Indicates the protocol version number supported by the EAPoL packet sender. Indicates an expanded type, which can be customized by vendors. Indicates that the authentication method is EAP-PEAP. Indicates that the authentication method is EAP-TTLS. Indicates that the authentication method is EAP-TLS. For example, many banks in China provide a dynamic token for users who apply for e-banking. A GTC is similar to an OTP except that a GTC usually corresponds to an actual device. Indicates that the authentication method is Generic Token Card (GTC).
#Wireshark filter by protocol eap password#
For example, during e-banking payment, the system sends a one-time password through an SMS message. Indicates that the authentication method is One-Time Password (OTP). Indicates that the authentication method is MD5-Challenge. For example, if the access device uses an authentication method not supported by the client to initiate a request, the client can send a Response/NAK packet to notify the access device of the authentication methods supported by the client. Indicates negative acknowledgment and is used only in a Response packet.
Transmits notification information about some events, such as password expiry and account locking. Requests or returns the user name information entered by a user. Table 1-2 Common values of the Type field
#Wireshark filter by protocol eap code#
When the value of the Code field is 3 or 4, the EAP data packet is a Success or Failure packet and does not have the Data field.The Type Data field is multiple bytes long and its value is determined by the Type field. The Type field is one byte long and indicates the type of the Request or Response packet. When the value of the Code field is 1 or 2, the EAP data packet is a Request or Response packet, and the Data field contains the Type and Type Data fields, as shown in the preceding figure.The format of the Data field is determined by the Code field. Bytes outside the range of the Length field are treated as padding at the data link layer and ignored on reception. Indicates the length of an EAP data packet, including the Code, ID, Length, and Data fields. Is used to match a Response packet with the corresponding Request packet. Indicates the type of an EAP data packet. EAP relay mode: The access device directly encapsulates the received EAP packets into RADIUS using EAP over RADIUS (EAPoR) packets, and then transmits these packets over a complex network to the authentication server.The authentication server then uses the standard RADIUS protocol to implement authentication, authorization, and accounting. EAP termination mode: The access device terminates EAP packets and encapsulates them into RADIUS packets.You can determine to use either of the following authentication modes between the access device and authentication server based on the client support and network security requirements:.The EAP packets transmitted between the client and access device are encapsulated in EAPoL format and transmitted across the LAN.This offers great flexibility to 802.1X authentication. EAP can run without an IP address over various bottom layers, including the data link layer and upper-layer protocols (such as UDP and TCP). In the 802.1X authentication system, the client, access device, and authentication server exchange information using the Extensible Authentication Protocol (EAP).
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