2ping.service

[Unit]
Description=2ping listener
Documentation=man:2ping(1)
Documentation=https://www.finnie.org/software/2ping/

# Recommended listener method is with python3-netifaces, so we want to
# wait until the network is up before starting, so we can get a full
# list of IPs.
Wants=network-online.target
After=network-online.target

[Service]
ExecStart=/usr/bin/2ping --listen --quiet

# 2ping requires very little; lock down the running space as much as
# possible.
DevicePolicy=closed
LockPersonality=yes
NoNewPrivileges=yes
PrivateDevices=yes
PrivateTmp=yes
PrivateUsers=yes
ProtectControlGroups=yes
ProtectHome=yes
ProtectKernelLogs=yes
ProtectKernelModules=yes
ProtectKernelTunables=yes
ProtectSystem=strict
RestrictAddressFamilies=AF_NETLINK AF_INET AF_INET6 AF_UNIX
RestrictNamespaces=yes
RestrictRealtime=yes
RestrictSUIDSGID=yes
DynamicUser=yes

[Install]
WantedBy=multi-user.target