How to set up Proxy server in CentOS / Red Hat ?

You are most welcome to this post.

Really thanks to you for your interest in this topics. :)

Friends, in our previous post we’ve discussed some thing about the configuration of proxy server. In this post we’ll enjoy:

How to set up Proxy server in CentOS / Red Hat ?

Now lets see the steps clearly:

At first we’ll clean all the data of “YUM”:

[root@localhost ~]# yum clean all

 

Then we clear our screen, that is our terminal screen:

[root@localhost ~]# clear

 

We’ve imported our proxy, you can find this proxy from your internet service provider:

[root@localhost ~]# http_proxy = http://172.16.200.1:3128

 

We are now updating the Yum database:

[root@localhost ~]# yum -y update

 

Install squid, which will work as proxy server:

[root@localhost ~]# yum -y install squid

 

Install iptables, which is also required for the configuration of proxy server:

[root@localhost ~]# yum -y install iptables-services

 

Now enable and restart the squid and iptables software:

[root@localhost ~]# systemctl enable squid

[root@localhost ~]# systemctl start squid

[root@localhost ~]# systemctl enable iptables

[root@localhost ~]# systemctl start iptables

 

Now you need to backup the squid configuration file:

[root@localhost ~]# cp /etc/squid/squid.conf    /etc/squid/squid.conf.org.back

[root@localhost ~]# nano /etc/squid/squid.conf

 

Uncomment line ##
cache_dir ufs /var/spool/squid 100 16 256 (100 MB, 16 Level)

Press “Ctrl+o” to save

Press “Ctrl+x” to exit

[root@localhost ~]# nano /etc/squid/squid.conf

at the end write,

( Here see, I’ve written two IP address. One is LAN IP address and the other is my domain (iict) IP address )

acl lan src 192.168.10.0/24
acl iict src 172.16.0.0/16
http_access allow lan
http_access allow iict

 

Press “Ctrl+o” to save

Press “Ctrl+x” to exit

 

 

[root@localhost ~]# systemctl restart squid

 

Again open the configuration file:

[root@localhost ~]#nano /etc/squid/squid.conf

Write:

visible_hostname iict.com

 

Now you need to configure firewall,

[root@localhost ~]# firewall-cmd –zone=public –add-port=3128/tcp –permanent

[root@localhost ~]# firewall-cmd –reload

 

You also need to disable the SELinux. follow the commands:

[root@localhost ~]# nano /etc/selinux/config

SELinux=enforcing  Make it to SELinux=disabled

 

Now reboot the system

[root@localhost ~]#reboot

 

To forward LAN, just use these commands:

[root@localhost ~]# iptables –A INPUT –m state –state NEW –m tcp –p tcp –dport 3128 –j ACCEPT

[root@localhost ~]#  systemctl restart iptables

[root@localhost ~]# systemctl restart squid

 

See the internet access log:

[root@localhost ~]# tail –f /var/log/squid/access.log

 

So you’ve successfully set up a proxy server. To check your proxy server, open Firefox browser. Give IP address (Options>>advanced>>network>>connection>setting>>Manual proxy configuration)

Now after pressing ” OK “, just enter any website address, it will work, if you’ve implemented all the steps properly.  Also if you check the access.log file, you can check the log information of browsing.

In the previous post I’ve shown, how to block specific keyword, website or IP address.

Hope that You have enjoyed learning it.