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Troubleshooting LDAP over TLS integration with SonicWall

12/20/2019 118 People found this article helpful 147,650 Views

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    Description

    The following error messages are addressed in this article.

    • Problem contacting LDAP server.
    • Credentials not valid at LDAP server. or Credentials not valid at LDAP server - 80090308: LdapErr: DSID-0C090334, comment: AcceptSecurityContext error, data 525, vece-
    • LDAP Authentication failed.
    • Bad LDAP server certificate - TLS fatal: unknown CA

    Resolution

    NOTE: More error messages and solutions related to LDAP integration can be found at the below link: http://support.microsoft.com/kb/823659.

    Problem contacting LDAP server
    Image

    Cause of the error
     
    This error may appear if the DNS settings are not configured properly and the SonicWall is unable to access the LDAP server. We need to make sure that the DNS name resolution works correctly on the SonicWall.
     
    Possible Solution:1

    1. In the SonicWall, specify the IP address of the local DNS server as the DNS server 1.
    2. Navigate to Network | DNS, click  Specify DNS manually and specify the IP address of the local DNS server as the DNS server 1 and the public DNS as DNS server 2.
    3. Click Apply on the top of the web page.

    NOTE:Your local DNS server should also forward the DNS requests to the Internet DNS servers. Check the forwarders settings in your local DNS server.

    Possible Solution:2

    1. Try to ping the domain name of your LDAP server.
    2. Navigate to System | Diagnostics | Ping | enter the domain name, click Go button. If the response is domain name is alive then it is confirmed that the DNS name resolution is working on the SonicWall.
    3. If there is no reply from the domain name, then ensure the pphysical connectivity /IP address / Subnet mask of the LDAP server is correct. Try to ping the IP address of the LDAP server.

      Image

    4. If you can ping the LDAP server, but are unable to connect to the LDAP server thru the LDAP configuration page then navigate to User Settings | Select ‘LDAP + Local Users’ and click  Configure button.

      Image

    5. Verify the parameters on the Settings tab.

      IP Address of the LDAP server
      Port number
      Login User Name / Password
      Use TLS (SSL) is enabled.
      Image

    6. We need to verify the configuration on the LDAP server side.
      Image

    7. Check the following security settings on the Domain Controller Security Settings in the Active Directory.

      Domain Member: Digitally encrypt secure channel data (when possible): Enabled
      Domain Member: Digitally sign secure channel data (when possible): Enabled
      Network Security: LDAP client signing requirement: Negotiate signing
      Domain Controller: LDAP Server signing requirement: None

    8. After making the above changes (if any), update the group policy by running gpupdate / force command.
      Image


    Credentials not valid at LDAP server.’ Or ‘Credentials not valid at LDAP server - 80090308: LdapErr: DSID-0C090334, comment: AcceptSecurityContext error, data 525, vece’

    Image

    Cause of the error:

    This error means that the LDAP process is failing on the initial bind.
     
    Possible Solution:

    1. Check the login credentials on the Settings tab.
    2. The Login user name must be the full name, and not the alias.

      EXAMPLE: Mustufa Kamaal Afghan and not mkafghan
      Image
      Image

    3. Make sure that the user object for the Login user name is in the container/OU specified as User tree for login to server on the directory tab.

      EXAMPLE: The Login user name Jane Doe is a user object in the AD tree ad.local/Users.

      TIP: Make sure there are no special characters in the password for the Login user name (especially a ! at the end).

     

    LDAP Authentication failed

     

    Cause of the error

    This issue may appear if the proper user name is not supplied for authentication
     
    Possible Solution

    • Make sure that you supply the user logon name that is configured in the Active Directory (LDAP server).
      Image
      Image


    BAD LDAP server certificate TLS error unknown CA

    Image

    Possible Solution

    • Please follow this KB article to resolve this error: UTM: Error: Bad LDAP server certificate - TLS fatal: unknown CA.

    Related Articles

    • DHCP server packet dropped, RPF check failed
    • How to Block Facebook Apps using Application Control
    • How to disable DPI-SSL Client and DPI-SSL Server as per access rule?

    Categories

    • Firewalls > NSa Series > User Login
    • Firewalls > NSv Series > User Login
    • Firewalls > TZ Series > User Login

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