To allow only the valid users to access the application wer can use the FORM AUTHENTICATION.

this is one of the method for the authentication you can also used the session based authentication for this.

In form authentication what all forms are allowed to view are kept in for the authenticated user

we have to use the web config for this

<authentication mode=”Forms”>
<forms name=”.ASPXFORMSDEMO” loginUrl=”logon.aspx”
protection=”All” path=”/” timeout=”30″ />
</authentication>

<authorization>
<deny users =”?” />
<allow users = “*” />
</authorization>

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