Authenticating a third party client system prior to providing Internet access via an Internet access point. In a distributed computing system including an Internet access point, an authentication service, and a third party client system, an authentication service receives an authorization request from a third party client system. The authorization request is initiated in response to a single action being performed by a user of the third party client system. The user is not required to manually submit any identification information. The authorization request includes a unique client identifier for identifying the third party client system. The method also includes verifying that the third party client system associated with the unique client identifier is authorized to access the Internet via the Internet access point. If the third party client system is authorized to access the Internet, Internet access is provided to the third party client system.