Install libreswan by entering the following commands in the terminal:
sudo apt update sudo apt install libreswan
Description:
Internet Key Exchange daemon
Libreswan is an IPsec implementation for Linux. It has support for most of the extensions (RFC + IETF drafts) related to IPsec, including IKEv2, X.509 Digital Certificates, NAT Traversal, and many others. . Libreswan has been forked from Openswan 2.6.38, which was forked from FreeS/WAN 1.99. . The Libreswan IKE daemon is named pluto. It was inherited from the FreeS/WAN project, but provides improved X.509 certificate support and other features.
Homepage: https://libreswan.org/
Version: 3.23-4
Section: universe/net