Network Policy Server windows 7 non domain wireless clients could not connect (Event id 6273 reason code 265)

Hi,
We have successfully configured network policy server on windows server 2012 and all wireless clients could connect to our network except windows 7 and xp non domain clients.The clients that are successfully authenticated includes windows 8,mobile users
(andriod + iOS) domain as well as non domain clients.If we join windows 7 pc to the domain it successfully connects but non domain clients could not connect.We have large number of windows 7 users that have their own laptop machines and we dont want
each laptop to join the domain.
On server event 6273 generated with reason code 265 "The certificate chain was issued by an authority that is not trusted".Plz help how to resolve this issue.I have searched on the internet but no proper solution found.

Hi,
According to the error message, it seems that you used certificate-based authentication methods and the non-domain computers has no Trusted Root Certificate for the CA that enrolled the certificate for the NPS.
For more detailed information, please refer to the links below:
Certificates and NPS
Manage Trusted Root Certificates
Best regards,
Susie
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<Data Name="EAPType">Microsoft: Secured password (EAP-MSCHAP v2)</Data>
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<Data Name="ReasonCode">7</Data>
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</EventData>
</Event>

Yes I did see that article, and there are plenty of logs from another device that authenticates via
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     23 4.600887    10.NPS_Server         10.switch             IPv4     1518                     Fragmented IP protocol (proto=UDP 17, off=0, ID=07db)
     24 4.609920    JuniperN_xx:xx:xx     Universa_xx:xx:xx     TLSv1    1514                     Server Hello, Certificate, Certificate Request, Server Hello Done
     25 4.610516    Universa_xx:xx:xx     Nearest               EAP      60                       Response, Protected EAP (EAP-PEAP)
     26 4.617407    10.switch             10.NPS_Server         RADIUS   262                      Access-Request(1) (id=254, l=216)
     27 4.618352    10.NPS_Server         10.switch             RADIUS   288    0.000945000       Access-Challenge(11) (id=254, l=242)
     28 4.623650    JuniperN_xx:xx:xx     Universa_xx:xx:xx     TLSv1    176                      Server Hello, Certificate, Certificate Request, Server Hello Done
     29 4.643316    Universa_xx:xx:xx     Nearest               TLSv1    361                      Certificate, Client Key Exchange, Change Cipher Spec, Encrypted Handshake Message
     30 4.649607    10.switch             10.NPS_Server         RADIUS   601                      Access-Request(1) (id=255, l=555)
     31 4.656950    10.NPS_Server         10.switch             RADIUS   199    0.007343000       Access-Challenge(11) (id=255, l=153)
     32 4.662734    JuniperN_xx:xx:xx     Universa_xx:xx:xx     TLSv1    87                       Change Cipher Spec, Encrypted Handshake Message
     33 4.681106    Universa_xx:xx:xx     Nearest               EAP      60                       Response, Protected EAP (EAP-PEAP)
     34 4.788536    10.switch             10.NPS_Server         RADIUS   262                      Access-Request(1) (id=2, l=216)
     35 4.789735    10.NPS_Server         10.switch             RADIUS   173    0.001199000       Access-Challenge(11) (id=2, l=127)
     36 4.795723    JuniperN_xx:xx:xx     Universa_xx:xx:xx     TLSv1    61                       Application Data
     37 4.796372    Universa_xx:xx:xx     Nearest               TLSv1    93                       Application Data
     38 4.802368    10.switch             10.NPS_Server         RADIUS   331                      Access-Request(1) (id=3, l=285)
     39 4.803363    10.NPS_Server         10.switch             RADIUS   189    0.000995000       Access-Challenge(11) (id=3, l=143)
     40 4.808905    JuniperN_xx:xx:xx     Universa_xx:xx:xx     TLSv1    77                       Application Data
     41 4.809501    Universa_xx:xx:xx     Nearest               TLSv1    77                       Application Data
     42 4.817342    10.switch             10.NPS_Server         RADIUS   315                      Access-Request(1) (id=4, l=269)
     43 4.822986    10.NPS_Server         10.switch             RADIUS   189    0.005644000       Access-Challenge(11) (id=4, l=143)
     44 4.828973    JuniperN_xx:xx:xx     Universa_xx:xx:xx     TLSv1    77                       Application Data
     45 4.833318    Universa_xx:xx:xx     Nearest               TLSv1    829                      Application Data
     46 4.840610    10.switch             10.NPS_Server         RADIUS   1073                     Access-Request(1) (id=5, l=1027)
     47 4.845946    10.NPS_Server         10.switch             RADIUS   189    0.005336000       Access-Challenge(11) (id=5, l=143)
     48 4.850938    JuniperN_xx:xx:xx     Universa_xx:xx:xx     TLSv1    77                       Application Data
     49 4.907924    Universa_xx:xx:xx     Nearest               TLSv1    141                      Application Data
     50 4.913390    10.switch             10.NPS_Server         RADIUS   379                      Access-Request(1) (id=6, l=333)
     51 4.917535    10.NPS_Server         10.switch             RADIUS   221    0.004145000       Access-Challenge(11) (id=6, l=175)
     52 4.922877    JuniperN_xx:xx:xx     Universa_xx:xx:xx     TLSv1    109                      Application Data
     53 4.923472    Universa_xx:xx:xx     Nearest               TLSv1    61                       Application Data
     54 4.930319    10.switch             10.NPS_Server         RADIUS   299                      Access-Request(1) (id=7, l=253)
     55 4.937348    10.NPS_Server         10.switch             RADIUS   381    0.007029000       Access-Challenge(11) (id=7, l=335)
     56 4.942543    JuniperN_xx:xx:xx     Universa_xx:xx:xx     TLSv1    269                      Application Data
     57 4.944791    Universa_xx:xx:xx     Nearest               TLSv1    125                      Application Data
     58 4.951408    10.switch             10.NPS_Server         RADIUS   363                      Access-Request(1) (id=8, l=317)
     59 4.954022    10.NPS_Server         10.switch             RADIUS   355    0.002614000       Access-Accept(2) (id=8, l=309)
     60 4.981482    JuniperN_xx:xx:xx     Universa_xx:xx:xx     EAP      60                       Success
     61 32.590347   10.switch             10.NPS_Server         RADIUS   361                      Access-Request(1) (id=251, l=315)
     62 62.592420   10.switch             10.NPS_Server         RADIUS   361                      Access-Request(1) (id=251, l=315)
     63 92.595043   10.switch             10.NPS_Backup_Server RADIUS   361                      Access-Request(1) (id=9, l=315)
     64 122.597856 10.switch             10.NPS_Backup_Server RADIUS   361                      Access-Request(1) (id=9, l=315)
     65 152.600618 10.switch             10.NPS_Backup_Server RADIUS   361                      Access-Request(1) (id=9, l=315)

A belated thanks for your reply.
Our environment doesn't have NPS accounting configured so that was easy to rule out.
The mid-day drop outs have stopped after I added "set protocols dot1x authenticator no-mac-table-binding" to our Juniper switches (which prevents mac address aging from clearing the active dot1x client session).
I believe the above error message occurs because the RADIUS session ID is rejected / ignored because of some quirks in the RADIUS standard. At the start of a dot1x authentication request a RADIUS session ID is created. For whatever reason the
RADIUS/NAP server stops responding and the Juniper switch fails over to the backup RADIUS/NAP server configured. The session ID is kept (per RADIUS standard) but the backup RADIUS/NAP server doesn't know about the session, so this event: "Network
Policy Server discarded the request for a user." occurs.
It would be nice to see a clearer error message "Invalid RADIUS session" or similar.
There is a Microsoft guide on how to set up RADIUS/NAP servers in a highly available configuration - something to do with RADIUS proxy servers.
It would be even nicer to see some kind of RADIUS session synchronisation between NAP servers... if it doesn't already exist?
I am having the same exact issue you posted on here except I have Extreme Network switches. Some of my computers, various hardware, will randomly not authenticate during re-authentication. The switch says that it failed to contact the NPS server so then it
switches to my backup server. The client has a random time on how long it waits to authenticate so sometimes I end up having the disable/re-enable the port they are connected to so that the session is started again. I see that you basically removed the option
to force clients to re-authenticate Any downfall disabling that?. Any idea why the NPS server is no longer responding? Are you using Windows Server 2012?

How to do Server 2012 R2 Network Policy Server MAC Authentication without adding ad users?

I have a Network Policy Server running on Server 2012 R2. I have set it up to do certificate and PEAP authentication for our 802.1x wireless authentication
and that works great.
Now I want to add a policy to this server so I can also do MAC address authentication our unauthenticated open wireless ssid so i can assign roles based on the
mac address. I got our Aruba controller setup to send the mac address to the radius server, but the radius server just denies access because I am not sure how to get it to use themsNPCallingStationID attribute.
I have found several ways do to this included adding active directory users for every single MAC address with the mac address as the username and password. I
do not want to do that. This is not an option.
I have also found several posts about using ieee802Device. I can't find a way to get that to work.
I also found a suggestion to use msNPCallingStationID ad attribute. I can easily set this for each user as their mac addresses but how do I configure the
NPS server to use this attribute to authenticate this?
If you have any other ideas on how to get MAC authentication to work, I would greatly appreciate it!
Thank you for your assistance!

Hi,
I think you may have some misunderstand about the MAC address Authorization, MAC address authorization is based on the MAC address of the network adapter installed in
the access client computer. Like ANI authorization, MAC address authorization uses the Calling-Station-ID attribute instead of user name and password or certificate-based credentials to identify the user during the connection attempt.
MAC address authorization is performed when the user does not type in any user name or password, and refuses to use any valid authentication method. In this case, Network
Policy Server (NPS) receives the Calling-Station-ID attribute, and no user name and password. To support MAC address authorization, Active Directory Domain Services (AD DS) must have user accounts that contain MAC addresses as user names, therefore you need
add the MAC address as the computer user name and password,
To use the MAC address as user name and password is Cisco® switch require condition, about your switch device please ask your hardware vendor.
If you want to combine the MAC address MAC filtering and
EAP Authentication, you can refer the following related article:
Enhance your 802.1x deployment security with MAC filtering
http://blogs.technet.com/b/nap/archive/2006/09/08/454705.aspx
More information:
MAC Address Authorization
http://technet.microsoft.com/en-us/library/dd197535(v=ws.10).aspx
Authorization by User and Group
http://technet.microsoft.com/en-us/library/dd197615(v=ws.10).aspx
The similar thread:
NPS: Override User-Name and User Identity Attribute
http://social.technet.microsoft.com/Forums/windowsserver/en-US/6dd983f9-973f-4d23-be0c-032d3a1592d0/nps-override-username-and-user-identity-attribute?forum=winserverNAP
The related third party article:
Configuring IEEE 802.1x Port-Based Authentication
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-2_25_see/configuration/guide/3550SCG/sw8021x.html#wp1170569
MAC Filters with Wireless LAN Controllers (WLCs) Configuration Example
http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wlan-security/91901-mac-filters-wlcs-config.html#backinfo
Hope this helps.

Forefront TMG network policy server and VPN issue.

Hello every one!
I have a problem with configuration VPN server on Forefront TMG on Windows Server 2008R2 with latests microsoft updates.
I install Forefront TMG on on Windows Server 2008R2 with latest updates.
Then, I configure startup wizard where I set network configuration and etc.
Next, I set VPN settings, I set DHCP pool, DNS servers, Access groups for VPN, and set PPTP.
After apply this settings, service RemoteAccess doesn't start. I try to reboot server but service doesn't start.
But it's not one problem.
When I add VPN Access groups in Forefront, and apply configuration, I don't see changes in network policy server (nps.msc) Groups don't add to policy in network policy server.
Screenshot
If I start RemoteAccess manually and add new VPN Access groups in policy in network policy server, I can use VPN server, and connect to forefront server.
But I don't understand why TMG Forefront can't apply this settings in nps.msc and services.
What I do wrong?
I Use Windows Server 2008R2
Forefront TMG RTM 7.0.7734.100

Hello! Thank you for your help!
I see this link
http://www.isaserver.org/articles-tutorials/configuration-security/Implementing-Secure-Remote-Access-PPTP-Forefront-Threat-Management-Gateway-TMG-2010-Part2.html
But I don't use RADIUS server in my Forefront TMG VPN configuration.
I configure client VPN Access via PPTP
When I configure TMG VPN settings, I set VPN Access groups. After that NPS server change and apply TMG network policy correctly.
But if I change some TMG firewall policy, and then I try to add VPN Access groups (screenshot -
http://i.gyazo.com/34a34ba18a01c58689e5e3cddbc52585.png) NPS server can't change and apply TMG network policy correctly.
Now I have a two Access groups in TMG VPN settings
http://i.gyazo.com/34a34ba18a01c58689e5e3cddbc52585.png
And I have a NPS server network policy with not correctly settings
http://i.gyazo.com/1dd973ca9cc2a228d54a53d88ca90009.png
Forefront can't change NPS server network policy. I don't undesrtand where problem.
I try to reinstall TMG on new machine, but problem
problem persists.

Network Policy Server windows 7 non domain wireless clients could not connect (Event id 6273 reason code 265)

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