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In this ./note I am going to show you how set up the VPN connection provided by Private Internet Accessin Raspberry PI (but the same steps are valid for any other Linux distribution).
I found these instruction in the Private Internet Accessforum (https://www.privateinternetaccess.com/forum/).
This is something I have been using for awhile now, thought i would show you the entire process, This is a tutorial for setting up a Raspberry Pi VPN router. Requirements for Raspberry Pi VPN Router. Raspberry Pi 3 Amazon Ebay. Private Internet Access Install Raspbian Pixel to your Pi’s sdcard. Use the Raspberry Pi Configuration tool. Sudo raspi-config. To: Boot to console; Configure the right keyboard map and timezone. TechNadu’s Step-by-Step Guide: Here’s How to Set Up a VPN on Raspberry Pi in 2021 Step #1: Check the Required Equipment (If You’re Assembling a Raspberry Pi Device). Many of you have probably already. Step #2: Set up a VPN on Raspberry Pi. First, you need to prepare the VPN’s installation file.
1. If you don’t have done this already, you need to install OpenVPN.
sudo apt-get install openvpn
2. Move to the OpenVPN directory in /ect:
3. Download from the Private Internet Access website the zip folder. This folder contains all the config files for OpenVPN.
4. Unzip the folder using unzip. If you don’t have unzip already installed in your system run the following command:
sudo apt-get install unzip
and then unzip:
sudo unzip openvpn.zip
5. In order to see the list of servers to which you can connect run:
6. As you can see each server config file has .ovpn extension. Now you can run the final command to connect to the server:
Once the previous command is executed you are required to insert your username and password of your Private Internet Access account. If you want to avoid to insert username and password every time you want to connect to the VPN you can follow these steps:
1. Create a .txt file in the /etc/openvpn folder (same folder of the .ovpn file) . You can name this file ‘pass.txt‘
2. In the first two lines of the file put your username and password, like:
3. Save and close the file.
4. Open up your .ovpn and add the following line at the bottom:
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5. Save and try to connect again. You should not be required to insert username and password this time.
In a next post I will show how to connect automatically to the VPN at boot.
This post is not new but I am excited to share my knowledge with you while I am going through this setup. It took me a while to feel that Raspberry Pi can do everything a basic computer can and actually a little more advanced. It’s amazing that a $39 computer can do everything just a regular computer can. Raspberry Pi is officially running on Debian OS (Linux-based). People also make Windows 10 IoT to work Raspberry Pi. So, yes, it has everything you basically need.
Let’s move on to our main topic. My goal today is to setup a OpenVPN client on my Raspberry Pi and share this VPN connection with all of my other devices. Raspberry Pi is limited on its resources because it’s running on a quad-core ARM CPU and 1GB of RAM, so I will say it can handle about 6 devices at a time. I will stress test it after the setup is up and running.
Raspberry Pi Initial Configuration
Raspberry Pi is connecting to my network via WiFi. You can connect the network with Ethernet port as you wish, but for the mobility, I am using WiFi.
When you initially start Raspberry Pi and install the recommended Debian OS. You will need to use the following commands to upgrade your OS.
You wonder what are the differences between dist-upgrade and upgrade. Read the following description. Technically, if your system is up and running, you should think twice before doing sudo apt-get dist-upgrade because the new version of dependencies may corrupt your current configuration. Since this is a new system, I am running all those commands to get the latest and greatest.
upgrade is used to install the newest versions of all packages currently installed on the system from the sources enumerated in /etc/apt/sources.list. Packages currently installed with new versions available are retrieved and upgraded; under no circumstances are currently installed packages removed, or packages not already installed retrieved and installed. New versions of currently installed packages that cannot be upgraded without changing the install status of another package will be left at their current version. An update must be performed first so that apt-get knows that new versions of packages are available.
dist-upgrade in addition to performing the function of upgrade, also intelligently handles changing dependencies with new versions of packages; apt-get has a “smart” conflict resolution system, and it will attempt to upgrade the most important packages at the expense of less important ones if necessary. So, dist-upgrade command may remove some packages. The /etc/apt/sources.list file contains a list of locations from which to retrieve desired package files. See also apt_preferences(5) for a mechanism for overriding the general settings for individual packages.
Next, you need to configure your Raspberry Pi. This step is not so important. You only need it to make changes such as changing your root password, your host name, your timezone, keyboarding map, enabling/disabling SSH, etc.
Static IP Address
Some people like setting static IP address. In my configuration, I choose not to use it. Instead, I am using DHCP Reservation to fix my Raspberry Pi’s IP address. However, if you like manually setting it. These are the commands
First, find out the names of your network interfaces with this simple command
Then use nano editor to edit the network interfaces configuration file
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Example of the network interfaces’ file content
Download and install the VPN Client
Installing OpenVPN client
Downloading your client configuration file
You can copy the client configuration file to a flash drive or you can download it from the internet. In this example, I am showing you how to download the client files from Private Internet Access service.
You will now need tn uncompress the zip file. After -d the name of the directory you want the files to be unzipped into.
Your client file may have already contained all the information such as CA certificate and PEM control key. In this example, the files are separate from the client file. So you will need to copy them to your OpenVPN program directory.
Private Internet Access (PIA) requires a username and password authentication. You will need to create a login file that contains your user name and password that you have with PIA.
Below is the example of the content in login.pia file.
Now let’s edit the client file US.conf. You will need to use the nano program to edit the client file. In nano editor, look for the lines that start with auth-user-pass, ca, and crl-verif. Below is the example of the lines that are changed in the US.conf client file.
It’s recommended that you reboot your Raspberry Pi by doing one of the following commands
Testing the VPN client file
I constantly make mistakes while editing these files. Let’s test the file before we move on to the next step. In order to test the file, we simply have to call the OpenVPN program with the client file. First, check your current public IP address by opening up your web browser and going to http://whatismyip.host. Then do the following command
If you see errors, you should try to determine if you misconfigure the client file… Let’s try the website http://whatismyip.host. The IP address should now show a different one from your public IP address.
Route Forwarding and Routings/IP tables
Now we are getting more serious.
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First of all, we need to enable Route Forwarding so that the traffic can move between our local area network and virtual private network. To turn it on, you need to edit the sysctl.conf file
Find the line #net.ipv4.ip_forward =1 and remove #
After saving the file, you can enable the service by the following command
Now, let’s get started with IPtables. I need to tell the Raspberry Pi how to route the traffics. There are 3 interfaces that we are working on in this current setup example; VPN tunnel (tun0), WiFi (wlan0), and loopback (lo). There are the three interfaces that network traffic will be running around.
- Allow traffic to flow in and out the loopback
- Allow traffic to move in from LAN and out to VPN
- Open up some ports for VPN traffic, NTP, DHCP. These are required by OpenVPN. In our example, OpenVPN is using the port 1198
- Allow DHCP (port 67, 68) on all networks
- Forward traffic from VPN to WLAN only when the VPN is established. This is known as a kill switch
- Forward traffic from WLAN to VPN
- Masquerade all the traffic together
Now let’s save all these rules. Otherwise, they will be forgotten after a reboot. IPtables-persistent tool needs to be downloaded if you have not downloaded it yet. While installing this, it will ask you couple of questions to confirm that you want to save these rules.
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If you have already downloaded this tool, you can use the following command to save the rules.
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Now let’s start those routing rules
Now everything is setup. The Raspberry Pi should be able to route traffic between the local area network and virtual private network. Start your VPN and change your device’s gateway to point to the Raspberry Pi’s IP address. In this example, it is 192.168.1.3 (look all the way up in the static IP address section)