High Court of Australia

Difficulty of controlling access: The nature of the Web makes it impossible to ensure with complete effectiveness the isolation of any geographic area on the Earth's surface from access to a particular website. Visitors to a website automatically reveal their Internet Provider ("IP") address. This is a numerical code that identifies every computer that logs onto the Internet. The visitor may also disclose certain information about the type of browser and computer that the visitor uses. The IP addresses of users are generally assigned to them by an Internet Service Provider ("ISP"). The user's IP address will remain the same whenever and wherever the user "surfs" the Web. But some ISPs do not assign a permanent IP address. Instead, they assign a new IP address every time a user logs onto the Web. Because of these features, there is presently no effective way for a website operator to determine, in every case, the geographic origin of the Internet user seeking access to the website.