My company has a web application hosted on a client\'s machine that uses forms authentication in ASP.net. When visiting the website http://www.client.com/Application and tr
As John said it was something environmental. We turned on cookieless authentication and that worked just fine so users were being authenticated correctly. One of our customers discovered that when they used just the IP address to access the website (e.g. http://111.111.111.111) that the website behaved properly and they were able to get past the login page but when they used the DNS name it did not. Turned out their zones in internet explorer did allow enough trust to outside sites (which the DNS name resolved too) as it did local intranet sites to have cookies.