ImportantThis article contains information that shows you how to help lower security settings or how to turn off security features on a computer. You can make these changes to work around a specific problem. Before you make these changes, we recommend that you evaluate the risks that are associated with implementing this workaround in your particular environment. If you implement this workaround, take any appropriate additional steps to help protect the computer.
ProblemA federated user is repeatedly prompted for credentials when the user tries to authenticate to the Active Directory Federation Services (AD FS) service endpoint during sign-in to a Microsoft cloud service such as Office 365, Microsoft Azure, or Microsoft Intune. When the user cancels, the user receives the Access Denied error message. CauseThe symptom indicates an issue with Windows Integrated authentication with AD FS. This issue can occur if one or more of the following conditions are true:.An incorrect user name or password was used.Internet Information Services (IIS) authentication settings are set up incorrectly in AD FS.The service principal name (SPN) that's associated with the service account that's used to run the AD FS federation server farm is lost or corrupted.
NoteThis occurs only when AD FS is implemented as a federation server farm and not implemented in a stand-alone configuration.One or more of the following are identified by Extended Protection for Authentication as a source of a man-in-the-middle attack:. Some third-party Internet browsers. The corporate network firewall, network load balancer, or other networking device is publishing the AD FS Federation Service to the Internet in such a way that IP payload data may potentially be rewritten. NoteTry this resolution only when AD FS is implemented as a federation server farm. Do not try this resolution in an AD FS stand-alone configuration.To resolve the issue if the SPN for the AD FS service is lost or corrupted on the AD FS service account, follow these steps on one server in the AD FS federation server farm:.Open the Services management snap-in. To do this, click Start, click All Programs, click Administrative Tools, and then click Services.Double-click AD FS (2.0) Windows Service.On the Log On tab, note the service account that's displayed in This Account.Click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.Type the following command, and then press Enter. SetSPN –f –q host/.
An unauthorized user is a network Security issue. The network support layers are Physical layer, Data link layer and Network layer. In telecommunication and computer science, serial communication is the process of. An unauthorized user is a network issue. A) Security B) Reliability C) Performance D) All the above.
NoteIn this command, represents the fully qualified domain name (FQDN) service name of the AD FS service endpoint. It does not represent the Windows host name of the AD FS server.If more than one entry is returned for the command, and the result is associated with a user account other than the one that was noted in step 3, remove that association. To do this, run the following command: SetSPN –d host/.If more than one entry is returned for the command, and the SPN uses the same name as the computer name of the AD FS server in Windows, the federation endpoint name for AD FS is incorrect. AD FS has to be implemented again.
The FQDN of the AD FS federation server farm must not be identical to the Windows host name of an existing server.If the SPN does not already exist, run the following command: SetSPN –a host/. NoteWhen this workaround is applied for third-party application functionality, you should also uninstall hotfixes on the client operating system for Extended Protection for Authentication. For passive clientsTo disable Extended Protection for Authentication for passive clients, perform the following procedure for the following IIS virtual applications on all servers in the AD FS federation server farm:. Default Web Site/adfs. Default Web Site/adfs/lsTo do this, follow these steps:.
Open IIS Manager and navigate to the level that you want to manage. NoteWindows client operating systems must have specific updates that are installed to effectively use Extended Protection features.
That box is probably checked by default, in fairness.You have two choices, though. What I would do is this: Leave the alert on and then you'll get a heads-up any time someone is scanning your network with SNMP, which isn't a bad thing to know. Adjust the network scan range in Spiceworks to exclude the IP addresses of APC NMC's.The other option is to turn off that alert on the NMC.Certain hardware devices may have a software utility that scans for the device using SNMP. I think that's what my L1 was running when my alerts blew up. Think something like Axis camera detection utility, you plug it into the network and run the tool, it scans your entire network based off IP and subnet mask via SNMP and reports back the cameras IP address.
Limey wrote:That box is probably checked by default, in fairness.You have two choices, though. What I would do is this: Leave the alert on and then you'll get a heads-up any time someone is scanning your network with SNMP, which isn't a bad thing to know. Adjust the network scan range in Spiceworks to exclude the IP addresses of APC NMC's.The other option is to turn off that alert on the NMC.Certain hardware devices may have a software utility that scans for the device using SNMP. I think that's what my L1 was running when my alerts blew up. Think something like Axis camera detection utility, you plug it into the network and run the tool, it scans your entire network based off IP and subnet mask via SNMP and reports back the cameras IP address.If I remember correctly the email alert should include the IP address that is 'unauthorized,' so you should be able to track down which machine it is - unless you already know.