Install charon-systemd by entering the following commands in the terminal:
sudo apt update sudo apt install charon-systemd
Description:
strongSwan IPsec client, systemd support
The strongSwan VPN suite uses the native IPsec stack in the standard Linux kernel. It supports both the IKEv1 and IKEv2 protocols. . This package contains the charon-systemd files.
Homepage: http://www.strongswan.org
Version: 5.6.2-1ubuntu2
Section: universe/net