headscale/docs/packaging/headscale.systemd.service

[Unit]
After=syslog.target
After=network.target
Description=headscale coordination server for Tailscale
X-Restart-Triggers=/etc/headscale/config.yaml

[Service]
Type=simple
User=headscale
Group=headscale
ExecStart=/usr/bin/headscale serve
ExecReload=/usr/bin/kill -HUP $MAINPID
Restart=always
RestartSec=5

WorkingDirectory=/var/lib/headscale
ReadWritePaths=/var/lib/headscale /var/run

AmbientCapabilities=CAP_NET_BIND_SERVICE CAP_CHOWN
CapabilityBoundingSet=CAP_NET_BIND_SERVICE CAP_CHOWN
LockPersonality=true
NoNewPrivileges=true
PrivateDevices=true
PrivateMounts=true
PrivateTmp=true
ProcSubset=pid
ProtectClock=true
ProtectControlGroups=true
ProtectHome=true
ProtectHostname=true
ProtectKernelLogs=true
ProtectKernelModules=true
ProtectKernelTunables=true
ProtectProc=invisible
ProtectSystem=strict
RemoveIPC=true
RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
RestrictNamespaces=true
RestrictRealtime=true
RestrictSUIDSGID=true
RuntimeDirectory=headscale
RuntimeDirectoryMode=0750
StateDirectory=headscale
StateDirectoryMode=0750
SystemCallArchitectures=native
SystemCallFilter=@chown
SystemCallFilter=@system-service
SystemCallFilter=~@privileged
UMask=0077

[Install]
WantedBy=multi-user.target