gentoo-overlay/net-misc/libreswan/files/ipsec.service

[Unit]
Description=Internet Key Exchange (IKE) Protocol Daemon for IPsec
After=syslog.target
After=network.target

[Service]
Type=simple
ExecStartPre=/usr/libexec/ipsec/addconn --config /etc/ipsec.conf --checkconfig
ExecStartPre=/usr/libexec/ipsec/_stackmanager start
ExecStart=/usr/libexec/ipsec/pluto --config /etc/ipsec.conf --nofork
ExecStop=/usr/libexec/ipsec/whack --shutdown
ExecStopPost=/bin/ip xfrm policy flush
ExecStopPost=/bin/ip xfrm state flush
ExecReload=/usr/libexec/ipsec/whack --listen

[Install]
WantedBy=multi-user.target
Alias=libreswan.service
Alias=pluto.service