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Sunday, January 24, 2021

How to Install OpenVPN in Ubuntu Linux: A Tutorial for Newbie

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A virtual private network is a network configuration to safely browse the internet without allowing anyone to know your identity. A VPN setting can encrypt your browsing data and hide your public IP address, DNS, and URL. You can visit the restricted and blocked websites by using a VPN service. A VPN service can be used over WiFi, cellular data, or broadband internet. When you want to use a VPN service to bypass your identity, the most confusing dilemma comes in front of you, which VPN should you try? Which is safer than any other virtual private network? In my opinion, the OpenVPN is one of the most used and finest private network services to use in your Ubuntu Linux.

Working Mechanism of OpenVPN

VPN was first created for the giant tech companies who need to secure their data, but nowadays, the VPN services are available for everyone. Normally your computer access the internet directly through your internet service provider, while the VPN makes a tunnel to establish your internet connection more secure and private.

In that case, the virtual server access the internet on your behalf. A VPN service is important if you want to watch content from any streaming website with a restriction policy based on geo-location. Despite having a few disadvantages of using a VPN service, it is safe to use a VPN while using public WiFi.

The OpenVPN uses the cipher algorithm to make your data private and safe. The OpenVPN can also mask your physical location by encrypting the total channel, applying the hash function, and implementing the encrypted handshake method. In this post, we are going to learn how to install OpenVPN in Ubuntu Linux. The primary key features of the OpenVPN are given below for better visual representation.

  • Individual Business and Personal VPN Service
  • 256-bit Encryption Method
  • Open-source Software
  • Crypto API Support
  • OpenSSL Security to Establish Connections
  • Can be Used Over almost Evey Cross-Platform

Step 1: Check Your IP Address

Computer and other devices can get connected to the internet through an IP (Internet Protocol) address. Your location, time zone, and other details can be found by the IP address. A VPN hides your IP address and mask your exact location. When you bypass the internet traffic through a Vpn client, your physical address is no longer detectable by anyone.

In the beginning, you should check the IP address that your ISP gave you, next when the OpenVPN installation will be finished, you will find a new virtual IP address. You can use the following Domain Information Groper (DIG) command to get your IP address.

dig +short myip.opendns.com @resolver1.opendns.com

Step 2: Install OpenVPN on Ubuntu Linux

In this step, we will see how to install the OpenVPN on our Ubuntu Linux. We will use a cURL command in the terminal shell to download the script file. After downloading the script file, we will chmod command to change access permission of the script file, then we will run a bash command to start the installation process of OpenVPN. If you don’t have the cURL tool installed inside your Ubuntu machine, you can use the following terminal command line to install the cURL.

sudo apt install curl

Now, run this cURL command in your terminal shell to grab the OpenVPN installer script file. The openvpn-install.sh file will be downloaded and stored inside the home directory of your Ubuntu Linux.

curl -O https://raw.githubusercontent.com/angristan/openvpn-install/master/openvpn-install.sh

Run the chmod command and bash command one after another to initialize the installation process of OpenVPN. In the installation process, you will be asked to choose several options to proceed.

If your internet connection has IPv6 support, you will be able to choose the IPv6 configuration. You will also get options to select port, protocol, DNS, traffic compression, and customize encryption settings.

chmod +x openvpn-install.sh
sudo bash openvpn-install.sh

OpenVPN in Ubuntu Linux install

Finally, you will be asked to give the name of your VPN connection. The VPN settings file will be saved inside the /home/<user_name>/name.ovpn. directory. You have to keep this file to import the OpenVPN settings in your Ubuntu network manager settings. Note your IPv4 address, you will need this address to import the VPN settings into the network manager.

Step 3: Check IP and Port of OpenVPN

A virtual private network creates a virtual IP and port to route the traffic into a virtual server. In Ubuntu Linux, the default OpenVPN port is 1194. You can check the listening port of OpenVPN from the terminal shell using the tupln command.

Now, to check the virtual IP address of OpenVPN, run the terminal command given below. The virtual IP is also known as tunnel IP. Look for the tun0 syntax to find the virtual IP address.

sudo ss -tupln | grep openvpn 
ip add

ip add

Step 4: Install the OpenVPN Client on Ubuntu Linux

In this step, we will see how to install the OpenVPN daemon inside Ubuntu Linux. The installation process is very straightforward; you just need to run an apt-install command in the Ubuntu terminal shell.

After installing the OpenVPN daemon, you must also install the OpenVPN configuration inside the Ubuntu network manager. The network manager will be used later to establish the VPN connection. The daemon program will allow the OpenVPN to run in the system background.

  • Install the OpenVPN Daemon
sudo apt install openvpn
  • Install the OpenVPN Network Manager
sudo apt install network-manager-openvpn

Step 5: Enable & Start the OpenVPN on Ubuntu Linux

After all the installation and IP checking are done, now it’s time to start the OpenVPN services in your Ubuntu machine. Use the following terminal command lines to start, enable, and check the status of the OpenVPN on your Linux machine. If you have configured the OpenVPN correctly, you will be able to see the active status, VPN directory, and process identification number (PID).

sudo systemctl start openvpn 
sudo systemctl enble openvpn
sudo systemctl status openvpn

OpenVPN in Ubuntu Linux status

To stop all the running processes of OpenVPN in your Ubuntu machine, run the following kill command in the terminal shell.

sudo killall openvpn

Step 6: Import the OpenVPN Configuration to Network Manager

Previously we have created a file that includes the OpenVPN settings. Now we have to import the file to the network settings from the home directory. To import the settings, first, we have to open the file directory using the terminal shell.

Then we will use a Secure Copy (SCP) command to copy and apply the settings inside the VPN server form the local directory. We have to use the specific IP address (gateway) we found earlier while installing the OpenVPN script file.

Be careful about using the IP address; you must use your Public IPv4 address to import the configuration settings in the network manager. If you find any trouble to run the SCP command, make sure that your network is not running behind any running Network address translation (NAT) module.

cd ~
/home/jahid/ubuntupit.ovpn. scp [email protected]:/home/jahid/jahid.ovpn.

OpenVPN in Ubuntu Linux scp

To access the OpenVPN settings from the Ubuntu Network Manager, you need to import the OpenVPN settings inside the Network settings. To add a VPN network in the Network Manager, we need to Open the connectivity settings and click on the plus icon of the VPN setting. Then we have to choose the ‘Import from file‘ option select and import the configuration file.

OpenVPN in Ubuntu Linux import1

Now, select the .ovpn file from your home directory to finalize the import process.

import ovenvpn on ubuntu

Finally, you will be able to toggle the VPN button to connect the OpenVPN in your Ubuntu Linux. You can also connect and disconnect the VPN service from the Ubuntu top bar.

OpenVPN in Ubuntu Linux vpn connected

Step 7: Firewall Settings for OpenVPN on Ubuntu

As we all know that Ubuntu uses the UFW firewall system to manage the incoming and outgoing network traffic, so to get an uninterrupted internet connection through the OpenVPN, we need to configure the firewall settings for the OpenVPN.

I have mentioned earlier that the OpenVPN uses the User Datagram Protocol (UDP), and the default port of OpenVPN is 1194. So we will allow the port against the connection protocol.

ufw allow 1194/udp

You can also edit the firewall setting script using the Nano editor to edit the default forward policy for OpenVPN. Open the script and find the  syntax DEFAULT_FORWARD_POLICY, then change the value from DROP to ACCEPT. Then save the script and exit the file.

sudo nano /etc/default/ufw

Step 8: Remove OpenVPN on Ubuntu Linux

Till now we have seen how to install and configure the OpenVPN on Ubuntu Linux. Now we will see how to remove and clean the OpenVPN from Ubuntu. You can use the following terminal command lines to uninstall and delete the configuration files from your filesystem.

sudo apt-get remove openvpn
sudo apt-get autoremove openvpn
sudo apt-get purge openvpn
sudo apt-get autoremove --purge openvpn

You can also try removing the OpenVPN by using the installation bash commands. Once the OpenVPN is installed inside your machine, you can’t install it again. If you run the installation command again, it will give you options to add a new user, revoke existing users and remove OpenVPN from your Ubuntu Linux machine. You can choose the ‘Remove OpenVPN‘ option to remove the OpenVPN from your machine.

OpenVPN in Ubuntu Linux remove

Final Thoughts

Before installing the OpenVPN in your Ubuntu Linux, you need to know what type of virtual private network you need? The OpenVPN is mostly used to establish a secure shell private network connection. If you want to use a Point-to-Point Tunneling Protocol VPN or an Internet Protocol Security VPN, then you should give a second thought before installing the OpenVPN in your machine.

In this post, I have described the steps of how to install and configure the OpenVPN daemon in your Ubuntu Linux. I’ve also explained the working method and key features of the OpenVPN. In case you are searching for an end-to-end encrypted virtual private network, then the OpenVPN is appropriate for you. Using a virtual private network is totally safe and legal.

If you find this post useful and informative, please share it with your friends and the Linux community. Let us know which VPN is the most trustworthy to you. Write your opinions in the comment segment.

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