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  • Hardik Gondalia 4 posts 96 karma points
    Jul 31, 2017 @ 06:49
    Hardik Gondalia
    0

    BackOffice Authentication Fails

    Hello,

    I am using UmbracoCMS 7.6.2 in one of my site.

    When I try to login in backoffice on \umbraco Page. I am getting following error:

    Login failed for user admin

    As, login for 'Admin' was working fine till today and suddenly stops working.

    I checked the console of the browser and getting following error:

    Failed to load resource: the server responded with a status of 400 (Bad Request) umbraco/backoffice/UmbracoApi/Authentication/PostLogin

    I check the log files and getting following error:

    Umbraco.Core.Security.BackOfficeSignInManager - Event Id: 0, state: Login attempt failed for username admin from IP address, the user is locked

  • Marc-at 2 posts 72 karma points
    Aug 04, 2017 @ 13:36
    Marc-at
    0

    I'm currently experiencing the same problem with 7.6.4 and have the same error messages (bad request on PostLogin).

    My team was working in the back-end all day without problems until the system kicked all authenticated users out and wouldn't let us log back in.

    The logs display this message:

    Umbraco.Core.Security.BackOfficeSignInManager - Event Id: 0, state: Login attempt failed for username marc@... from IP address ::1, the user is locked

    However the user is not locked at all when I look at the table row..

    I also tried falling back on the useLegacyEncoding="true" setting in the web.config but it did not help.

  • Dan Diplo 1554 posts 6205 karma points MVP 6x c-trib
    Aug 04, 2017 @ 13:51
    Dan Diplo
    0

    Not sure if it will help, but sometimes clearing all cookies or using an incognito session can help with this type of issue.

  • Ismail Mayat 4511 posts 10092 karma points MVP 2x admin c-trib
    Aug 04, 2017 @ 14:03
    Ismail Mayat
    0

    I have had this before as well after we turned on https force https with a forced redirect.

  • Sanjay 7 posts 27 karma points
    Jul 10, 2018 @ 11:00
    Sanjay
    0

    Hi - did anyone find an answer to this - ive got this issue with Umbraco version 7.10.4 assembly: 1.0.6684.15725.

    I cannot login as any user with the same line in the trace log below.

    • Umbraco.Core.Security.BackOfficeSignInManager - Event Id: 0, state: Login attempt failed for username

    In the chrome developer console i have.

    Failed to load resource: the server responded with a status of 400 (Bad Request)
    

    angular.min.js?cdv=1188174677:106 POST http://localhost/umbraco/backoffice/UmbracoApi/Authentication/PostLogin 400 (Bad Request)

  • Sanjay 7 posts 27 karma points
    Jul 10, 2018 @ 11:19
    Sanjay
    0

    I found my problem - i had added the following to the UsersMembershipProvider which caused an issue.

    allowManuallyChangingPassword="true"

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