Cisco ISE - Reauthentication of client if server becomes alive again

Dears,
I have this case where Cisco ISE server is used to authenticate & authorize clients on the network.
I configured the switch port to authorize the client in case the ISE server is dead (or not reachable).
The thing is that I want to reauthenticate the client once the ISE server becomes alive again but I am not able to.. ("Additional Information is needed to connect to this network" bullet is not appearing and the client PC remains authenticated and assigned to the VLAN.
Below is the switch port configuration:
interface FastEthernet0/5
switchport access vlan 240
switchport mode access
switchport voice vlan 156
authentication event server dead action authorize vlan 240
authentication event server alive action reinitialize
authentication host-mode multi-domain
authentication order dot1x mab
authentication priority mab
authentication port-control auto
mab
dot1x pae authenticator
spanning-tree portfast
Anyone can help?
Regards,

Please check whether the switch is dropping the connection or the server.
Symptoms or Issue
 802.1X and MAB authentication and authorization are successful, but the switch is dropping active sessions and the epm session summary command does not display any active sessions.
Conditions
 This applies to user sessions that have logged in successfully and are then being terminated by the switch.
Possible Causes
 •The preauthentication ACL (and the subsequent DACL enforcement from Cisco ISE) on the NAD may not be configured correctly for that session.  
•The preauthentication ACL is configured and the DACL is downloaded from Cisco ISE, but the switch brings the session down.  
•Cisco ISE may be enforcing a preposture VLAN assignment rather than the (correct) postposture VLAN, which can also bring down the session.
Resolution
 •Ensure the Cisco IOS release on the switch is equal to or more recent than Cisco IOS Release 12.2.(53)SE.  
•Check to see whether or not the DACL name in Cisco ISE contains a blank space (possibly around or near a hyphen "-"). There should be no space in the DACL name. Then ensure that the DACL syntax is correct and that it contains no extra spaces.  
•Ensure that the following configuration exists on the switch to interpret the DACL properly (if not enabled, the switch may terminate the session):  
radius-server attribute 6 on-for-login-auth
radius-server attribute 8 include-in-access-req
radius-server attribute 25 access-request include
radius-server vsa send accounting
radius-server vsa send authentication

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    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".

  • 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 and external syslog server

    Hi Security Experts,
    We are starting with deploying cisco ISE (Identity Services Engine) in our network. We have allocated 250GB space for (Admin+Monitor) ISE node.
    I want to know if we can send the logs from monitoring node to external syslog server after a defined time interval.
    For example, logs which are more than 10 days old should be sent to external syslog server. So basically our monitoring node will have logs which are at the max 9 days old. Is it possible? Could you point me to some doc which explains configuration of the same?
    Thanks,
    Kashish

    No this isnt possible via syslog. What you are looking for is database purging, so that the monitoring database is purged after a specific time interval. Here is a guide that will help shed some light on this:
    http://www.cisco.com/en/US/docs/security/ise/1.1/user_guide/ise_mnt.html#wp1054328
    Tarik Admani
    *Please rate helpful posts*

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