strongSwan is an open-source VPN platform that supports various authentication methods, including certificates and public keys. This tutorial will guide you through the process of installing strongSwan on Kali Linux Latest.
Before installing strongSwan, make sure that you have the following prerequisites:
The first step is to update the system to the latest version to ensure that all packages are up to date.
sudo apt-get update
sudo apt-get upgrade
After updating the system, we can install strongSwan using the following command:
sudo apt-get install strongswan
After installing strongSwan, we need to configure it by creating a configuration file. The configuration file is located at /etc/ipsec.conf, and you can use any text editor to open and edit the file.
sudo nano /etc/ipsec.conf
Then, add the following configuration to the file:
conn %default
ikelifetime=60m
keylife=20m
rekeymargin=3m
keyingtries=1
keyexchange=ikev2
conn myvpn
left=%defaultroute
leftid=server-domain-name-or-IP-address
leftsubnet=0.0.0.0/0
right=%any
rightid=%any
rightsourceip=10.10.10.0/24
auto=add
Replace the server-domain-name-or-IP-address with the server domain name or IP address. Also, replace 10.10.10.0/24 with the IP address range that you want to allow for your clients.
After configuring strongSwan, we need to restart the service to apply the changes:
sudo service strongswan restart
The final step is to configure the firewall to allow incoming VPN connections. We can use ufw, the default firewall in Kali Linux, to configure the firewall rules.
sudo ufw allow OpenSSH
sudo ufw allow 500/udp
sudo ufw allow 4500/udp
sudo ufw enable
This will allow connections to the SSH service and the VPN ports.
In this tutorial, we have shown you how to install strongSwan on Kali Linux Latest. We have also configured the strongSwan, restarted the service, and configured the firewall to allow incoming VPN connections.
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