX by rajesh
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