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How To Install IKE VPN Client on Ubuntu 20.04

Ubuntu 15

In this comprehensive guide, we will walk you through the process of installing the IKE VPN client on Ubuntu 20.04. The IKE (Internet Key Exchange) VPN client is an open-source VPN client that supports various VPN gateways.

Quick Answer

To install the IKE VPN client on Ubuntu 20.04, you need to install the necessary dependencies, download the client source code, extract the downloaded file, build and install the client, start the IKE daemon, and connect to the VPN server.

Prerequisites

Before we start, ensure that you have the following:

  • A system running Ubuntu 20.04.
  • Sudo privileges to execute administrative commands.
  • Stable internet connection.

Installing Dependencies

First, we need to install the necessary dependencies for the IKE VPN client. Open the terminal and run the following command:

sudo apt-get install build-essential libssl-dev libaudio-dev libcups2-dev cmake libedit-dev g++

This command installs the required packages for building the IKE VPN client. The build-essential package includes necessary tools like gcc and make. The libssl-dev, libaudio-dev, libcups2-dev, cmake, libedit-dev, and g++ are libraries required by the IKE VPN client.

Downloading the IKE VPN Client

Next, download the IKE VPN client source code from the official website using the following command:

wget https://www.shrew.net/download/ike/ike-2.2.1-release.tgz

This command uses the wget utility to download the file from the provided URL.

Extracting the Downloaded File

After downloading the file, extract it using the following command:

tar -xvzf ike-2.2.1-release.tgz

This command uses the tar utility to extract the downloaded tar.gz file. The -xvzf option specifies to extract (-x), verbosely show the progress (-v), deal with gzipped files (-z), and specifies the file (-f).

Building and Installing the IKE VPN Client

Navigate to the extracted directory and build the IKE VPN client using the following commands:

cd ike
cmake -DCMAKE_INSTALL_PREFIX=/usr -DQTGUI=NO -DETCDIR=/etc -DNATT=YES
make
sudo make install

The cmake command configures the build process. The -DCMAKE_INSTALL_PREFIX=/usr sets the installation path. The -DQTGUI=NO disables the QT GUI. The -DETCDIR=/etc sets the directory for the configuration files. The -DNATT=YES enables NAT-Traversal.

The make command compiles the source code. The sudo make install installs the compiled IKE VPN client.

Starting the IKE Daemon

After successfully installing the IKE VPN client, start the IKE daemon using the following command:

sudo iked

This command starts the IKE daemon which is necessary for establishing VPN connections.

Checking the Installation

To verify that the IKE VPN client was installed successfully, check the ~/.ike/sites/ directory for the configuration file.

Connecting to the VPN Server

Finally, connect to the VPN server using the following command:

ikec -r yourServer -a

Replace yourServer with the name of your VPN server. The -r option specifies the name of the VPN site to connect to. The -a option attempts to auto-connect to the VPN site.

Conclusion

Congratulations! You have successfully installed the IKE VPN client on Ubuntu 20.04. You can now establish VPN connections from your Ubuntu system. For more information on using the IKE VPN client, refer to the official documentation at https://www.shrew.net/support/wiki/HowtoIke.

What is the IKE VPN client?

The IKE (Internet Key Exchange) VPN client is an open-source VPN client that supports various VPN gateways. It allows users to establish secure VPN connections.

How do I install the necessary dependencies for the IKE VPN client?

To install the necessary dependencies for the IKE VPN client, open the terminal and run the following command:

sudo apt-get install build-essential libssl-dev libaudio-dev libcups2-dev cmake libedit-dev g++

This command will install the required packages for building the IKE VPN client.

How do I download the IKE VPN client source code?

To download the IKE VPN client source code, use the following command:

wget https://www.shrew.net/download/ike/ike-2.2.1-release.tgz

This command will download the source code from the provided URL.

How do I extract the downloaded file?

To extract the downloaded file, use the following command:

tar -xvzf ike-2.2.1-release.tgz

This command will extract the downloaded tar.gz file.

How do I start the IKE daemon?

To start the IKE daemon, use the following command:

sudo iked

This command will start the IKE daemon, which is necessary for establishing VPN connections.

How can I check if the IKE VPN client was installed successfully?

To check if the IKE VPN client was installed successfully, you can verify the presence of the configuration file in the ~/.ike/sites/ directory.

How do I connect to the VPN server using the IKE VPN client?

To connect to the VPN server using the IKE VPN client, use the following command:

ikec -r yourServer -a

Replace yourServer with the name of your VPN server. This command will attempt to auto-connect to the specified VPN site.

Where can I find more information on using the IKE VPN client?

For more information on using the IKE VPN client, you can refer to the official documentation at https://www.shrew.net/support/wiki/HowtoIke.

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