To keep it very simple:
As long as you can connect the system to the internet, there is nothing to worry about.
ISP (Internet Service Providers) have control over this.
You -probably- have something called a "Dynamic IP" witch means that it changes often.
This is for security mainly.
for more comprehensive information about that.
Edited by S3cS3arch3r, 14 July 2012 - 05:29 AM.