NAC Agent - Loop in Remediation WSUS

Hello,
I´m implementing WSUS Posture in my ISE environment.
When NAC Agent detect a new Windows Update, the Remediation Action is Automatic. I configured Show UI the Wizard Interface and this is working well.
But, after the windows update instalation, the NAC Agent stay in Remediation Process. Looking for WindowsUpdate.log file, I see repetitive messages like:
Updates Found = 0 OR Found 0 Updates and X categories in search.
If I use the Windows Update from Windows to Search and Install the Updates, work very well too.
The image attached, ilustrate my problem(In this point, The Windows Update instalation was done):

Updating..
Approximately after 30 minutes, NAC Agent finished the process of Remediation. (Only 1 Windows Update package)
apparently the station sends many reports to WSUS and while it does, the NAC Agent continues Remediation on the process, even after installing the update.
I'm sure there are how to optimize it, but if anyone has any tips I'd appreciate it.
Best Regards,
Daniel Stefani

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NAC Agent 4.9 issue while remediation with in ISE

We are installed NAC agent 4.9 where we have configured posture policy for Symantec Endpoint Protection version 11x in ISE 1.1.1. Where when enduser fallen down to remediation and try to remediate to collect the latest anti virus definitions from Local Antivirus, when clicking on the update button we get a message stating
"The Remediation you are attempting is reporting an access denied error. This is usually due to a privileg issue. Please contact your system
administrator"
It continuosly asking that prompt and giving that priviligae message.
Are we need to have administrator rights for remediation ? and this prompt is appearing again and again till the remediation timer and then it fallen down to Non-compliant (Restricted ) profile.
Please find attached screen shots for the same

I figured out a solution that works you must disable Online Certificate Status Protocol (OCSP) on the affected system. To do this :
    Open Keychain Access. Keychain Access can be found by selecting Go in the Finder and choosing the Utilities option. Keychain access should be listed in the folder that appears. Double-click the Keychain Access icon to open it.
    Select Keychain Access -> Preferences from the menu at the top of the screen
    Choose the Certificates tab
    Change the OCSP option from Best Effort to Off
    Close the Preferences dialog and quit Keychain Access
    You should be able to NAC now

Nac Agent do not execute remediation

Hi to all,
in a lab enviroment i have configured a CAM/CAS solution on 3310 server and I have installed 2 pc (one windows Vista and one XP) with nac client 4.6.2.133 version.
My problem is auto-remediation and manual-remediation, client get me a temporaney access but do not start a live update programa (i use symantec endpoint protection 11).
I have admin right on both pc.
Why I can solve the problem?
Thanks for help

There is not automatic remediation for all products. You must launch the endpoint protection, click live-update, then re-scan on the NAC agent and you will pass.
Quote from Cisco Doc (http://www.cisco.com/en/US/docs/security/nac/appliance/configuration_guide/45/cam/m_agent.html):
"â¢Not all product versions of a particular vendor may support the Clean Access Agent launching the automatic update of the product. In this case, you can provide instructions (via the Description field of the AV or AS Definition Update requirement) to have users update their AV or AS definition files from the interface of their installed AV or AS product."
If you have verified that your requirement-rule is specifically for Symantec Endpoint Protection 11, and the rule has automatic remediation configured, then it may fall into this scenario. You may also have it configured where the endpoint protection is not accessible to the end-user and requires admin rights to launch. Please put the client in debug and send the results to TAC for analysis, as it would be the best bet for you to get a clear answer.
Hope that helps, rate if it does.
Cheers,
Tim

NAC Agent Installation "loop"

Hello Guys, me again
I'm seeing an issue when the client tries to install the NAC agent on his PC.
The client reports that an update is available for which I click OK, then it appears to download the new agent (really fast btw) and then it starts installing it. Once that's done it reports again that an update is available and the process starts all over and keeps going on indefinetely.
The only way I managed to get around it was by disabling the "upgrade mandatory" setting on the client provisioning policy. Still I get the "an upgrade is available" message only that with that setting disabled I can hit cancel and continue.
Another thing that I'm seeing is that client that I'm seeing as installed on the client is 4.9.0.36 but the ISE only has 4.9.0.37 so I dont know where the .36 is coming from if nothing has been previously installed on the client.
Has anybody else run into this issue before?
Thanks in advance,
Luis Raga

I'm getting the same issue. I have agents running version 4.7.2.10 and the new version that they are being prompted to install is version 4.9.2.8. The install starts and seems to complete, but when the NAC agent restarts the user is prompted to reinstall the new agent. When you check the version of the NAC installed it is still 4.7.2.10.
Sachin

NAC agent failing to popup

                   Dears,
I have two ISE appliances installed in a distributed deployment (primary "ISE1" and secondary "ISE2"), each node has the three personas installed on it. The servers are registered together and the replication is working properly between the nodes.
When we are working on the first node everything is fine, if I try to disconnect ISE1 and do my tests on ISE2, the cisco NAC agent doesn't popup, unless I uninstall it and reinstall it again from the ISE2. Then it will work properly.
Note: the NAC agent version is the following: nacagent-4.9.0.37.
Any idea?
Regards
Zahi

Hi Tarik,
below are my answers:
1- The content of the dACL:
ip access-list extended POSTURE-REMEDIATION
permit udp any any eq domain
permit ip any host 10.10.10.125         >>>> antivirus server
permit ip any 10.10.240.0 0.0.0.255   >>>> voice subnet
permit ip any 10.10.31.0 0.0.0.255    >>>> quarantine vlan subnet
permit ip any host 10.10.10.238        >>>> ip add of ISE1
permit ip any host 10.10.10.239        >>>> ip add of ISE2
permit ip any host 10.10.10.206        >>>> wsus server
permit ip any host 10.10.10.10          >>>> domain 1
permit ip any host 10.10.10.100          >>>> domain 2
2- When I open a web browser, yes I get redirected to the nac agent download page
3- outputs of the show authentication session interface fast 0/12, when the agent pops up with ISE1:
sw#sho authentication sessions int fast 0/12
            Interface: FastEthernet0/12
          MAC Address: b8ac.6fc9.b26f
           IP Address: 10.10.31.2
            User-Name: RJ\15592
               Status: Authz Success
               Domain: DATA
      Security Policy: Should Secure
      Security Status: Unsecure
       Oper host mode: single-host
     Oper control dir: both
        Authorized By: Authentication Server
          Vlan Policy: 31
              ACS ACL: xACSACLx-IP-POSTURE-REMEDIATION-4fe82900
     URL Redirect ACL: ACL-POSTURE-REDIRECT
         URL Redirect: https://RJ-ISE-1.rj.com:8443/guestportal/gateway?session
Id=0A0A0C86000000186ADBBD8B&action=cpp
      Session timeout: N/A
         Idle timeout: N/A
    Common Session ID: 0A0A0C86000000186ADBBD8B
      Acct Session ID: 0x00000023
               Handle: 0x31000018
Runnable methods list:
       Method   State
       dot1x    Authc Success
       mab      Not run
sw#sho authentication sessions int fast 0/12
            Interface: FastEthernet0/12
          MAC Address: b8ac.6fc9.b26f
           IP Address: 10.10.30.12
            User-Name: RJ\15592
               Status: Authz Success
               Domain: DATA
      Security Policy: Should Secure
      Security Status: Unsecure
       Oper host mode: single-host
     Oper control dir: both
        Authorized By: Authentication Server
          Vlan Policy: 30
              ACS ACL: xACSACLx-IP-PERMIT_ALL_TRAFFIC-4f57e406
      Session timeout: N/A
         Idle timeout: N/A
    Common Session ID: 0A0A0C86000000186ADBBD8B
      Acct Session ID: 0x00000023
               Handle: 0x31000018
Runnable methods list:
       Method   State
       dot1x    Authc Success
       mab      Not run
outputs of the show authentication session interface fast 0/12, when the agent pops up with ISE2:
sw#sho auth sessions int fast 0/12
            Interface: FastEthernet0/12
          MAC Address: 0025.6458.8409
           IP Address: 10.10.31.8
            User-Name: RJ\15946
               Status: Authz Success
               Domain: DATA
      Security Policy: Should Secure
      Security Status: Unsecure
       Oper host mode: single-host
     Oper control dir: both
        Authorized By: Authentication Server
          Vlan Policy: 31
              ACS ACL: xACSACLx-IP-POSTURE-REMEDIATION-4fe82900
     URL Redirect ACL: ACL-POSTURE-REDIRECT
         URL Redirect: https://RJ-ISE-2.rj.com:8443/guestportal/gateway?session
Id=0A0A0C86000000206AF3FAC1&action=cpp
      Session timeout: N/A
         Idle timeout: N/A
    Common Session ID: 0A0A0C86000000206AF3FAC1
      Acct Session ID: 0x0000002B
               Handle: 0x2C000020
Runnable methods list:
       Method   State
       dot1x    Authc Success
       mab      Not run
you may find attached also the pcap file of the client machine when it is authenticating with the ISE2.
Thank you in advance
Zahi
Message was edited by: ZAHI BOU KHALIL

Is it possible to run Posture using ISE 1.2 without NAC Agent provisioning?

Is it possible to run Posture using ISE 1.2 without NAC Agent provisioning?
-My customer does not want to push NAC Agent installation on BYOD type of computers (non-managed by the company computers).
-The requirement is to check for posture only company owned wired, wireless, and VPN connected Windows computers. The rest of the endpoints should be considered as posture incompliant, and limited access to the network should be allowed.
-No certificates are used.
-I’ve configured the required posture check, and it all works fine if a PC has NAC Agent manually installed (without ISE Client Provisioning). However, when I use a PC without NAC Agent, it is redirected to Client Provisioning Portal and is stuck there as Client Provisioning is deliberately not configured in ISE.
-If I remove Posture Remediation Authorization Profile that does URL redirect, the posture does not work.
-For now I'm testing it on wired endpoints.
Is there a way to configure ISE to fulfill the listed above requirements?
Any ideas would be appreciated.
Thanks,
Val Rodionov

Everyone who finds reads this article,
I'm answering my own quesiton "Is it possible to run Posture using ISE 1.2 without NAC Agent provisioning?"
The answer is Yes.
After doing research and configuration testing I came up with a solution, and it works fine for wired and VPN connections. I expect it to work on wireless endpoints as well.
ISE configuration:
Posture General Settings - Default Posture Status = NonCompliant
Client Provisioning Policy - no rules defined
Posture Policy - configured per requirements
Client Provisioning (under Administration > Settings) - Enable Provisioning = Enable (it was disabled in my first test)
Authorization Policies configured as regular posture policies
The result:
After successful dot1x authentication posture redirect happens. If the PC does not have NAC Agent preinstalled, the browser is redirected to Client Provisioning Portal and a default ISE message is displayed (ISE is not able to apply and access policy... wait one minute and try to connect again...). At the same time, the endpoint is assigned NonCompliant posture status and proper authorization policy is applied. This is what I wanted to achieve.
If NAC Agent was preinstalled on the PC, after successful dot1x authentication the NAC Agent pops up and performs posture check. If posture is successful, posture compliant authorization policy is applied. If posture check fails, NonCompliant posture status is assigned and posture non-compliant authorization policy is applied. Which is the expected and needed result.
The only part that is not perfect it the message displayed to the end-user when posture is about to fail. I did not find a place to change the text of that message. I might need to open TAC case, so this file can be manually found and edited from CLI (root access).
Best,
Val Rodionov

Question about cisco nac agent

When I deploy Cisco NAC appliance, the main different between using cisco nac appliance with or without agent? I see Cisco NAC agent has two function: scan and remediation. If Cisco NAC appliance without agent, Cisco NAC server will scan device and remediation. That is right?
Please answer me early. Thank you for your answer.

Sorry, I believe daldden is correct, without the agent you can still scan using the built-in Nessus scanner.
We don't use the Nessus scanner, but these are some things to consider if you use the scanner. These are from memory though so anyone who actively uses the scanner may be able to give more up to date or complete info:
1) You have to decide which vulnerabilities you want to scan for.
2) The more plug-ins you enable, the longer (obviously) the scan takes.
3) There are configuration steps for many of the plug-ins
4) Your users will still need to go to a login page in order to be scanned.
5) You have to configure the remediation information (URL, steps, etc) for each plug-in you enable.
From our view point, the only reason we would enable the scanner is if we were looking for a specific vulnerability, perhaps a new threat that didn't yet have a patch. If it had a patch, we would watch for the patch using the agent (installed or web based).
It was much easier for us to use the agent, to scan their system and make sure that the MS critical hot fixes were installed and/or an AV system was installed and up to date. As mentioned, if there is a patch for a vulnerability, you can use the agent to make sure that specific hot fix is installed.
Remember that there is also a web agent. The web agent is an ActiveX or Java (you pick which one you want to use) applet that is loaded onto the person's machine, the system scanned, then the applet is unloaded.
Of course, the agent is only for MSoft (with some MAC options), so if you have Linux systems, the Nessus scanner would be your only option.

NAC Agent Login Dialog Not Appearing - ISE 1.1.1 issue ?

Agent Fails to Initiate Posture Assessment
The NAC agent is properly installed on a Windoes 7 , IE 9 machine, the certificates from ISE ADM PRI are installed in trustable certificate store in the client machine but is a selfsigned ISE certificate.
The reports / USER / Profiling report says the Provisioning Agent has completed the assessment ok.
The redirected URL is working fine (SEE Evidence)
We are always prompted to install the NAC agent again or looking at the additional prompted information wait for the NAC agent to load and complete.
The operations status remains with postering status pending forever and nothing else happens.
Symptoms or Issue
The agent login dialog box does not appear to the user following client provisioning.
Conditions Cisco Says this issue can generally take place during the posture assessment phase of any user
authentication session.
Cisco Advises as Possible Causes There are multiple possible causes for this type of issue. See the following
Resolution descriptions for details of what was already tested by us and please see the atached files for your switch configuration and evidences. .
CISCO SUGGESTED POSSIBLE CAUSES AND RESOLUTIONS
Resolution • Ensure that the agent is running on the client machine. ALL TESTED OK
• Ensure that the Cisco IOS release on the switch is equal to or more recent than
Cisco IOS Release 12.2.(53)SE. - OK
• Ensure that the discovery host address on the Cisco NAC agent or Mac OS X
agent is pointing to the Cisco ISE FQDN. (Right-click on the NAC agent icon,
choose Properties, and check the discovery host.) - OK (See evidence)
• Ensure that the access switch allows Swiss communication between Cisco ISE
and the end client machine. Limited access ACL applied for the session should
allow Swiss ports: ALL CONFIGURED as CISCO GUIDELINES OK (SEE EVIDENCE)
• If the agent login dialog still does not appear, it could be a certificate issue.
Ensure that the certificate that is used for Swiss communication on the end client
is in the Cisco ISE certificate trusted list. (ALL CHECKED OK SEE EVIDENCE)
• Ensure that the default gateway is reachable from the client machine. (TESTED OK)

Hi.
Can you paste all the ACLs on your switch especially the webauth redirect ACL which should deny traffic towards the PSN.
regards
Zubair

Cisco NAC Agent 4.9.1.682 Problems with Mac Os X 10.7.4

Hi
My Cisco NAC Agent (version 4.9.1.682) doesn't work since I upgraded my Mac OS X 4 months ago, This happens every time with CISCO and MAC when there is a new update and it always seems to take forever to fix.
The NAC agent just keeps asking for my login in details even though there are correct (I can log in with a PC no problem).
Any update on when a new version is going to be released - Its getting really frustrating?

I figured out a solution that works you must disable Online Certificate Status Protocol (OCSP) on the affected system. To do this :
    Open Keychain Access. Keychain Access can be found by selecting Go in the Finder and choosing the Utilities option. Keychain access should be listed in the folder that appears. Double-click the Keychain Access icon to open it.
    Select Keychain Access -> Preferences from the menu at the top of the screen
    Choose the Certificates tab
    Change the OCSP option from Best Effort to Off
    Close the Preferences dialog and quit Keychain Access
    You should be able to NAC now

Getting the NAC agent out of the system tray.

I am installing a NAC solution for a customer and they don't want users to have the NAC agent in the sytem tray. Is there any way to do this because they are pretty adamant about it.

Hi,
Currently this isn't possible. If you have an account team, please ping them to get this added to the feature request list.
HTH,
Faisal

NAC Agent takes long time to run

Cisco NAC agent takes long time to popup or run on Windows 7 machine.
The client machine is windows 7, running nac agent 4.9.0.42, against ISE 1.1.1
Any ideas how to reduce NAC Agent timing?

Hi Tariq,
I'm facing the same issue with ISE 1.1.1 (268) with Agent 4.9.0.47 for Windows XP clients. I have already configured "yes" to disabled the l3 swiss delay and reduced the httpa discovery timer from 30 to 05 sec but still clients get aprox 2.30 minutes to popup and finished the posture discovery.
Can you please advise if this is the minimum time or what is the minimum time and what are the parameters to set to a minimum time to complete agent popup and posture discovery..?
Is there any option that we can run this on backgroup..?
thanks in advance..

NAC AGENT - DISCOVERY HOST IP ADDRESS with AD

Hi,
We have deployed a Cisco NAC Agent in our network with GPO update... The deployment model is L3 OOB / Real IP Gateway.
The issue is that, we need to put the IP address in each host manually to start communicating with Cisco NAC Manager.
Is there any way to make it automatic?
Regards,
Mubasher

Hi Mubashir,
I faced the same problem with cisco ISE and Tiago's response actually helped see below.
" You can also distribute the NACAgentCFG.xml file with that value set.
Please find here detailed info regarding this file:
http://www.cisco.com/en/US/docs/security/nac/appliance/configuration_guide/48/cam/m_agntd.html#wp1348376. "
In that link, read the section: Agent Customization Settings
From a NAC agent that has successfully been deployed with the IP configured , go to the NAC agent installation folder
C:\Program Files (x86)\Cisco\Cisco NAC Agent , and copy the NACAgentCFG.xml , open with wordpad and edit the line
IP of PDP node or ISE standalone server
Then place the edited NACAgent.xml file in the same folder as the one where your GPO will pick the agent from. When the Agent is installed , it automatically picks the configs from the .xml file.
Regards,
Henry

NAC Agent reporting never shows a failure

I seem to only get reports for successful agent logins under Device MGMT>Clean Access>Clean Access Agent>Reports. Am I missing a setting somewhere? Even though I have had many failures (testing, etc) I never see a failed report. Any ideas?

Hello,
Could you please confirm what error message you are getting on the NAC agent (if using the NAC agent for posture validation)? The NAC agent will display the standard stuff such as 'temporary access', etc. The message displayed is based upon which requirement is failing, for example a standard AV installation check/rule.
Also, for this failing client, do you see a passed report or no report at all? Well, for the agents that ultimately pass posture assessment (even if a particular check/rule fails) we see a passed report. If the agent never gains access, IE never gets out of 'Temporary Access' we don't see any report. I am hoping that when a Agent fails posture assessment we will see a failed report. IE, we need a way for the service desk to be able to monitor failed sessions proactively, and with the minimal external alerts available (no email, etc) these failed reports would be key.
If we can't see no report at all, there may be something that breaks before that. I have pages and pages of successful reports, but not a single failed report.
A quick way to verify would be to collect the NAC agent's logs after a failure, under
Start > Program Files > Cisco > Client Utilities > Cisco Log Packager I don't see this installed on any of the machines with an agent? Please adivse where I can download it. Thanks.

ISE 1.2 nac agent provision

Hi,
Is there any way to do a nac agent auto provision?
I know it can be achieve by cwa portal(web redirect) and user have to install nac agent manually. But we would like to see nac agent be installed right afeter user successfully login using 802.1x.

I dont follow your thought process but this is how i have most of my deployments are setup.
CWA < NSP < COA < 802.1x < Posture Status Unknown *In this state either client does or doesnt have nac agent in which ISE will proceed to install it or continue probing to for the NAC agent.
Remove CWA < NSP < COA from the picture and you have your exact scenario. What is your work flow look like that it is not "automatic" and define what you mean by "manually"?

NAC Agent and NSP provisioning with ISE 1.1.1

I am trying to get all workstations (OSX and Windows) to install both the Native Supplicant Wizard and NAC Agent during the On-boarding process.
I am currently using the default guest portal in ISE.
The environment has been setup using a Dual SSID design.
At the moment, devices can connect to the provisioning SSID and get CWA. Device registration works, the portal runs the NSP setup which correctly sets up the network adapter.
The problem is the portal never attempts to install the NAC Agent.
The client provisioning policy has a separate policies for wireless/wired as well as OS. Each policy applies both a NSP and NAC Agent configuration. It appears the guest portal only checks the NSP configuration and not the NAC Agent config.
Any ideas?

Just so i understand this correctly you are using both a client provisioning portal and a native supplicant provisoning portal tied into seperate authz policies.
With that out of the way are you checking to see if the client is compliant in the client provisioning portal policy.
Let me know if you have the following configured (example windows OS), this is assuming that the endpoint is statically assigned to RegisteredDevices after native suppliant provisioning.
Rule 0 (endpoint group = RegisteredDevice) AND (AD:Domain user and authentication method:x509 and posturestatus:COMPLIANT) = Permit Access
Rule 1 (endpoint group = RegisteredDevice) AND (AD:domain user AND authentication method:x509[if you deployed certs in the native supp condition] AND workstation NOT EQUAL:COMPLIANT) RESULT client provisioning portal.
Rule 2 (endpoint group = Workstation) AND (AD:Domain User AND authentication mehod using mschapv2) RESULT windows provisioning portal
Hope that helps,
Tarik Admani
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NAC Agent - Loop in Remediation WSUS

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