for those who not have static IP should proceed in the manner suguinte;
1º install the FTP module, enable it
2º install the module for DNS.
3º
http://www.dyndns.com/ go to the website and create an account.
4º th go to the dyndns zentyal and field hablitar dynamic DNS.
in the "Service" select DynDNS
In field use must be in the administrator name
put a password required
In the name of the machine put in the domain that created dyndns.com
save the changes.
5 º open the doors of your router's FTP, see the manual.
At the
6º Filizilla, put the host in the field created by the domain
dyndns.com, the user name, put on the field user, and finally put
the password, and port 21 ..
I hope it will be useful if there is doubt make a video toturial.