IETF RFC 3748 PDF
- September 12, 2019
Canonical URL: ; File formats: Plain Text PDF Discuss this RFC: Send questions or comments to [email protected] This document defines the Extensible Authentication Protocol (EAP), an authentication framework which supports multiple authentication methods. EAP typically. Network Working Group B. Aboba Request for Comments: Microsoft Obsoletes: L. Blunk Category: Standards Track Merit Network, Inc J. Vollbrecht.
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For example, errors can occur prior to key derivation, and so it may not 37748 possible to protect all failure indications. Archived from the original on 26 November An authenticator MAY authenticate local peers, while at the same time acting as a pass-through for non-local peers and authentication methods it does not implement locally.
Typically, an EAP implementation on a given host will support either rfd or authenticator functionality, but it is possible for a host to act as both an Irtf peer and authenticator. This implies that even if As a result, cleartext passwords cannot be securely used within EAP, except where encapsulated within a protected tunnel with server authentication. However, it is possible for a pass-through authenticator acting as a AAA client to provide correct information to the AAA server while communicating misleading information to the EAP peer via a lower layer protocol.
The authenticator SHOULD interpret the receipt of a key attribute within an Accept packet as an indication that the peer has successfully authenticated the server.
It cannot be assumed that the contents of the Notification Request or Response are available to another method. This document obsoletes RFC Similarly, a server that has successfully authenticated the peer does not consider the authentication successful until it receives an indication that the peer has ietc the server.
RFC – Extensible Authentication Protocol (EAP) –
It was co-developed by Funk Software and Certicom and is widely supported across platforms. In this document, the terms “AAA server” and “backend authentication server” are used iehf. In EAP there is no provision for retries of failed authentication. To avoid unnecessary resets, iett is advisable to damp these indications, rather than passing them directly to the EAP.
However, as noted in Section 7. It is more likely that the physical theft of a smart card would be noticed and the smart card immediately revoked than a typical password theft would be noticed. Success and Failure are discussed in Section 4. The EAP multiplexing model is illustrated in Figure 1 below.
WPA2 and potentially authenticate the wireless hotspot. Result indications A method provides result indications if after the method’s last message is sent and received: A host receiving an EAP packet may only do one of three things with it: After such an attack, if the lower layer supports failure indications, the authenticator can synchronize state with the peer by providing a lower layer failure indication.
EAP is not a wire protocol; instead it only defines message formats. When used, this server typically executes EAP methods for the authenticator. Views Read Edit View history. Table of Contents 1.
Unless the authenticator implements one or more authentication methods locally which support the authenticator role, the EAP method layer header fields Type, Type-Data are not examined as part of the forwarding decision.
In general, a fragmented EAP packet will require as many round-trips to send as there are fragments. Since the Identifier is only a single octet, it is easy to guess, allowing an attacker to successfully inject or replay EAP packets. It forwards EAP packets received from the ffc and destined to its authenticator layer to the backend authentication server; packets received from the backend authentication server destined to the peer are forwarded to it.
As noted in [ RFC ] Section 2. This is discussed in more detail in Section 7.
FRAMEIP.COM
EAP is an authentication framework for providing the transport and usage of keying material and parameters generated by EAP methods. As a result, Identity Requery is not supported.
As noted in Section 3. Where supported by the lower layer, an authenticator sensing the absence of the peer can free resources. The authenticator is responsible for retransmitting requests as described in Section 4.
EAP Types – Extensible Authentication Protocol Types
Two independent one-way methods, running in opposite directions do not provide mutual authentication as defined here. EAP methods may support result indications, enabling the peer to indicate to the EAP server within the method that it successfully authenticated the EAP server, as ietg as for the server to indicate that it has authenticated the peer.
The Identity Type is discussed in Section 5. Cleartext Passwords This specification does not define a mechanism for cleartext password authentication. To address security vulnerabilities, “tunneled” methods MUST support protection against man-in-the-middle attacks.
Depending on the method and circumstances, result indications can be spoofable by an attacker.
