ISE 1.2 anomalous client suppression

Is there a way to clear a client who has been flagged as an anomalous client ? We are hesitent to modify or change any of the settings without fully understanding the potential impact, but would like to know if there is a way to manually reset a client so that they may retry authentication.

Hi Ageel,
Thanks for the response. The problem we are having is not related to a user, though. With the anomalous client supression enabled for the RADIUS protocol (Admin->System->Settings->Protocols->RADIUS) set to reject users who fail subsequent authorizations, the client is in "reject" mode for the determined amount of time configured which is a default of 60 minutes.
The problem we are facing is once the client is in reject mode we are unable to find a way to clear them from reject mode. If I were to look at a client on my ISE deployment who is experiencing this I would see an attribute for IsEndPointInRejectMode set to true.
Deleting the endpoint MAC address from the ISE database does not fix the issue - so it seems to cache it somewhere. We want to find a way to clear it.
Thanks.

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ISE 1.2 Anomalous Client Detection

Hi Community!
ISE 1.2 with patch 8,9.
On MAB authentication with redirection I have clients that are suppressed by the RADIUS setting mentioned in the title. I have seen this post where suppression can be disabled, the thing is that it's not working at all.
Testing I have donde this
1. Set the fields in Administration > System > Settings > Protocols > RADIUS to default values.
2. Retired MAC address from Endpoints in Administration > Identity Management > Identities > Endpoints.
3. Tried to connect with same device until 5434 Endpoint conducted several authentication attempts from same scenario error appears.
4. In the first test the attribute "IsEndpointInRejectMode" was set to true, added the MAC in Disable Suppression > Result NOT ALLOWED
5. In the second test the attribute "IsEndpointInRejectMode" was set to false, added the MAC in Disable Suppression > Result NOT ALLOWED
So none of these tests have been working at all.
Am I expecting something that cannot be achieved?
Why did it work before? Client states that after enabling dot1x it stopped working (We all know this is completely unrelated, unless bug)
Any thoughts?

Clients are being blocked even though suppression is disabled. The suppression is disabled via Collection Filters. One case I've seen is that if the MAC is not in the database (manually added) and the suppression enable via collection filters the endpoint no longer triggers the IsEndpointInRejectMode flag, so for me that means suppression is working.
Yes, retiring is deleting the endpoint from the database and for this particular client I have "disabled" profiling(I mean no RADIUS, DHCP or any checkboxes in deployment tab) .
I have not checked client exclusion in WLC but that would be a nice place to look next time.
It's difficult for me to post the screens at the moment, but basically is the same as when the 5434 error shows. One with the flag set to true (IsEndpointInRejectMode) and the other set to false.
For me it's something about timing and the way the client sees that this worked immediately before.

ISE 1.2.x Reporting Suppression: Good or Bad?

Hello,
I was wondering if most of you enable the ISE 1.2.x feature "Suppress Repeated Successful Authentications." (Administration/Settings/Protocols/Radius). At first blush this seems like a good thing as it cuts down the number of entries in the logs, but I'm finding that it creates problems due to lack of information for troubleshooting and reporting. I'm thinking I'll turn it off, but hoped for feedback from y'all first.
Thanks for any info re the pros/cons of this feature.
(BTW I DO like the "suppress anomalous clients" feature, I'm leaving that on.)

Hi Leroy-
I always turn the suppression off during:
1. The initial rollout of ISE
2. Testing and/or troubleshooting authentications
Other than that I always keep the suppression turned on. It can be a huge performance hit especially on large deployments (10,000+ endpoints)
Thank you for rating helpful posts!

Cisco ISE posture assesment and client provisioning

Hello,
I have Cisco ISE and Cisco IOS device. I have configured RADIUS in between these device.
Also I have configured RADIUSbetween Cisco ISE and Cisco ASA. Now I want to know that how to do posture assesment for these devices(Cisco ISE and Cisco ASA or Cisco ISE and Cisco IOS). Please give me whole steps to do posture assesment for cisco ios device in Cisco ise.
Also, please provide me logs related to posture assesment and client provisioning.
Thanks in advance.

You may go through the below listed link to download a PDF link
Posture assessment with ISE.
http://www.cisco.com/web/CZ/expo2012/pdf/T_SECA4_ISE_Posture_Gorgy_Acs.pdf
~BR
Jatin Katyal
**Do rate helpful posts**

Cisco ISE authentication failed because client reject certificate

Hi Experts,
I am a newbie in ISE and having problem in my first step in authentication. Please help.
I am trying to deploy a standalone Cisco ISE 1.1.2 with WLC using 802.1x authentication. The user authentication configured to be checked to ISE's internal user database for early deployment. But when the user try to authenticate, they failed with error message in ISE :
Authentication failed : 12321 PEAP failed SSL/TLS handshake because the client rejected the ISE local-certificate
I've generate a certificate for ISE using Windows Server CA and replace ISE's self-signed certificate with the new certificate but authentication still failed with the same error message. Must I generate a certificate for WLC also? Please help me in solving this problem.
Regards,
Ratna

Certificate-Based User Authentication via Supplicant Failing
Symptoms or
Issue
User authentication is failing on the client machine, and the user is receiving a
“RADIUS Access-Reject” form of message.
Conditions (This issue occurs with authentication protocols that require certificate validation.)
Possible Authentications report failure reasons:
• “Authentication failed: 11514 Unexpectedly received empty TLS message;
treating as a rejection by the client”
• “Authentication failed: 12153 EAP-FAST failed SSL/TLS handshake because
the client rejected the Cisco ISE local-certificate”
Click the magnifying glass icon from Authentications to display the following output
in the Authentication Report:
• 12305 Prepared EAP-Request with another PEAP challenge
• 11006 Returned RADIUS Access-Challenge
• 11001 Received RADIUS Access-Request
• 11018 RADIUS is reusing an existing session
• 12304 Extracted EAP-Response containing PEAP challenge-response
• 11514 Unexpectedly received empty TLS message; treating as a rejection by the
client
• 12512 Treat the unexpected TLS acknowledge message as a rejection from the
client
• 11504 Prepared EAP-Failure
• 11003 Returned RADIUS Access-Reject
• 11006 Returned RADIUS Access-Challenge
• 11001 Received RADIUS Access-Request
• 11018 RADIUS is re-using an existing session
• 12104 Extracted EAP-Response containing EAP-FAST challenge-response
• 12815 Extracted TLS Alert message
• 12153 EAP-FAST failed SSL/TLS handshake because the client rejected the
Cisco ISE local-certificate
• 11504 Prepared EAP-Failure
• 11003 Returned RADIUS Access-Reject
Note This is an indication that the client does not have or does not trust the Cisco
ISE certificates.
Possible Causes The supplicant or client machine is not accepting the certificate from Cisco ISE.
The client machine is configured to validate the server certificate, but is not
configured to trust the Cisco ISE certificate.
Resolution The client machine must accept the Cisco ISE certificate to enable authentication.

ISE Posture to guest clients

Hi Guys,
i'd like to know if is it possible to make a posture to Guest Clients using the Web Agent after they had been login into the portal.
thanks

Of Course it is possible. For detailed information please review the following guide
Configuring Client Posture Policies
http://www.cisco.com/en/US/docs/security/ise/1.1.1/user_guide/ise_client_prov.html
You can also create posture-specific authorization policies for all wired, wireless, and guest deployments by
specifying the Session:PostureStatus attribute in the authorization policies. This attribute has three
values, unknown, compliant, and noncompliant, which you can use n the authorization policies
Regards,
Ashok

ISE Profilinh and Thin Clients

I have ISE 1.2 and HP T610 thin client on the network
802.1x authorization is working correctly but clients are profiled as generic HP-devices or HP printers
I don't know how to create custom profiling policy for 'HP-Thin-Client' device.
What OUI conditions to assign for HP T610 clients?
Thanks in advance,
Vice

I have advanced license
Also I checked Feed Service, it is enabled but there is no updates listed under 'Update Information and Options'
I have configured external syslog server but I don't know which logging categories needs to be enabled to get syslog messages from Profiler Feed Service
Thanks in advance,
Vice
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ISE 1.2.1 - CLient certificate renewal and expiration

Hi all,
Anyone had any luck setting up and getting this functionality working? I have set up the correct authentication and authorisation flows and all works well. My major issue is that it would appear as though apple iOS devices do not allow you to update the profiles - meaning you have to delete the iOS profile which in essence means the entire renewal process is pointless.

Deleting the profile will just make the device appear as a brand new BYOD device which needs BYOD on-boarding. The process/experience should not be any different than when the device was first on-boarded. Thus, the user can delete the profile at anytime. Obviously there will be no access until the re-on-boarding happens but again that is not any different than when the device was setup originally. To answer your last question: It really depends on how you setup your policies but just because the device is registered it does not mean that it won't go through the on-boarding process. In addition, if your rules are setup in such way that the device must NOT be registered for on-boarding to succeed then the BYOD user(s) can use the My Devices portal to manually delete the iOS device from ISE without the need of admin intervention.

ISE guest self-registration Client Limitation per day

I deployed ISE with guest self registration on the Web Portal.
I want the guest (ex: AndroidPhone with Mac address: xx:xx) to be able to get 1 hour of internet access per day.
I know that using Time profile I can limit the guest to 1 hour of access, but how can I give the guest access each day.
Requirements:
--- I want to make this phone create only one account. ( How can I limit his mac address from creating new accounts when his account will expire in one hour)?
--- After 1 day, I want to give the same phone access (I dont mind if it is a new account or the same account as the day before)
How can we make this happen? Otherwise, everytime the account expires, the phone will be able to auto-register with a new account.
Thank you

BYOD , ISE MAC OS X Client Provision

i have selected profile for MAC OS X, and Cisco Network Assitance never runs!!!
any idea!!! I am not a MAC user..

Hi,
If you are getting redirected to the supplicant provisioning portal you will need to make sure that java is installed and running on the browser since the java applet is what opens the supplicant provisioning portal.
Give that a shot and see if your luck changes, also give the session around 30 seconds to start you should see it come up. (i would recommend mozilla since the plugin option will show up right next to the browser bar.
Tarik Admani
*Please rate helpful posts*

ISE 1.2 disable endpoints with certain mac address

Hi All,
We have an AD to authenticate for wireless users. In AD, we have specified to block the user if the password is entered wrongly for more than 3 times. The problem is some of them are using other user ID and locking the accounts. I have gotten the MAC address of the user. Can anyone please advise how to block the request from this MAC from even reaching the AD.
Thanks

You have two options from ISE and one option from the WLC:
The first option which is not very scalable is to modify your authentication policy to deny access to an specific MAC address(Radius:Calling station ID). But this is not very scalable as you can only specify one MAC address.
Your second option is to enable the anomalous client suppression(under systems->settings->protocols->RADIUS). This will be your best option but it would require a bit of testing to identify what are the best values for your environment.
From the controller you can enable the excessive 802.1x authentication failures. By default it won't even send the fourth authentication to ISE for a failing endpoint:

Cisco ISE - Excessive "Misconfigured Supplicant Detected/Fixed" events

I have noticed recently that I am getting a LOT of Misconfigured Supplicant Detected messages, followed anywhere from 3-6 hours later by a "fixed" message. Example below:
Misconfigured Supplicant Detected with EndpointID=00:1B:77:xx:xx:xx from user=host/Example
Misconfigured Supplicant Detected with EndpointID=00:1B:77:xx:xx:xx is fixed.
I'm getting 100+ of these messages every day. The amount of these messages doesn't seem normal to me. I currently have my ISE deployment in Monitor mode, and I am guessing that if I was in Low-impact mode, I would be getting many calls about user authentication failures every day.
Anyone have any insight/advise on this?
thx

What version of ISE are you running on?
Version:
1.3.0.876
Patch Information:
1
Is this error occurring for same endpoints all the time?
I ran a report on misconfigured supplicants over the past week and discovered that of the 92 offenders 71 are wireless clients using Intel wireless NICs and 21 are connected to a WS-C3560-48PS switch running 12.2(55)SE9. I cannot get a 15.x image on it because of flash memory limitations.
Do you have client suppression feature enable on ISE?
I have Anomalous client suppression enabled for logging.
Are there known issues with Intel NICs? There are 4 different Intel MACs among the 71 wireless clients.

Cisco ISE (1.3) Posture without Client Provisioning

Hello readers,
Is it possible to set up Cisco ISE with posture without Client Provisioning?
My customer deploys the NAC Agent via MS SCCM. We prefer a access accept + DACL during the pending state instead of redirecting to client provisioning. But the NAC Agent will only communicate when we redirect to client provisioning.
Regards,
Dennis

With ISE you can perform 802.1x first and after that optionally you can perform posture. This is done with Radius, that's why it's really and completely out of band, and there's no such concept of trusted or untrusted port because the traffic is never inline.
Still, with ISE you have another option of "inline Posture", in which there's trusted and untrusted ports. I guess that's for some specific cases in which you can't go out-of-band.
On the other hand, so called "out-of-band" NAC was really always an inline solution, only after the user has authenticated and security policies have been verified then the user goes "out-of-band".

ISE, BYOD: win clients reject ISE local-certificate

Hello!
We are deploying BYOD with Cisco ISE 1.1.2 and WLC (5508) using 802.1x authentication.
Windows clients cannot connect to 802.1x SSID with the following error on ISE:
Authentication failed : 12321 PEAP failed SSL/TLS handshake because the client rejected the ISE local-certificate
The client doesn't have preconfigured wifi profile or root certificate installed.
The concept of BYOD suppose that you can connect your device without any installed certificates and preconfigured wifi-profiles.
The problem is that Windows 7 supplicant does not send TLS alert in pop up window, when connecting to 802.1x SSID.
If this alert is seen, than you can accept it and proceed the connection. After that you will be asked to install ROOT-cert, get your own cert and etc.
So, the question is: how to make the windows supplicant to show the pop-up window with TLS alert?
p.s. the attached file shows the example of pop up TLS-alert window

Are there any recommendations from Cisco about the issue with Windows?
I believe there's a new version of smart solution design guide coming up.
The current one does not mention anything to do with certs in "User Experience" chapter.
You can check one of the possible approaches in Nico's document:
http://www.cisco.com/en/US/products/ps11640/products_configuration_example09186a0080bead09.shtml
(It can be easily expended).
I think irt. PEAP we will always say that the cert or the root/sub CA cert should be already trusted on the device when perfoming enrollment.
Will try to dig in, can't say I promise to get something concrete though.

Cisco ISE and Catalyst 2950

Hello!
Please, could you help me? Is it possible to install ISE on Catalyst 2950? In Component Compatibility Guide
http://www.cisco.com/en/US/docs/security/ise/1.0.4/compatibility/ise104_sdt.html
Catalyst 2950 only support 802.1X and VLAN.
At first I need to know about VLAN change(from resticted to corporate). Is Catalyst 2950 support it?
Thaks for help!

this would let both user and machine authenticate. for"5434Endpoint conducted several failed authentications of the same scenario" check Suppress Anomalous Clients option. This issue comes in to picture when endpoint attempts a couple of failed authentications and if Suppress Anomalous Clients option with Reject Requests After Detection is enabled then ISE Policy nodes protect themselves from overwhelming numbers of authentication requests by sending an immediate reject for suppressed clients as opposed to processing all the steps in a normal authentication. So if that user did some authentication failure, he will be locked for 1 hours (bydefault).

ISE 1.2 anomalous client suppression

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