How To Install squidGuard on CentOS 8
Introduction
In this tutorial we learn how to install squidGuard on CentOS 8.
What is squidGuard
squidGuard can be used to - limit the web access for some users to a list of accepted/well known web servers and/or URLs only. - block access to some listed or blacklisted web servers and/or URLs for some users. - block access to URLs matching a list of regular expressions or words for some users. - enforce the use of domainnames/prohibit the use of IP address in URLs. - redirect blocked URLs to an “intelligent” CGI based info page. - redirect unregistered user to a registration form. - redirect popular downloads like Netscape, MSIE etc. to local copies. - redirect banners to an empty GIF. - have different access rules based on time of day, day of the week, date etc. - have different rules for different user groups. - and much more.. Neither squidGuard nor Squid can be used to - filter/censor/edit text inside documents - filter/censor/edit embeded scripting languages like JavaScript or VBscript inside HTML
We can use yum or dnf to install squidGuard on CentOS 8. In this tutorial we discuss both methods but you only need to choose one of method to install squidGuard.
Install squidGuard on CentOS 8 Using dnf
Update yum database with dnf using the following command.
sudo dnf makecache --refresh
The output should look something like this:
CentOS Linux 8 - AppStream 43 kB/s | 4.3 kB 00:00
CentOS Linux 8 - BaseOS 65 kB/s | 3.9 kB 00:00
CentOS Linux 8 - ContinuousRelease 43 kB/s | 3.0 kB 00:00
CentOS Linux 8 - Extras 23 kB/s | 1.5 kB 00:00
CentOS Linux 8 - FastTrack 40 kB/s | 3.0 kB 00:00
CentOS Linux 8 - HighAvailability 36 kB/s | 3.9 kB 00:00
CentOS Linux 8 - Plus 24 kB/s | 1.5 kB 00:00
CentOS Linux 8 - PowerTools 50 kB/s | 4.3 kB 00:00
Extra Packages for Enterprise Linux Modular 8 - x86_64 13 kB/s | 9.2 kB 00:00
Extra Packages for Enterprise Linux 8 - x86_64 24 kB/s | 8.5 kB 00:00
Metadata cache created.
After updating yum database, We can install squidGuard using dnf by running the following command:
sudo dnf -y install squidGuard
Install squidGuard on CentOS 8 Using yum
Update yum database with yum using the following command.
sudo yum makecache --refresh
The output should look something like this:
CentOS Linux 8 - AppStream 43 kB/s | 4.3 kB 00:00
CentOS Linux 8 - BaseOS 65 kB/s | 3.9 kB 00:00
CentOS Linux 8 - ContinuousRelease 43 kB/s | 3.0 kB 00:00
CentOS Linux 8 - Extras 23 kB/s | 1.5 kB 00:00
CentOS Linux 8 - FastTrack 40 kB/s | 3.0 kB 00:00
CentOS Linux 8 - HighAvailability 36 kB/s | 3.9 kB 00:00
CentOS Linux 8 - Plus 24 kB/s | 1.5 kB 00:00
CentOS Linux 8 - PowerTools 50 kB/s | 4.3 kB 00:00
Extra Packages for Enterprise Linux Modular 8 - x86_64 13 kB/s | 9.2 kB 00:00
Extra Packages for Enterprise Linux 8 - x86_64 24 kB/s | 8.5 kB 00:00
Metadata cache created.
After updating yum database, We can install squidGuard using yum by running the following command:
sudo yum -y install squidGuard
How To Uninstall squidGuard on CentOS 8
To uninstall only the squidGuard package we can use the following command:
sudo dnf remove squidGuard
squidGuard Package Contents on CentOS 8
/etc/cron.daily/squidGuard
/etc/logrotate.d/squidGuard
/etc/squid/squidGuard.conf
/usr/bin/hostbyname
/usr/bin/sgclean
/usr/bin/squidGuard
/usr/bin/squidGuard-helper
/usr/bin/transparent-proxying-helper
/usr/lib/.build-id
/usr/lib/.build-id/fc
/usr/lib/.build-id/fc/d3ce525bfd41835c2036767df1475b287d8549
/usr/lib/systemd/system/squidGuard.service
/usr/lib/systemd/system/transparent-proxying.service
/usr/share/doc/squidGuard
/usr/share/doc/squidGuard/COPYING
/usr/share/doc/squidGuard/GPL
/usr/share/doc/squidGuard/LDAPFlow.txt
/usr/share/doc/squidGuard/authentication.html
/usr/share/doc/squidGuard/authentication.txt
/usr/share/doc/squidGuard/blacklists.tar.gz
/usr/share/doc/squidGuard/configuration.html
/usr/share/doc/squidGuard/configuration.txt
/usr/share/doc/squidGuard/configure.html
/usr/share/doc/squidGuard/configure.txt
/usr/share/doc/squidGuard/expressionlist.html
/usr/share/doc/squidGuard/expressionlist.txt
/usr/share/doc/squidGuard/extended.html
/usr/share/doc/squidGuard/extended.txt
/usr/share/doc/squidGuard/faq.html
/usr/share/doc/squidGuard/faq.txt
/usr/share/doc/squidGuard/features.html
/usr/share/doc/squidGuard/features.txt
/usr/share/doc/squidGuard/index.html
/usr/share/doc/squidGuard/install.html
/usr/share/doc/squidGuard/install.txt
/usr/share/doc/squidGuard/installation.html
/usr/share/doc/squidGuard/installation.txt
/usr/share/doc/squidGuard/ldap-ad-tips.html
/usr/share/doc/squidGuard/ldap-ad-tips.txt
/usr/share/doc/squidGuard/ldap.html
/usr/share/doc/squidGuard/ldap.txt
/usr/share/doc/squidGuard/runtimeops.html
/usr/share/doc/squidGuard/runtimeops.txt
/usr/share/doc/squidGuard/sample.conf
/usr/share/doc/squidGuard/squidGuard-simple-de.cgi
/usr/share/doc/squidGuard/squidGuard-simple.cgi
/usr/share/doc/squidGuard/squidGuard.cgi
/usr/share/doc/squidGuard/squidGuard.conf.k12ltsp.template
/usr/share/doc/squidGuard/squidGuard.gif
/usr/share/doc/squidGuard/troubleshoot.html
/usr/share/doc/squidGuard/troubleshoot.txt
/var/log/squid/squidGuard.log
/var/log/squidGuard
/var/squidGuard
/var/squidGuard/blacklists.tar.gz
/var/www/cgi-bin/babel.de
/var/www/cgi-bin/babel.en
/var/www/cgi-bin/babel.es
/var/www/cgi-bin/babel.fr
/var/www/cgi-bin/babel.nl
/var/www/cgi-bin/babel.no
/var/www/cgi-bin/babel.ru
/var/www/cgi-bin/squidGuard-simple-de.cgi
/var/www/cgi-bin/squidGuard-simple.cgi
/var/www/cgi-bin/squidGuard.cgi
References
Summary
In this tutorial we learn how to install squidGuard on CentOS 8 using yum and dnf.