Allied Telesis sr264-03 manual Availability

6 Patch Release Note

7.When the supplicant sends an EAPOL-Logoff message to the authenticator the port under 802.1x control is set to unauthorised.

A successful authentication message exchange, initiated and ended by a supplicant using OTP authentication, is shown in below.

To minimise the risk of denial-of-service attacks by issuing EAPOL-Logoff messages to an Authenticator Port Access Entity (PAE) from a third party device, we recommend that 802.1x not be used in a shared media LAN.

Figure 1: Authentication Messaging Exchange Initiated by the Supplicant.

Supplicant PAE	Authenticator PAE	Authenticator Server
	Port Unauthorised

EAPOL-Start

EAP-Request/Identity

EAP-Response/Identity

EAP-Request/OTP

EAP-Response/OTP

EAP-Success

Port Authorised

EAPOL-Logoff

	Port Unauthorised
Exchange of EAPOL frames
	Exchange of EAP frames carried
	by RADIUS

8021X5

Availability

Patches can be downloaded from the Software Updates area of the Allied Telesyn web site at www.alliedtelesyn.co.nz/support/updates/patches.html. A licence or password is not required to use a patch.

Patch sr264-03 for Software Release 2.6.4 C613-10407-00 REV C