Monday, September 19, 2022

How To Setup VPN On Linux

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Configure An Ip Address Manually

How To Setup An OpenVPN Server Linux

Set your static IP address, prefix, gateway, and DNS resolver with the following command but substituting your own IP addresses:

$ sudo nmcli connection modify ens3 ipv4.addresses 10.10.10.97/24$ sudo nmcli connection modify ens3 ipv4.gateway 10.10.10.1$ sudo nmcli connection modify ens3 ipv4.dns 10.10.10.10$ sudo nmcli connection modify ens3 ipv4.method manual$ sudo nmcli connection modify ens3 connection.autoconnect yes

Set a hostname:

$ sudo hostnamectl set-hostname OVPNserver2020

If you run a local DNS server, you will want to set up a DNS entry with the hostname pointing to the VPN server IP Address.

Reboot and make sure the system has the correct networking information.

How To Install And Connect The Openvpn Client For Windows

Open the OpenVPN client URL, you will be able shown links to client downloads for different operating systems.

Choose the Windows version and run the installation.

Once the installation is complete, you will be prompted for the OpenVPN username and password. The server IP will be auto-populated.

You can use the OpenVPN icon from your Windows taskbar to disconnect, reconnect and view connection status.

Install Protonvpn In Linux

With the ProtonVPN account already created, the next step is to install ProtonVPN. The VPN leverages the IKEv2/IPSec and OpenVPN protocols. OpenVPN protocol supports both TCP and UDP and for this reason, we will use OpenVPN on our Linux desktop.

To install OpenVPN, run the following commands:

Install OpenVPN in Debian/Ubuntu

Then install ProtonVPN CLI using the pip package manager.

$ sudo pip3 install protonvpn-cli

Install OpenVPN in RHEL/CentOS 8 and Rocky Linux

On Red Hat derivatives such as RHEL/CentOS, Fedora, and Rocky Linux, run the commands shown.

$ sudo dnf install -y openvpn dialog python3-pip python3-setuptools$ sudo pip3 install protonvpn-cli

Install OpenVPN in ArchLinux / Manjaro

For Arch-based distributions, run the commands shown.

$ sudo pacman -S openvpn dialog python-pip python-setuptools$ sudo pip3 install protonvpn-cli

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Set Up A Linux Vps Server With Openvpn For Tunnelling

Enable IP forwarding in your kernel by using the below command:

echo 'net.ipv4.ip_forward=1' | sudo tee -a /etc/sysctl.d/99-sysctl.conf

This enables traffic forwarding over IPv4. To apply these changes, use the below command:

sudo sysctl -p

OpenVPN does not support simultaneous tunnels over IPv6 and IPv4, so you can disable IPv6 using:

sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1

To disable IPv6 manually, add the below parameters to be set on boot. These parameters should be added to the 99-sysctl.conf file located at /etc/sysctl.d/. Simply use the cd command to access the folder, and use your preferred text editor to edit the file. Remember to save the changes made!

net.ipv6.conf.all.disable_ipv6 = 1net.ipv6.conf.default.disable_ipv6 = 1net.ipv6.conf.lo.disable_ipv6 = 1net.ipv6.conf.eth0.disable_ipv6 = 1

Next, you can activate the new settings by using:

sysctl -p

Next, in the file hosts located at /etc/ comment the IPv6 resolution line as shown below:

#::1  localhost ip6-localhost ip6-loopback

With this, we have disabled IPv6. Next login again to the Admin server URL and go to the VPN settings.

In the Routing section, the option Should VPN clients have access to private subnets ? should be set as No:

The option Should client Internet traffic be routed through the VPN? should be set to Yes.

This completes our set up for OpenVPN server. Next, we can check the client installations.

Why Use A Linux VPN Server

How to set up anonymous VPN PPTP at Ubuntu Linux

VPN comes with certain benefits. Few of these are highlighted below:

  • Security VPN provides better and stronger protection since all data is encrypted. This provides additional security as compared to Firewalls.
  • Remote Access to ensure high security, many organizations, government and defense offices allow remote access only through their VPN
  • ISP encryption ISP stands for Internet service provider. If you use a public Wi-Fi connection, the ISP can read all your unencrypted data. By using a VPN, you can keep your data secure and encrypted by not allowing even the ISP to read it.
  • Anonymity a VPN lets users maintain anonymity while browsing over the Internet. The IPs are not traceable.
  • IP Change VPN allows users to change their IPs and browse safely. This in certain cases is used in regions that have location-based restrictions
  • Unblock websites certain websites are blocked in a few geographical regions. A VPN maintains anonymity and hence is commonly used to bypass Internet censorship to unblock websites
  • Throttling certain ISPs throttle user bandwidth based on the content. Such throttling can be avoided by using a VPN

At a higher level, a VPN makes your transactions secure by using encryption.

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Download The Openvpn Configurations

Now you have to select your VPN service that youll be using to set up VPN on your Linux distro. It is important to note that you have to select the OpenVPN configuration files of your VPN service for the set up. To get your OpenVPN configurations, you have to sign in to your VPN account and check in the Linux support or OpenVPN support slot . The files youd get would be in a Zip Archive. For efficient running of our VPN, it would be better to create a separate directory for it. To do this, enter in the terminal:

filename here refers to the name of your directory. For example, in my case, it was:

Next we have to enter into this directory that we just created. To do this, we have to enter the command:

Again filename here refers to your directory name that you created before. Something like this:

Since our file is in a Zip format, we have to first unzip to access it. This can be done by entering the following command:

filename.zip here refers to the zipped file that you downloaded. This will look like this:

Install The Client Configuration

Now, well discuss how to install a client VPN profile on Windows, OS X, iOS, and Android. None of these client instructions are dependent on one another, so feel free to skip to whichever is applicable to you.

The OpenVPN connection will be called whatever you named the .ovpn file. In our example, this means that the connection will be called client1.ovpn for the first client file we generated.

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Configure The Ca Variables

To configure the values our CA will use, we need to edit the vars file within the directory. Open that file now in your text editor:

          
  • nano vars

Inside, you will find some variables that can be adjusted to determine how your certificates will be created. We only need to worry about a few of these.

Towards the bottom of the file, find the settings that set field defaults for new certificates. It should look something like this:


Edit the values in red to whatever youd prefer, but do not leave them blank:


While we are here, we will also edit the KEY_NAME value just below this section, which populates the subject field. To keep this simple, well call it server in this guide:

When you are finished, save and close the file.

How To Easily Install Nordvpn Using Openvpn On Linux

How to Install a Free VPN on Linux (Any Distro)

Mar 06, 2021 ·How to manually set up NordVPN using OpenVPN on Linux. The prerequisite here is that you know how to open a terminal and how to connect to a device through SSH. Lets jump right onto the device. No screenshots today as I took notes while exploring and didnt think about it at the moment. Also, I repeated this process enough that you can …

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Connect To A VPN Server Location

In the Terminal window, run this command:

expressvpn connect

If you are connecting for the first time, ExpressVPN will use the Smart Location feature to select a server location, which is recommended to you based on factors such as speed and proximity.

If this is not your first time connecting, ExpressVPN will connect to the server location you were most recently connected to.

Once you are successfully connected, you will see the Connected to message in green.

Note: A single ExpressVPN subscription can be used simultaneously on five devices, regardless of platform. If you try to use more than five devices simultaneously with one subscription, you will see the screen below:

How Do I Set Up Nordvpn On Raspberry Pi

Sep 23, 2021 ·1. Visit Download NordVPN for Linux.. 2. Click Download .deb and download the file.Ignore any warning you may receive during download as the file is completely safe for download. 3. Click on the downloaded file in Chromium to open it.A pop-up window will appear with two options, Cancel and Install.Click on Install to start the installation process.

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How Do I Add A New Client

For demo purpose I added a new device called googlephone. Let us add one more device called googlephone by running the script again:$ sudo bash openvpn-install.sh

Looks like OpenVPN is already installedWhat do you want to do?   1) Add a cert for a new user   2) Revoke existing user cert   3) Remove OpenVPN   4) ExitSelect an option : 

Select option 1 and type googlephone as a client name:

Tell me a name for the client certPlease, use one word only, no special charactersClient name: googlephoneGenerating a 2048 bit RSA private key.........+++.................................................................................................+++writing new private key to '/etc/openvpn/easy-rsa/pki/private/googlephone.key.FNaDMaP56c'-----Using configuration from /etc/openvpn/easy-rsa/openssl-1.0.cnfCheck that the request matches the signatureSignature okThe Subject's Distinguished Name is as followscommonName            :ASN.1 12:'googlephone'Certificate is to be certified until Sep 25 07:31:46 2027 GMT  Write out database with 1 new entriesData Base Updated Client googlephone added, certs available at ~/googlephone.ovpn

Now you can use googlephone.ovpn with Google Android phone. You can add as many users you want using this method.

Adjust The Ufw Rules To Masquerade Client Connections

How to Setup a VPN Client on Linux

If you followed the Ubuntu 16.04 initial server setup guide in the prerequisites, you should have the UFW firewall in place. Regardless of whether you use the firewall to block unwanted traffic , we need the firewall in this guide to manipulate some of the traffic coming into the server. We need to modify the rules file to set up masquerading, an iptables concept that provides on-the-fly dynamic NAT to correctly route client connections.

Before we open the firewall configuration file to add masquerading, we need to find the public network interface of our machine. To do this, type:

          
  • ip route | grep default

Your public interface should follow the word dev. For example, this result shows the interface named wlp11s0, which is highlighted below:

Outputdefault via 203.0.113.1 dev wlp11s0  proto static  metric 600

When you have the interface associated with your default route, open the /etc/ufw/before.rules file to add the relevant configuration:

          
  • sudo nano /etc/ufw/before.rules

This file handles configuration that should be put into place before the conventional UFW rules are loaded. Towards the top of the file, add the highlighted lines below. This will set the default policy for the POSTROUTING chain in the nat table and masquerade any traffic coming from the VPN:

Note: Remember to replace wlp11s0 in the -A POSTROUTING line below with the interface you found in the above command.

Save and close the file when you are finished.

          
  • sudo nano /etc/default/ufw

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Setting Up The Client:

  • To start the program, simply enter globalprotect and then a prompt should display.
  • From the prompt, run connect -portal gp.rose-hulman.edu
  • Login with your email address as your username and password.
  • Type quit to exit the prompt.
  • You will now be connected to the Global Protect VPN. You will be able to use all the network resources as if you were on campus.

    How To Use Nordvpn Command

    Feb 04, 2019 ·$ sudo apt install /tmp/nordvpn-release_1.0.0_all.deb Update package index. $ sudo apt update Install nordvpn utility. $ sudo apt install nordvpn Usage. Display usage information. $ nordvpn help Welcome to NordVPN Linux client app! Version 2.2.0-0 Website: https://nordvpn.com Usage: nordvpn command [arguments …

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    How To Install And Connect The Openvpn Client For Android

    First, go to the Google Play store and search for OpenVPN Connect. Install the OpenVPN Connect app.

    Once opened, it will display three options Private Tunnel, Access Server, and OVPN Profile.

    Select Access Server and fill in all the details manually:

    • Title set your preferred name for the connection
    • Access Server Hostname the IP of your Linux VPN server
    • Port the port 934 of your Linux VPN server
    • Username the username set on your server openvpn by default
    • Password the password you set in the console while setting up the Linux VPN Server in the terminal environment

    Or alternatively, you can import the .ovpn file for the profile. You can get the connection profile from the client UI.

    Connect To The VPN Through Command Line

    How to set up a Linux VPN server (script)

    Connecting to the VPN through the Command line is more reliable and lets users test the VPN connection as well. Copy the downloaded *.ovpn configuration file to the client folder of your OpenVPN.

    Command to test the connection-

    The command screen should appear as below.

    If no error appears. It means the VPN works fine. You may run an internet test by opening any website on the browser. If you check your public IP address, your server IP should be seen and this would tell that traffic is running through the private server.

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    Creating A Configuration Generation Script

    Next, we will create a simple script to compile our base configuration with the relevant certificate, key, and encryption files. This will place the generated configuration in the ~/client-configs/files directory.

    Create and open a file called make_config.sh within the ~/client-configs directory:

              
    • nano ~/client-configs/make_config.sh

    Inside, paste the following script:

    #!/bin/bash# First argument: Client identifierKEY_DIR=~/openvpn-ca/keysOUTPUT_DIR=~/client-configs/filesBASE_CONFIG=~/client-configs/base.confcat $ \<  \    $/ca.crt \<  \    $/$.crt \<  \    $/$.key \<  \    $/ta.key \<  \>  $/$.ovpn

    Save and close the file when you are finished.

              
    • chmod 700 ~/client-configs/make_config.sh

    Sign Up For A Protovpn Account

    The first step, before anything else, is to create a ProtonVPN account. You can do so by heading over to the Offical ProtonVPN website and clicking on the Pricing tab.

    Proton VPN provides 4 pricing models namely: Free, Basic. Plus and Visionary. For demonstration purposes, we will use the Free plan which allows you to test ProtonVPN free of charge for up to 7 days. With the Free plan, you get access to 23 servers spread out across 3 countries.

    So, click on the GET FREE button under the Free option.

    This takes you to the Sign-up page whereupon you will be required to fill in your details. An OTP will be sent to your email account to activate your account.

    Once logged in, head over to the left sidebar and click on Account then OpenVPN / IKEv2 username option. This will display the OpenVPN / IKEv2 username & password details.

    Copy and paste these details somewhere else because you will need them later in this guide during the configuration of Proton VPN.

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    Adjust The Openvpn Configuration

    Now that our files are in place, we can modify the server configuration file:

              
    • sudo nano /etc/openvpn/server.conf

    Basic Configuration

    First, find the HMAC section by looking for the tls-auth directive. Remove the to uncomment the tls-auth line:

    tls-auth ta.key 0 # This file is secret

    Next, find the section on cryptographic ciphers by looking for the commented out cipher lines. The AES-128-CBC cipher offers a good level of encryption and is well supported. Remove the to uncomment the cipher AES-128-CBC line:

    cipher AES-128-CBC

    Below this, add an auth line to select the HMAC message digest algorithm. For this, SHA256 is a good choice:

    auth SHA256

    Finally, find the user and group settings and remove the at the beginning of to uncomment those lines:

    user nobodygroup nogroup

    Push DNS Changes to Redirect All Traffic Through the VPN

    The settings above will create the VPN connection between the two machines, but will not force any connections to use the tunnel. If you wish to use the VPN to route all of your traffic, you will likely want to push the DNS settings to the client computers.

    You can do this, uncomment a few directives that will configure client machines to redirect all web traffic through the VPN. Find the redirect-gateway section and remove the semicolon from the beginning of the redirect-gateway line to uncomment it:

    push "redirect-gateway def1 bypass-dhcp"
    push "dhcp-option DNS 208.67.222.222"push "dhcp-option DNS 208.67.220.220"
    # Optional!port 443

    How To Set Up A VPN With Linux: A Comprehensive Beginners Guide

    How To Setup Virtual Private Network (VPN) In Linux Ubuntu ...

    A VPN or a Virtual Private Network basically means creating a secure private network using public infrastructure. This process helps create a protected network that can help employees of the same company but based in different parts of the world work together in a setting that provides the utmost privacy and confidentiality. It can also be used by home users who value privacy and dont want prying eyes to glance at everything that they do and see.

    The encryption that is present in a VPN helps the two or more interacting parties keep their shared information secret and does not let others get an idea of the things that are being discussed. This is how an encrypted connection between two or more computers that are present in far off locations can go a long way in giving complete freedom to people who are interested in safeguarding their web history from anybody who wishes to monitor the same.

    This guide helps you understand how to use the VPN service in Linux. The use of VPNs has proliferated in the current online world, and this has resulted in many operating systems using this facility including Linux. There might be some differences in the different ways of operating distros and desktops however, you will quickly understand that you can get many configuration options for VPNs in the same place that you configure the rest of your network settings.

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    Do I Need A VPN With Linux

    Yes, you need a VPN with Linux. The danger of being hacked may be a bit lower than for the regular Windows user. Yet areas where Linux VPN can help you are still massive:

    • A VPN obscures your traffic from your ISP or anyone else whod like to spy on it. Instead of knowing what websites youre visiting or that youre streaming/gaming/sharing files, theyll only see VPN traffic.
    • Censorship and firewalls dont care about your operating system, and can affect even something as simple as your access to news or social media sites.

    In fact, most of the points outlined here apply to Linux users as well.

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