[Unit]
Description=GPS + PPS chrony time server dashboard
After=network.target chrony.service gpsd.socket
Wants=gpsd.socket

[Service]
ExecStart=/usr/local/bin/gps-clock-dash -listen :8473
# Once nginx fronts this, bind to loopback only:
# ExecStart=/usr/local/bin/gps-clock-dash -listen 127.0.0.1:8473
Restart=on-failure
RestartSec=5

# Unprivileged, sandboxed. chronyc's monitoring commands (tracking, sources,
# sourcestats) work over chronyd's localhost UDP port without privileges.
DynamicUser=yes
NoNewPrivileges=yes
ProtectSystem=strict
ProtectHome=yes
PrivateTmp=yes
PrivateDevices=yes
ProtectKernelTunables=yes
ProtectKernelModules=yes
ProtectControlGroups=yes
RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
RestrictNamespaces=yes
LockPersonality=yes
MemoryDenyWriteExecute=yes
SystemCallArchitectures=native

# Optional: to show the "NTP requests" (serverstats) row, chronyc needs
# chronyd's privileged socket in /run/chrony, which is owned by _chrony.
# Uncomment both lines below. Note this lets the process issue any chronyc
# command, including ones that change chronyd's behaviour.
#DynamicUser=no
#User=_chrony

[Install]
WantedBy=multi-user.target