mrprompt/gist:65fbdd2135a2c5b2bebbfd2e9ffef69b

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    Automatic update configuration for dyndns

Get dynamic DNS account

DLink offers free dyn.com dynamic DNS accounts for any user for a single hostname on dlinkddns.com domain (it's still possible to get a similar account directly from dyn, but more complex). Create the account and the host on https://www.dlinkddns.com/login.
Hostname : xxxxx.dlinkddns.com
username : dlinkusername
password ! dlinkpassword
Download ddclient

Recommended Linux dyn.com client id ddclient on http://sourceforge.net/p/ddclient/wiki/Home/
 wget http://cdn.dyndns.com/ddclient.tar.gz
 tar -xvf ddclient.tar.gz
 cd ddclient-3.7.3/
Installation

sudo cp ddclient /usr/sbin/
sudo mkdir /etc/ddclient
sudo cp sample-etc_ddclient.conf /etc/ddclient/ddclient.conf
Edit configuration (see below)
sudo nano /etc/ddclient/ddclient.conf 
Test the client manually and check the address is updated on dlinkddns.com
sudo /usr/sbin/ddclient
Install as a service (missing LSB warning can be ignored...)
sudo cp sample-etc_rc.d_init.d_ddclient.ubuntu /etc/init.d/ddclient
sudo update-rc.d ddclient defaults
Update the startup file to add verbose logging to syslog
sudo nano /etc/init.d/ddclient
Change the start line
start-stop-daemon -S -q -p $PIDFILE -x $DDCLIENT -- $DELAY
To
start-stop-daemon -S -q -p $PIDFILE -x $DDCLIENT -- $DELAY -verbose -syslog
Start the first time by hand
sudo service ddclient start
Check the ddclient process is running and the update was done in the log
tail /var/log/syslog
Feb nn nn:07:52 name ddclient[6251]: RECEIVE:  <html><head><title>Current IP C
heck</title></head><body>Current IP Address: nn.nn.nn.nn</body></html>#015
Feb nn nn:07:52 name ddclient[6251]: SUCCESS:  xxxxxxx.dlinkddns.com: skipped:
 IP address was already set to nn.nn.nn.nn.

Configuration

Content of etc/ddclient/ddclient.conf.

deamon is the refresh rate 600 = every 5mn
login and password need to be changed to the dlinkddns site accoutn created previously
the last line contains the host address created at dlinkddns

daemon=600
cache=/tmp/ddclient.cache
pid=/var/run/ddclient.pid
use=web, web=checkip.dyndns.com/, web-skip='IP Address'
login=dlinkusername
password=dlinkpassword
protocol=dyndns2
server=members.dyndns.org xxxxxxxx.dlinkddns.com