View source for How to Install Squid Proxy Server on Cento7

==How to Install Squid Proxy Server on Cento7==

This will be running on a CENTOS/RHEL 7 VM with minimum specs.
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# https://www.vultr.com/
# https://www.digitalocean.com/
# https://www.linode.com/
# https://www.thermo.io/

===Install Squid Server===
This will be running on a CENTOS/RHEL 7 VM with minimum specs.

Make sure to have your server up-to-date by running

 yum -y update

Next, we need to install Squid Proxy by running the following command:

 yum -y install squid

Once your Squid has been successfully installed you can go ahead and start the program immediately

 systemctl start squid

Do not forget to enable the squid service in order to start automatically at boot.

 systemctl enable squid

It is important to check on the Squid status just to make sure that everything is working fine.

 systemctl status squid

You should get dialog with a saying its running..

===Configure Squid to Allow your IP===

You will need to edit the configuration file and add your connecting ips or ranges.

 vi /etc/squid/squid.conf

How to allow a range of IP addresses to access the Internet through your proxy server

It is just as simple as adding a new ACL entry, Squid supports CIDR notation which makes the job more simple, for example, if you want to allow a range of IPs from 192.168.241.1 to 192.168.241.255 then you will need to add the following entry:

Find the line that starts with # should be allowed and add your ip/range below that.

 acl localnet src 192.168.241.0/24 # My new ACL
Or your work IP 
 acl localnet src 75.12.56.124 #Work IP

Last but not least restart squid to make the change active.

 systemctl restart squid

===Change Squid Default Port===

If you feel the need of changing the Squid default port, you just need to modify:

 vi /etc/squid/squid.conf

Then find the following line and change the port

 Squid normally listens to port 3128
 http_port 3128

Change to that your next favorite number

 http_port 1337

===Allowing access in firewalld===

 firewall-cmd --permanent --add-port=1337/tcp
 firewall-cmd --reload

There is nothing else to say at this moment if you need to go a little bit more in deep about Squid go and check out their website http://www.squid-cache.org/ their documentation is pretty good.

Hope you enjoyed this tutorial and do not forget to share it.