Installing a DynDns

Dyn Dns (Dynamic DNS ) service allows you to alias a dynamic IP address to a static hostname, allowing your computer to be more easily accessed from various locations on the Internet
Here below you should find how to install Dyn Dns on Ubuntu/Linux
Installation

sudo apt-get install inadyn 

Configuration

Create the folder/etc/inadyn.conf: sudo gedit /etc/inadyn.conf

For DynDns.org

--username yourlogin
--password yourpassword
--dyndns_system dyndns@dyndns.org
--alias youralias.dyndns.org
--background

For DNS-O-Matic (OpenDNS)

--username yourlogin
--password yourpassword
--alias all.dnsomatic.com
--dyndns_server_name updates.dnsomatic.com
--dyndns_server_url /nic/update?
--background

Setting as default

modify the file/etc/rc.local and add the following line:
/usr/sbin/inadyn

Inadyn will be launch automatically after starting up your PC. It will verify whether there is any changes in the IP address . if there is any changes it will automatically send the new IP address to the specified service.

To monitor this procedure: grep INADYN /var/log/syslog

If you want to modify the time lap between the verification of the IP address add the following line /etc/inadyn.conf:

--update_period_sec 600

600 is equal to 600 secondes (10 minutes). You can modify this value.

Other DynDns client under Linux

ddclient, ez-ipupdate, ipcheck.