[Unit]
Description=ICMP Tunneling Daemon
After=syslog.target network.target

[Service]
Type=forking
EnvironmentFile=/etc/conf.d/hans
Restart=on-abort

ExecStart=/usr/bin/hans -s $HANS_IP -d $HANS_DEV -p $HANS_PASS

ExecStartPost=/usr/bin/ip link set dev $HANS_DEV mtu 1200
ExecStartPost=/usr/bin/sysctl -w net.ipv4.ip_forward=1
ExecStartPost=/usr/bin/iptables -t nat -A POSTROUTING -o $HANS_WAN -j MASQUERADE
ExecStartPost=/usr/bin/iptables -A FORWARD -i $HANS_DEV -j ACCEPT

ExecStopPost=/usr/bin/iptables -D FORWARD -i $HANS_DEV -j ACCEPT
ExecStopPost=/usr/bin/iptables -t nat -D POSTROUTING -o $HANS_WAN -j MASQUERADE

[Install]
WantedBy=multi-user.target