ORiNG IGS-9168GP series, Руководство пользователя

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IGS-9168GP User’s Manual
ORing Industrial Networking Corp 124
The maximum number of supplicants that can be attached to a port can
be limited using the Port Security Limit Control functionality.
MAC-based Auth.
Unlike port-based 802.1X, MAC-based authentication is not a standard,
but merely a best-practices method adopted by the industry. In
MAC-based authentication, users are called clients, and the switch acts
as the supplicant on behalf of clients. The initial frame (any kind of
frame) sent by a client is snooped by the switch, which in turn uses the
client's MAC address as both username and password in the
subsequent EAP exchange with the RADIUS server. The 6-byte MAC
address is converted to a string in the following form "xx-xx-xx-xx-xx-xx",
that is, a dash (-) is used as separator between the lower-cased
hexadecimal digits. The switch only supports the MD5-Challenge
authentication method, so the RADIUS server must be configured
accordingly.
When authentication is complete, the RADIUS server sends a success
or failure indication, which in turn causes the switch to open up or block
traffic for that particular client, using the Port Security module. Only then
will frames from the client be forwarded on the switch. There are no
EAPOL frames involved in this authentication, and therefore,
MAC-based authentication has nothing to do with the 802.1X standard.
The advantage of MAC-based authentication over port-based 802.1X is
that several clients can be connected to the same port (e.g. through a
3rd party switch or a hub) and still require individual authentication, and
that the clients don't need special supplicant software to authenticate.
The advantage of MAC-based authentication over 802.1X-based
authentication is that the clients do not need special supplicant software
to authenticate. The disadvantage is that MAC addresses can be
spoofed by malicious users - equipment whose MAC address is a valid
RADIUS user can be used by anyone. Also, only the MD5-Challenge
method is supported. The maximum number of clients that can be
attached to a port can be limited using the Port Security Limit Control
functionality.
Port State
The current state of the port. It can undertake one of the following
values:
Globally Disabled : NAS is globally disabled.
Link Down : NAS is globally enabled, but there is no link on the port.