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Thread: IAS Event ID 2: reason code 23: Unknown - Clients cant authticate

  1. #1
    cdlaurie Guest

    IAS Event ID 2: reason code 23: Unknown - Clients cant authticate

    Hi,

    I am having some problems with securing our WLAN with PEAP &
    passwords. The client will not authenticate when a certificate is
    specified. I CAN connect ok if i dont specify a certificate in the
    wlan card settings.

    I have a windows 2003 r2 domain. CA & IAS are installed on a DC. IAS
    policy is configured to specify the certificate.

    I have installed root certificate on client machines in Trusted Root
    certification authorities.

    Access Point auth: WPA
    Enccryption: TKIP
    EAP type: PEAP
    Auth Protocol: MS-CHAP 2

    I am seeing the following event logged on the IAS server:

    I am bangiong my head on this one. I have reconfigured everything from
    scratch twice, but cant understand why it wont work with the
    certificate specified???

    Any help really appreciated!

    ---------------------------

    Event Type: Warning
    Event Source: IAS
    Event Category: None
    Event ID: 2
    Date: 28/05/2009
    Time: 11:51:07
    User: N/A
    Computer: WMEDC02
    Description:
    User woodmac\laurco was denied access.
    Fully-Qualified-User-Name = woodmac.com/User Objects/Technology/Colin
    Laurie
    NAS-IP-Address = 147.114.179.99
    NAS-Identifier = 001c10667328
    Called-Station-Identifier = 001c10667328
    Calling-Station-Identifier = 00215c442961
    Client-Friendly-Name = wap01
    Client-IP-Address = 147.114.179.99
    NAS-Port-Type = Wireless - IEEE 802.11
    NAS-Port = 12
    Proxy-Policy-Name = Use Windows authentication for all users
    Authentication-Provider = Windows
    Authentication-Server = <undetermined>
    Policy-Name = WLAN
    Authentication-Type = PEAP
    EAP-Type = <undetermined>
    Reason-Code = 23
    Reason = Unexpected error. Possible error in server or client
    configuration.

  2. #2
    Join Date
    Jun 2009
    Posts
    1

    Re: IAS Event ID 2: reason code 23: Unknown - Clients cant authticate

    Same here... someone already found a solution or cause?

    Regards Randy

  3. #3
    Randy Guest

    RE: IAS Event ID 2: reason code 23: Unknown - Clients cant authticate

    Same issue here... anyone a solution?

    "cdlaurie" wrote:

    > Hi,
    >
    > I am having some problems with securing our WLAN with PEAP &
    > passwords. The client will not authenticate when a certificate is
    > specified. I CAN connect ok if i dont specify a certificate in the
    > wlan card settings.
    >
    > I have a windows 2003 r2 domain. CA & IAS are installed on a DC. IAS
    > policy is configured to specify the certificate.
    >
    > I have installed root certificate on client machines in Trusted Root
    > certification authorities.
    >
    > Access Point auth: WPA
    > Enccryption: TKIP
    > EAP type: PEAP
    > Auth Protocol: MS-CHAP 2
    >
    > I am seeing the following event logged on the IAS server:
    >
    > I am bangiong my head on this one. I have reconfigured everything from
    > scratch twice, but cant understand why it wont work with the
    > certificate specified???
    >
    > Any help really appreciated!
    >
    > ---------------------------
    >
    > Event Type: Warning
    > Event Source: IAS
    > Event Category: None
    > Event ID: 2
    > Date: 28/05/2009
    > Time: 11:51:07
    > User: N/A
    > Computer: WMEDC02
    > Description:
    > User woodmac\laurco was denied access.
    > Fully-Qualified-User-Name = woodmac.com/User Objects/Technology/Colin
    > Laurie
    > NAS-IP-Address = 147.114.179.99
    > NAS-Identifier = 001c10667328
    > Called-Station-Identifier = 001c10667328
    > Calling-Station-Identifier = 00215c442961
    > Client-Friendly-Name = wap01
    > Client-IP-Address = 147.114.179.99
    > NAS-Port-Type = Wireless - IEEE 802.11
    > NAS-Port = 12
    > Proxy-Policy-Name = Use Windows authentication for all users
    > Authentication-Provider = Windows
    > Authentication-Server = <undetermined>
    > Policy-Name = WLAN
    > Authentication-Type = PEAP
    > EAP-Type = <undetermined>
    > Reason-Code = 23
    > Reason = Unexpected error. Possible error in server or client
    > configuration.
    >


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