Forms Authentication for multiple applications

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From: cab0san (cabosan_at_gmail.com)
Date: 02/11/05 

Date: 11 Feb 2005 12:54:27 -0800

I have several applications all on the same server. I would like them
to all use the same login page.

Example:
http://server1/customers/app1.aspx
http://server1/suppliers/byregion/app2.aspx

I have a login page located in the root of the same server:
http://server1/login.aspx

None of these are virtual directories.

The web.config file for customers/ and suppliers/byregion/ looks like
this:

<authentication mode="Forms">
 <forms loginUrl="/login.aspx" name=".ASPXAUTH" timeout="30" path="/"
protection="All">
 </forms>
</authentication>
<authorization>
<deny users="?" />
<allow users="*" />
</authorization>

The web.config for the root web looks like this
<authentication mode="Forms">
 <forms loginUrl="login.aspx" name=".ASPXAUTH" timeout="30" path="/"
protection="All">
 </forms>
</authentication>
<authorization>
<deny users="?" />
<allow users="*" />
</authorization>

Both apps are configured to allow anonymous in iis.

The login page code looks like this:

Dim tkt As FormsAuthenticationTicket
tkt = New FormsAuthenticationTicket(1, Me.txtUser.Text, DateTime.Now(),
DateTime.Now.AddMinutes(30), True, "<group info would go here>")
Dim cookiestr As String
cookiestr = FormsAuthentication.Encrypt(tkt)
Dim ck As HttpCookie
ck = New HttpCookie(".ASPXAUTH", cookiestr)
ck.Expires = tkt.Expiration
ck.Path = "/"
Response.Cookies.Add(ck)
Dim strRedirect As String
strRedirect = Request("ReturnURL")
Response.Redirect(strRedirect)

When I request a page in customers, like
http://server1/customers/app1.aspx, I am redirected to the login page
(good), bet when I click logon and run the above code, it just returns
to the login page again (bad).
The "ReturnURL" is correct, as I have seen in debug mode.

I'm guessing that app1 is rejecting my cookie, and returning me to the
login page again, but why?

I must be missing something simple. Any ideas?

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