A Virtual Private Network (VPN) is a connection method used to add security and privacy to private and public networks, like WiFi Hotspots and the Internet. Most of the time, corporations will utilize VPN to protect sensitive data. Or, ordinary web users will use them in parts of the world where there are government restrictions on internet content. Privacy is increased with a Virtual Private Network because the user’s initial IP address is replaced with one from the Virtual Private Network provider.
In other words, when you use a VPN, your IP address is hidden to give you more security and protection. It also helps you to surf those blocked and banned websites you wish to visit.
PPTP (Point-to-Point Tunneling Protocol) is a VPN protocol used to ensure proper communications between a VPN client and a VPN server. It also is available for CentOS Linux. PPTP is a free and open-source (community-supported) enterprise operating system, compatible with its upstream source Red Hat Enterprise Linux, from the CentOS Project.
Administrators rarely use PPTP as a stable protocol. But, its implementation is easier and straight-forward on CentOS Linux. IF you need this configuration and setup, this article suitable to read. In this article, we will describe how to install PPTP VPN on CentOS 8.
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How to set up and install a PPTP VPN on CentOS 8:
Step 1: Install PPP
Installing PPTP completely depends on PPP and PPTPD packages. To do so, first, install the related package and then configure it to initiate configuration. Use the following commands one by one:
Step 2: Configure and Setup your PPTPD
Edit IP settings in: /etc/pptpd.conf as shown in the following:
Edit the following settings to /etc/ppp/options.pptpd:
As you can see, this code will add a DNS server to your VPN server. You can add the DNS servers provided by your internet provider or use Google DNS server and insert them in the file.
Step 3: Create a user to access the VPN server
Add user account in/etc/ppp/chap-secrets (assign username and password) like the following:
Step 4: Enable IP/network forwarding
We need IP forwarding to help VPN route packets between the VPN clients and the outside world. Therefore, the VPN server will become a router:
sudo v1 /etc/sysctl.conf
Now, add the following line:
After running this code, you must save and close the file. Then apply the changes with the following command:
sudo sysctl -p
this command will reserve our setting between system reboots.
Step 5: Setup ”iptables”
Now, you need to add the following IP-tables rules in order to open the correct ports and properly forward the data packets:
Step 6: Start VPN server
Congratulations. You have successfully installed PPTP VPN on your CentOS! these steps will help you to configure the PPTP VPN in a non-GUI way. using these Linux commands, you can easily configure, connect, or even disconnect the PPTP VPN.
In this series of VPS technologies tutorials, we showed you how to install PPTP VPN on CentOS 8 Linux. PPTP protocol does not describe authentication or encryption. Therefore, most of the administrators avoid using that. But it is very straight-forward in CentOS distribution. the intended use of PPTP is to provide similar levels of protection, security, and remote access as typical VPN products. You can use the PPTP control channel over the TCP and a GRE tunnel operating to encapsulate the PPP packets and give them more security and protection.