[Unit]
Description=DDNS Service - Dynamic DNS Update Service
After=network.target

[Service]
Type=simple
User=ddns
Group=ddns
WorkingDirectory=/var/lib/ddns-service
ExecStart=/usr/bin/ddns-service --daemon
ExecReload=/bin/kill -HUP $MAINPID
Restart=on-failure
RestartSec=5

# Security hardening
NoNewPrivileges=yes
ProtectSystem=strict
ProtectHome=yes
PrivateTmp=yes
ReadWritePaths=/var/lib/ddns-service

[Install]
WantedBy=multi-user.target