Following the guide http://guides.macrumors.com/Using_Remote_File_Access_to_Save_Disk_Space_on_Your_MacBook_Air Trying to setup remote file sharing via internet connection to access my disk on the go. I can configure all of it up until this point... In the Public UDP Port(s) and Public TCP Port(s) boxes, type in a 4-digit port number (e.g., 5678) that you choose. In the Private IP Address box, type the internal IP address of your Time Capsule or AEBS that you wrote down in step 2 (for example, 192.168.0.1). In the Private UDP Port(s) and Private TCP Port(s) boxes, type 548. Click Continue. It is predefined as 10.0.1.xx where i can edit the last two digit. It will not allow my to delete and change to the internal ip any suggestions?