Nps reason code 21 Details: System; Provider [ Name] Microsoft-Windows-Security-Auditing [ Guid] {54849625-5478-4994-A5BA-3E3B0328C30D} EventID 6273 Version 2 Level 0 Task 12552 Opcode 0 Keywords 0x8010000000000000 This one, wow what a pain in the a***** It took me hours to finally debug this issue. The NPS Server shows the following error: Reason Code: 21. However, NPS Reason Code 36 indicates that the account in the log message has been locked out. Accounting information was written to the local log file. Reason Code: 7 Reason: The specified domain does not exist. Reason code 16 doesn’t get me any closer to find out if it’s a certificate issue or something else. 1 Server Name SP-V-NPS Server NasPort 0 Start DateTime 02/21/2022 08:47:49 Stop DateTime 02/21/2022 08:47:53 Terminate Cause The supplied Reject packet type 3, reason code 16; I could probably clean up the logs a little more by disabling the workstation policy, but I’m pretty confident I would be left with line 3 & 4 above. Reason code below: Reason Code: 21. Initial thought was the cert but the cert being used is not a wildcard. Mark as New; Bookmark; Subscribe; Mute; Subscribe to RSS Feed; Permalink; Print; Report Inappropriate Content 11-15-2021 07:14 AM. Reason Code: 66 Reason: The user attempted to use an authentication method that is not enabled on the matching network policy. 093+00:00. Reason: An NPS extension dynamic link library (DLL) that is installed on the NPS server rejected the connection request. 1: Application and Services Logs\Microsoft\AzureMfa\AuthZ I want to authenticate one ssid with a ms nps (server 2012r2) against our active directory. Looking at the Security event log on the NPS server, administrators will find a corresponding event ID 6273 in the Network This all works well if the NPS server and client computer account are in the same domain. At my office we use a Cisco WLC2504 wireless controller and starting about a week ago we started having problems with users connecting to one of our secure wireless network. what is the problem? Thanks Error: “An NPS extension dynamic link library (DLL) that is installed on the NPS server rejected the connection request. We have Cisco wireless controllers which use RADIUS and point to our Network Policy Server (NPS). 2021-06-01T14:32:20. We're baffled because we're not aware of any changes that have been made. The weird thing is that I don't know where the NPS server is getting 000c29fcbf0f from , as that doesn't exist anywhere and certainly isn't apart of any certs etc that have been issued to the computer. We use the Azure MFA extension on our Reason Code: 21 Reason: An NPS extension dynamic link library (DLL) that is installed on the NPS server rejected the connection request. 1 client, a WS2012r2 Domain controller and a WS2012r2 DHCP and NPS server. Note: NPS has the correct signed cert from the same PKI as the user, no wildcard cert in use, I pretty sure certs are fine in the user and the NPS side, VPN MFA using ASA, NPS server extension and Azure AD Michael Proctor. In short, it typically means that NPS could Radius Issue NPS - Event:6273 Reason Code:16 - Windows PCs won't connect . Reply reply Dial-In tab have you set the option “ Control access through NPS policy” ? YES, this is configured. Especially during setup of a new SSID, you'll see accounts fail authentication when you are sure the account credentials are correct - in that case check your policy, quite often the NPS Policy will be based on AD groups, but either the user or the machine will need to be in when configuring the FortiSwitch as RADIUS Client a log is generated in the NPS with access denied. In the NPS configuration, I have configured the AP and Unifi Controller as clients. <Event> When I attempt to log in to Amazon Workspaces the NPS logs are showing event ID 6273. Reason Code: 65 Reason: The Wireless gpo is setup as well nps policies. We use the Azure MFA extension on our Windows NPS servers and we have a user that is Reason Code: 21 Reason: An NPS extension dynamic link library (DLL) that is installed on the NPS server rejected the connection request. All of them are part of the domain called dkaro. Has anyone got this to work with a Firepower 2110? I have the extension installed and NPS setup but don't even get a prompt when I Reason Code: 9. When configuring Always On VPN to use PEAP with client authentication certificates, administrators may encounter a scenario in which a user has a valid certificate. The RADIUS_REJECT_REASON_CODE enumeration defines the possible RADIUS packet reject codes. starting with Windows Server 2008. domain. The RADIUS_REJECT_REASON_CODE enumeration defines the possible RADIUS packet reject Hello, after installing the latest patch tuesday (May 2022) updates and restarting the servers the domain computers (Win 10) are not able to join to company's local network via ethernet or Wifi anymore. When I attempt to authenticate it says cannot join, however in the logs says the reason code is 0 which I understand as successful. Contact the Network Policy Server administrator for more information. 10. jordack2 (Jordack) I'm using Ubiquiti APs pointed to a Windows NPS server for RADIUS. And I have NPS Extension for MFA installed on the separate server as per the documentation. My AP’s are Ubiquiti Unifi, and my Unifi controller is located in AWS. 0 votes Report a concern Sign in to comment I’ve been working on setting up a RADIUS server on Windows Server 2016 with NPS as the authentication source. steveadams6 (steveadams6) August 18, 2016, 1:08pm 8. 1X Authentication NPS Reason Code 293. Reason: The specified user account does not exist. CRL paths have been verified. Question We set up Radius (NPS) about a year and a half ago on Windows Server 2012 and it's been running fine until now. The enviroment: 1 Hyper-V host with 4 guests on a private hyper-v switch. " Why would this happen if using certificates? NPS server is configured with an active certificate that is a template copy of RAS and IAS servers. Firewall. I use it to authenticate into my Cisco C9300 switches as an administrator to work on them. I am having errors in Windows NPS (Windows 2016) with reason code 21 "An NPS extension dynamic link library (DLL) that is installed on the NPS server rejected the connection request". Recently security policies have changed and I am unable to login as it says I am not authenticated. I've sanitized the username and server names Reason Code: 22 Reason: The client could not be authenticated because the Extensible Authentication Protocol (EAP) Type cannot be processed by the server. What is Error: NPS Reason Code 22? NPS Reason Code 22 is one of the common issues users face when using the Extensible Authentication Protocol (EAP) type on the client’s computer. This is a follow-up to that, some additional troubleshooting for the NPS configuration. NPS extension only performs secondary authentication for Radius Requests Reason Code: 16 Reason: Authentication failed due to a user credentials mismatch. Certificate-based authentication methods When you use EAP with a strong EAP type (such as TLS with smart cards or certificates) both the client and the Authentication Server: NPS. NPS works as ACLs, it will go from top through bottom and stop on first match. NPS Event ID 6273 with Reason Code 8 - NPS Event ID 6273 with Reason Code 8. Reason code below: Reason Code: 21 Reason: An NPS extension dynamic link library (DLL) that is installed on the NPS server rejected the connection request. If you put all into 1 entry, you don't really know where it blocks or why, I suggest doing one policy for In my previous blog, I detailed the process of how a Network Policy Server (NPS) is used to integrate with an Azure VPN gateway using RADIUS to provide Multi-Factor Authentication (Azure MFA) for point-to-site connections to your Azure environment. Top 10 Windows Security Events to Monitor. I am new at this job and had a one day handoff with the person I replaced and have never needed to troubleshoot a radius setup on an NPS. When I attempt to log in to Amazon Workspaces the NPS logs are showing event ID 6273. The content of this topic applies to both IAS and NPS. Here is a copy of the NPS log I get when I try to SSH into the switch. 047+00:00. I want to allow my Cisco telephones 802. Skip to main content. User: Security ID: NULL SID Reason Code: 49 Reason: The RADIUS request did not match any configured connection request policy (CRP). This causes the computer accounts in all subdomains to fail to authenticate with reason code 16, with events 4625 and 6273 to be 802. I set up the dhcp server and its work fine without NAP. Had setup NPS on a Windows 2019 server, like many times before, registered it in the Active Directory, and installed the Use Azure AD Multi-Factor Authentication with NPS – Azure Active Directory | Microsoft Docs” plugin, setup the policies in NPS and all good, then I setup my Reason Code 16. In event viewer on the NPS server I can see that NPS is receiving the request and rejects the Hi all, We have setup 802. Which means it was successfully authenticated! but on the network adaptor details when it try’s to connect it shows “authentication failed”. When using EAP-MSCHAPv2 , i'd expect to be given a prompt to enter a username The NPS extension is a joke and the reason I still recommend Duo’s integration when possible. How can I find why it was rejected? 21: An IAS extension dynamic link library (DLL) that is installed on the NPS server rejected the connection request. I disabled the ‘use windows authentication for all users’ policy and now the event log just has a blank value instead of my enabled’Sophos UTM Authentication Type: %21 EAP Type: %22 Account Session Identifier: %23 Logging Results: %26 Reason Code: %24 Reason: %25. NPS Reason Codes 0 Through 37. It is signed by the AD CA. . A reboot solves it for about 12 hours or so. 1x implementation. 1 Spice up. But all of a sudden, we are having an issue where Windows devices will not authenticate with our After posting I noticed the connection policy being used. Reason: The request was discarded by a third-party extension DLL file. 2 win8. This blog describes Network Policy Server (NPS) service authentication methods when certificate is used with 802. Either the user name provided does not map to an existing user account or the password was incorrect. Level 1 Options. Hi! I am trying to get NPS work in a test enviroment but i couldn’t get it. 51. I have two policies. It can’t even do one time code verification from the app or a token. 22: The client could not be authenticated because the EAP type cannot be processed by the server. This browser is no longer supported. Free Tool for Windows Event Reason Code 16. 1X access via EAP-TLS using MIC Certificates. 1X with a NPS server using computer certificates. I am having errors in Windows NPS (Windows 2016) with reason code 21 "An NPS extension dynamic link library (DLL) that is installed on the NPS server rejected the connection request". Either the user name Greetings, I am running an NPS Server on my Windows Server 2019 of my network. Looking at the logs on the NPS the pattern seems to be the wireless connection fails when the computer tries to authenticate and is successful when the user tries to authenticate. Reason Code: 16 Reason: Authentication failed due to a user credentials mismatch. Network Reason Code: 8. Both connection methods are using NPS with EAP The authentication request is hitting the correct connect request but failing with Reason Code 8 - "The specified user account does not exist. I recommend trying the troubleshooting MFA NPS extension article and also checking the NPS Health ScripAzure-MFA-NPS-Extension-648de6bbt. nl Authentication Type: PEAP EAP Type: - Account Session Identifier: "edited" Logging Results: Accounting information was written to the local log file. If configured it similar as MikeLascha stated in his post: 2021-06-02T02:42:21. But NPS not seems to forwarding the AUTH request to the Azure and timing Reason Code: 21 Reason: An NPS extension dynamic link library (DLL) that is installed on the NPS server rejected the connection request. hmmmm it would appear i’m getting reason-code 0. 2012r2. User: Reason Code: %25 Reason: %26. (NPS) server when attempting to connect remotely. ” Resolution:- Reinstall Azure MFA extension, potentially caused by incorrect TenantID entered during installation. When the test machine is reboot it fails with People have been asking how NPS authentication actually works with certificates. Suddenly users can’t connect and events 6273 are logged in the event viewer. In our scenario, however, the NPS server is in the root domain of the forest, and the client computer account is in a subdomain. Yet, their authentication request is rejected by the Network Policy Server (NPS) server when attempting to connect remotely. I have issued a workstation cert to a test machine and it is present in the local computer store. so maybe recheck the account and settings (or have 2nd set of eyes confirm them) you’ve gone over it so many times and know what you want to see, but maybe you’re not recognizing that “one” mis-setting - this is just a suggestion [ had a boss going over a copy/back up problem for You will want to look at the reason codes. Idk how this isn’t native in Windows Server platforms or in others looking to hook into Azure AD/on-premises AD. Network Policy Server denied access to a user. Connect Result Rejected Duration 0:00:03 FQ User Name DOMAIN\EXM-55WBB82$ NP Policy Name SP-WiFi - VLAN 150 Certificate Based Authentication (Student 1:1) Record Count 28 Server IP 10. Hi, We need to trace network monitor to find some clues. techthis2 1 Reputation point. ggvmej gspcht ezlya lcwvsvp acl vsfq admzah ott xpp auiyg