To Install and Configure Squid on Oracle Linux 8.5

Introduction:

Squid is an open-source web proxy cache server with features. It is used to block websites and file formats. It is a caching proxy server widely used on Linux and Unix. As a result, requested Internet objects, such as data on a Web server or an FTP server, are stored on a machine closer to the requesting workstation than the server.

Installation Steps:

Step 1: Check the oracle Linux version by using the below command

[root@linuxhelp linuxhelp]# cat /etc/os-release 
NAME="Oracle Linux Server"
VERSION="8.5"
ID="ol"
ID_LIKE="fedora"
VARIANT="Server"

Step 2: Install squid by using the below command

[root@linuxhelp linuxhelp]# yum -y install squid
Total download size: 3.7 M
Installed size: 12 M
Downloading Packages:
(1/3): libecap-1.0.1-2.module+el8.3.0+7819+eb7d4ef6.x86_ 153 kB/s |  29 kB     00:00    
(2/3): perl-Digest-SHA-6.02-1.el8.x86_64.rpm             342 kB/s |  66 kB     00:00    
(3/3): squid-4.15-3.module+el8.6.0+20529+9782b8ab.x86_64  13 MB/s | 3.6 MB     00:00    
-----------------------------------------------------------------------------------------
Installed:
  libecap-1.0.1-2.module+el8.3.0+7819+eb7d4ef6.x86_64                                    
 perl-Digest-SHA-1:6.02-1.el8.x86_64                                                    
  squid-7:4.15-3.module+el8.6.0+20529+9782b8ab.x86_64                                    

Complete!

Step 3: Enable the Squid by using the below command

[root@linuxhelp linuxhelp]# systemctl enable squid
Created symlink /etc/systemd/system/multi-user.target.wants/squid.service → /usr/lib/systemd/system/squid.service.

Step 4: Start the Squid by using the below command

 [root@linuxhelp linuxhelp]# systemctl start squid

Step 5: Check the Status by using the below command

 [root@linuxhelp linuxhelp]# systemctl status squid
● squid.service - Squid caching proxy
   Loaded: loaded (/usr/lib/systemd/system/squid.service; enabled; vendor preset: disabl>
   Active: active (running) since Sun 2022-05-29 04:52:02 IST; 7s ago
     Docs: man:squid(8)

Step 6: Create a file and insert the domain names in squid directory by using the below command

[root@linuxhelp linuxhelp]# vim /etc/squid/test.txt
.facebook.com
.youtube.com
.linuxhelp.com

Step 7: Open the configuration file by using the below command

[root@linuxhelp /]# vim /etc/squid/squid.conf


uncomment the localnet and localhost in squid configuration
#http_access allow localnet
#http_access allow localhost
 



 Now change from deny to allow HTTP access

And finally deny all other access to this proxy


http_access allow all

Create rule to allow only 3 sites and to block other sites in Squid configuration by using the below command

[root@linuxhelp linuxhelp]# vim /etc/squid/squid.conf
acl list src 192.168.6.127/23
acl domain dstdomain "/etc/squid/test.txt"
http_access allow list domain
http_access deny list

Step 8: Disable, Stop and Check the Status of Firewall by using the below command

[root@linuxhelp linuxhelp]# systemctl disable firewalld
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@linuxhelp linuxhelp]# systemctl stop firewalld
 [root@linuxhelp linuxhelp]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: e>
   Active: inactive (dead)
     Docs: man:firewalld(1)

Step 9: Restart the squid by using the below command

[root@linuxhelp linuxhelp]# systemctl restart squid

Step 10: Open Windows machine and change proxy server as shown in the below image

Step 11: Open Web browser and search the domain inserted in etc/squid/test.txt as shown in the below image. Allowed domains

Blocked Domains

Step 12: Again Open the Configuration and create rule to allow all sites and block only 3 site by using the below command

[root@linuxhelp linuxhelp]# vim /etc/squid/squid.conf
acl list src 192.168.6.127/23
acl domain dstdomain "/etc/squid/test.txt"
http_access deny list domain
http_access allow list

Step 13: Restart the squid

[root@linuxhelp linuxhelp]# systemctl restart squid

Step 14 ::Open Web browser and search the domain inserted in etc/squid/test.txt Blocked Sites

Allowed sites

We have reached the end of this article. In this guide, we have walked you through the steps required to Installation and Configuration of Squid on Oracle Linux 8.5. Your feedback is much welcome.