Automatic redirection of FormsAuthentication to other URL than specified in the Web.Config?

Question

I have this section in the Web.config for my MVC3 application:

<authentication mode="Forms">
  <forms loginUrl="~/Account/LogOn" timeout="20" slidingExpiration="true"/>
</authentication>

Until recently every time the code hit an [Authorize] attribute the LogOn.cshtml page was shown. All of a sudden the redirection takes place to Account/Login (not the 'i' instead of the 'O'!!!) and I get a resource not found exception. I did a Find on the Web.config and could not find the word 'login' anywhere! What on Earh can have gone wrong?

Have you checked the "extra" Web.configs in the View directory sub-tree? Does this happen on both debug and release builds? (different config templates).... Maybe do a "grep" for Login within your solution. — JcMaltaDev
– JcMaltaDev, Commented Aug 28, 2011 at 11:22
There is no reference to Account\Login to be found anywhere... — Dabblernl
– Dabblernl, Commented Aug 28, 2011 at 11:53

Darin Dimitrov · Accepted Answer · 2011-08-28 16:12:23Z

4

This is a known issue with ASP.NET MVC 3 as stated in the release notes. To solve it simply add the following to the <appSettings> node of your web.config:

<appSettings>
    <add key="loginUrl" value="~/Account/LogOn" />
<appSettings>

or try with the following key as suggested by the release notes:

<add key="autoFormsAuthentication" value="false" />

answered Aug 28, 2011 at 16:12

Darin Dimitrov

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2 Comments

Dabblernl Over a year ago

I have to correct that, after a time the problem recurred! I simply renamed the Action to be rid of this annoyance.

user1131926 Over a year ago

As suggested in the release notes you must use <add key="enableSimpleMembership" value="false" /> in conjunction with Darin's second suggestion.Known issues are at times annoying

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