xl2tpd-iptable-nat.service

[Unit]
Description=xl2tpd nat edit iptable
After=network.target auditd.service
# PartOf=xl2tpd.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/sbin/iptables -t nat -A POSTROUTING \
                         -s 192.168.100.128/25 \
                         -j MASQUERADE -o enp0s31f6
ExecStop=/sbin/iptables -t nat -D POSTROUTING \
                        -s 192.168.100.128/25 \
                        -j MASQUERADE -o enp0s31f6

[Install]
WantedBy=multi-user.target