How to Setup Squid Proxy Server on Ubuntu 18.04 & 16.04

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Squid is the most popular Proxy server for Unix like operating systems. It also used for the web filtering. Squid also useful as caching proxy server for the HTTP, HTTPS, FTP protocols.

 

This article will help you to setup Squid Proxy Server on Ubuntu 18.10, 18.04 LTS, 16.04 LTS, and 14.04 LTS systems.

 

Step 1 – Install Package

Squid packages are available in default yum repositories. Execute below command on your server to install SQUID proxy server.

 

sudo apt update
sudo apt install squid

 

or

 

sudo apt install squid3

 

Step 2 – Configure Squid Port

The default port for the Squid proxy servers is 3128. You can change this as per the requirements. To setup Squid on different port, Edit squid configuration file and change http_port value with new port.

 

/etc/squid/squid.conf
http_port 3128

 

After making changing let’s restart Squid service to reload the configuration changes

 

sudo service squid restart

 

The next steps will help you to Setup Squid Proxy Server on Ubuntu systems. Use only those settings, which is required for your proxy server.

 

Step 3 – Allow All Traffic

Sometimes you are required to allow all traffic on your proxy server. In Squid server open Squid configuration file. Comment the http_access deny all line and add the http_access allow all entry this file.

 

/etc/squid/squid.conf
http_access allow all
#http_access deny all

 

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Step 4 – Block Specific Website with Squid

Let’s start with the additional configuration like blocking any website using squid proxy server. Add below rules to block specific website before any allow all rules. Below example will block yahoo.com and

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/etc/squid/squid.conf
acl blocksite1 dstdomain yahoo.com
acl blocksite2 dstdomain www.rediff.com
http_access deny blocksite1
http_access deny blocksite2

 

If you have a long list of domain names, Create a file /etc/squid/blockwebsites.lst and put domain names one per line and add below rule in the squid configuration file.

 

/etc/squid/squid.conf
acl blocksitelist dstdomain "/etc/squid/blockwebsites.lst"
http_access deny blocksitelist

[b]blockwebsites.lst[/b] file content example:

cat /etc/squid/blockwebsites.lst

yahoo.com
www.rediff.com

 

Step 5 – Block Specific Keyword with Squid

Add below rules to block specific website before any allow all rules. Below example will block all pages having keyword yahoo or Gmail.

 

/etc/squid/squid.conf
acl blockkeyword1 url_regex yahoo
acl blockkeyword2 url_regex gmail
http_access deny blockkeyword1
http_access deny blockkeyword2

If you have a long list of keywords, Create a file /etc/squid/blockkeywords.lst and put keywords one per line and add below rule in the squid configuration file.

 

/etc/squid/squid.conf
acl blockkeywordlist url_regex "/etc/squid/blockkeywords.lst"
http_access deny blockkeywordlist

blockkeywords.lst file content example:

cat /etc/squid/blockkeywords.lst

yahoo
gmail
facebook

 

Congratulation’s you have successfully install and configured Squid proxy server.

 

Credits to tecadmin.net

Edited April 7, 2019 by _.:=iTake=:._