First i have to say that since i set these settings on xbox 360(i think the one has the same) i have no NAT Problems or any other countless Errors. I dont know why but i cant find any Information about this setting in this forum or on Microsoft Support. All what i have done is Settings --> Network --> Additional Settings--> PPPoE Settings--> set the telephonenumber as User Name and the password i get from my provider 2 weeks of playing and i get only one time an anteater error