Running any server on Raspberry will require a Dynamic DNS if you are having it on your home Internet connection or somewhere with dynamic IP address allocation from ISP.

sudo apt-get install ddclient

will get you the little app you need and you can edit

/etc/ddclient.conf

to get the required results. Consult your DNS hosting for information to go in this file. For NameCheap which I use the information is:

use=web, web=dynamicdns.park-your-domain.com/getip
protocol=namecheap
server=dynamicdns.park-your-domain.com
login=yourdomain.com
password=password
subdomain

Do not change the top three lines. In ‘login=’ line, you need to enter your domain name, password should be obtained from NameCheap DNS hosting interface and is NOT your NameCheap account password. Finally the subdomain is whatever A or CName you are updating.

You can test with the following snippet that its working and checking your ‘syslog’ file in /var/logs

sudo /usr/sbin/ddclient -daemon 300 -syslog

Now you would want the ddclient to run as daemon on startup so run this one line to have it added to your startup scripts.

sudo update-rc.d ddclient defaults