802.1x EAP认证过程

泰克实验室塑造

1.当用户有上网需求时打开802.1X客户端程序，输入用户名和口令，发起连接请求。此时客户端程序将发出请求认证的报文给交换机，启动一次认证过程。
如下：
Frame 90 (64 bytes on wire, 64 bytes captured)
    Arrival Time: Nov 27, 2006 16:27:33.446030000
    Time delta from previous packet: 3.105345000 seconds
    Time since reference or first frame: 5.082965000 seconds
    Frame Number: 90
    Packet Length: 64 bytes
    Capture Length: 64 bytes
Ethernet II, Src: 00:e0:4c:d7:65:cd, Dst: 01:80:c2:00:00:03
    Destination: 01:80:c2:00:00:03 (Spanning-tree-(for-bridges)_03)
    Source: 00:e0:4c:d7:65:cd (RealtekS_d7:65:cd)
    Type: 802.1X Authentication (0x888e)
    Trailer: A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5...
    Frame check sequence: 0xa5a5a5a5 (incorrect, should be 0xcc6d5b40)
802.1x Authentication
    Version: 1
    Type: Start (1)
    Length: 0
2.交换机在收到请求认证的数据帧后，将发出一个EAP-Request/Identitybaowe请求帧要求客户端程序发送用户输入的用户名。
Frame 91 (64 bytes on wire, 64 bytes captured)
    Arrival Time: Nov 27, 2006 16:27:33.447236000
    Time delta from previous packet: 0.001206000 seconds
    Time since reference or first frame: 5.084171000 seconds
    Frame Number: 91
    Packet Length: 64 bytes
    Capture Length: 64 bytes
Ethernet II, Src: 00:03:0f:01:3a:5a, Dst: 00:e0:4c:d7:65:cd
    Destination: 00:e0:4c:d7:65:cd (RealtekS_d7:65:cd)
    Source: 00:03:0f:01:3a:5a (DigitalC_01:3a:5a)
    Type: 802.1X Authentication (0x888e)
    Trailer: A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5...
    Frame check sequence: 0xa5a5a5a5 (incorrect, should be 0x7d263869)
802.1x Authentication
    Version: 1
    Type: EAP Packet (0)
    Length: 5
    Extensible Authentication Protocol
        Code: Request (1)
        Id: 1
        Length: 5
        Type: Identity [RFC3748] (1)
3.客户端程序响应交换机的请求，将包含用户名信息的一个EAP-Response/Identity送给交换机，交换机将客户端送来的数据帧经过封包处理后生成RADIUS Access-Request报文送给认证服务器进行处理。
Frame 148 (77 bytes on wire, 77 bytes captured)
    Arrival Time: Nov 27, 2006 16:27:36.446199000
    Time delta from previous packet: 2.998963000 seconds
    Time since reference or first frame: 8.083134000 seconds
    Frame Number: 148
    Packet Length: 77 bytes
    Capture Length: 77 bytes
Ethernet II, Src: 00:e0:4c:d7:65:cd, Dst: 01:80:c2:00:00:03
    Destination: 01:80:c2:00:00:03 (Spanning-tree-(for-bridges)_03)
    Source: 00:e0:4c:d7:65:cd (RealtekS_d7:65:cd)
    Type: 802.1X Authentication (0x888e)
802.1x Authentication
    Version: 1
    Type: EAP Packet (0)
    Length: 59
    Extensible Authentication Protocol
        Code: Response (2)
        Id: 1
        Length: 13
        Type: Identity [RFC3748] (1)
        Identity (8 bytes): 03051020

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phil

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