DDCLIENT

ddclient.conf

###
# DDCLIENT : https://www.cloudflare.com/technical-resources/#ddclient
###

# /etc/ddclient/ddclient.conf
daemon=600				# check every 600 seconds
syslog=yes				# log update msgs to syslog
mail=root				# mail all msgs to root
mail-failure=root			# mail failed update msgs to root
pid=/var/run/ddclient.pid		# record PID in file.
ssl=yes					# use ssl-support.  Works with
use=web					# via web
protocol=cloudflare,        \
zone=deuxfleurs.fr,            \
server=www.cloudflare.com,  \
login=xxx@xxx.xx,     \
password=xxxxx             \
havelock.machine.deuxfleurs.fr

ddclient.service

# /etc/systemd/system/ddclient.service
[Unit]
Description=ddclient for cloudflare service

[Service]
ExecStart=/usr/sbin/ddclient -foreground 
Restart=always

[Install]
WantedBy=multi-user.target