[Unit]
Description=DHCPv4 Server Daemon
Documentation=man:dhcpd(8) man:dhcpd.conf(5)
Wants=network-online.target
# ldap.service: probably LDAP server starts first and dhcpd must start providing DHCP server only after LDAP has started to use LDAP for IP addresses (?)
After=network-online.target time-sync.target ldap.service

[Service]
Environment=CONFIGFILE=/etc/dhcpd.conf LEASEFILE=/var/lib/dhcpd/dhcpd.leases
EnvironmentFile=-/etc/sysconfig/dhcpd
Type=forking
ExecStart=/usr/sbin/dhcpd -pf /run/dhcpd/dhcpd.pid -cf $CONFIGFILE -lf $LEASEFILE $OPTIONS $INTERFACES
PIDFile=/run/dhcpd/dhcpd.pid
User=isc-dhcpd
AmbientCapabilities=CAP_NET_BIND_SERVICE CAP_NET_RAW
ProtectSystem=full
ProtectHome=on
KillSignal=SIGINT
# We pull in network-online.target for a configured network connection.
# However this is not guaranteed to be the network connection our
# networks are configured for. So try to restart on failure with a delay
# of two seconds. Rate limiting kicks in after 12 seconds.
RestartSec=2s
Restart=on-failure
StartLimitInterval=12s

[Install]
WantedBy=multi-user.target