Client requests to access a published Web site are blocked when you configure ISA Server 2006 to use pass-through authentication to access a published
Este error puede darse cuando tenemos ISA Server 2004 y luego se realiza la migracion a ISA Server 2006. Aparece el error al intentar conectarse al sitio web bloqueandose los accesos por seguridad. Error Code: 403 Forbidden. ISA Server is configured to block HTTP requests that require authentication. (12250) Solucion: 1. Click Start, point to All Programs, point to Microsoft ISA Server, and then click ISA Server Management. 2. Right-click the Web site publishing rule that you want to change, and then click Properties. 3. Click the Listener tab, click Properties, click the Authentication tab, and then click Advanced. 4. Under Client Configuration Settings, click to select the Allow client authentication over HTTP check box. 5. Click OK to close Advanced Authentication Options. 6. Click OK two times.