Due to functional extensions not all settings are supported in all Open Wrt releases.
Since I don't have a static IP I am trying to use DDNS.
For that, I've registered a free domain(net) with Noip.com, it binds my external IP (101.50x) with the domain name.
The software utility then periodically checks for a change to the computer's IP address, and when a new IP address is discovered, it updates the Dynamic DNS database to reflect that change.
DNS requires that a name server somewhere on the Internet keep track of 'where you are' (i.e. That is, its database must always be updated to make sure your hostname always corresponds to your current IP address.