I am trying to access my home network over the internet. When I enter the public ip address I am asked to put in a password and user name. Is this my isp username and password or my router username and password or something completely different as I have tried both to no avail. My aim is to be able to access a network hard drive that I have attached to my network over the internet, which would be great to access files when I am away from home. Any advice very much appreciated.