Recently published RFCs

September 25, 2007 at 12:38 PM | categories: python, oldblog | View Comments

RFC 4861 Neighbor Discovery for IP version 6 (IPv6)
This document specifies the Neighbor Discovery protocol for IP Version 6.  IPv6 nodes on the same link use Neighbor Discovery to discover each other's presence, to determine each other's link-layer addresses, to find routers, and to maintain reachability information about the paths to active neighbors. Draft Standard Protocol.

RFC 4862 IPv6 Stateless Address Autoconfiguration
This document specifies the steps a host takes in deciding how to autoconfigure its interfaces in IP version 6.  The autoconfiguration process includes generating a link-local address, generating global addresses via stateless address autoconfiguration, and the Duplicate Address Detection procedure to verify the uniqueness of the addresses on a link. Draft Standard Protocol.

RFC 4941 Privacy Extensions for Stateless Address Autoconfiguration in IPv6
Nodes use IPv6 stateless address autoconfiguration to generate addresses using a combination of locally available information and information advertised by routers.  Addresses are formed by combining network prefixes with an interface identifier.  On an interface that contains an embedded IEEE Identifier, the interface identifier is typically derived from it.  On other interface types, the interface identifier is generated through other means, for example, via random number generation.  This document describes an extension to IPv6 stateless address autoconfiguration for interfaces whose interface identifier is derived from an IEEE identifier.  Use of the extension causes nodes to generate global scope addresses from interface identifiers that change over time, even in cases where the interface contains an embedded IEEE identifier.  Changing the interface identifier (and the global scope addresses generated from it) over time makes it more difficult for eavesdroppers and other information collectors to identify when different addresses used in different transactions actually correspond to the same node. Draft Standard Protocol.

RFC 4942 IPv6 Transition/Co-existence Security Considerations
The transition from a pure IPv4 network to a network where IPv4 and IPv6 coexist brings a number of extra security considerations that need to be taken into account when deploying IPv6 and operating the dual-protocol network and the associated transition mechanisms.  This document attempts to give an overview of the various issues grouped into three categories:
o  issues due to the IPv6 protocol itself,
o  issues due to transition mechanisms, and
o  issues due to IPv6 deployment. Informational

RFC 4943 IPv6 Neighbor Discovery On-Link Assumption Considered Harmful
This document describes the historical and background information behind the removal of the "on-link assumption" from the conceptual host sending algorithm defined in Neighbor Discovery for IP Version 6 (IPv6). According to the algorithm as originally described, when a host's default router list is empty, the host assumes that all destinations are on-link.  This is particularly problematic with IPv6-capable nodes that do not have off-link IPv6 connectivity (e.g., no default router).  This document describes how making this assumption causes problems and how these problems outweigh the benefits of this part of the conceptual sending algorithm.  This memo provides information for the Internet community. Informational

RFC 4959 IMAP Extension for Simple Authentication and Security Layer (SASL) Initial Client Response
To date, the Internet Message Access Protocol (IMAP) has used a Simple Authentication and Security Layer (SASL) profile which always required at least one complete round trip for an authentication, as it did not support an initial client response argument.  This additional round trip at the beginning of the session is undesirable, especially when round-trip costs are high.

This document defines an extension to IMAP which allows clients and servers to avoid this round trip by allowing an initial client response argument to the IMAP AUTHENTICATE command. Proposed Standard Protocol.

RFC 4960 Stream Control Transmission Protocol
This document obsoletes RFC 2960 and RFC 3309.  It describes the Stream Control Transmission Protocol (SCTP).  SCTP is designed to transport Public Switched Telephone Network (PSTN) signaling messages over IP networks, but is capable of broader applications.

SCTP is a reliable transport protocol operating on top of a connectionless packet network such as IP.  It offers the following
services to its users:
o acknowledged error-free non-duplicated transfer of user data,
o data fragmentation to conform to discovered path MTU size,
o sequenced delivery of user messages within multiple streams, with an option for order-of-arrival delivery of individual user messages,
o optional bundling of multiple user messages into a single SCTP packet, and
o network-level fault tolerance through supporting of multi-homing at either or both ends of an association.

The design of SCTP includes appropriate congestion avoidance behavior and resistance to flooding and masquerade attacks. Proposed Standard Protocol.

RFC 4981 Survey of Research towards Robust Peer-to-Peer Networks: Search Methods
The pace of research on peer-to-peer (P2P) networking in the last five years warrants a critical survey.  P2P has the makings of a disruptive technology -- it can aggregate enormous storage and processing resources while minimizing entry and scaling costs.

Failures are common amongst massive numbers of distributed peers, though the impact of individual failures may be less than in conventional architectures.  Thus, the key to realizing P2P's potential in applications other than casual file sharing is robustness.

P2P search methods are first couched within an overall P2P taxonomy. P2P indexes for simple key lookup are assessed, including those based on Plaxton trees, rings, tori, butterflies, de Bruijn graphs, and skip graphs.  Similarly, P2P indexes for keyword lookup, information retrieval and data management are explored.  Finally, early efforts to optimize range, multi-attribute, join, and aggregation queries over P2P indexes are reviewed.  Insofar as they are available in the primary literature, robustness mechanisms and metrics are highlighted throughout.  However, the low-level mechanisms that most affect robustness are not well isolated in the literature.  Recommendations are given for future research. Informational

RFC 4994 DHCPv6 Relay Agent Echo Request Option

This memo defines a Relay Agent Echo Request option for the Dynamic Host Configuration Protocol for IPv6 (DHCPv6).  The option allows a DHCPv6 relay agent to request a list of relay agent options that the server echoes back to the relay agent. Proposed Standard Protocol.

RFC 5004 Avoid BGP Best Path Transitions from One External to Another
In this document, we propose an extension to the BGP route selection rules that would avoid unnecessary best path transitionsbetween external paths under certain conditions.  The proposed extension would help the overall network stability, and more importantly, would eliminate certain BGP route oscillations in which more than one external path from one BGP speaker contributes to the churn. Proposed Standard Protocol.

RFC 5005 Feed Paging and Archiving
This specification defines three types of syndicated Web feeds that enable publication of entries across one or more feed documents. This includes "paged" feeds for piecemeal access, "archived" feeds that allow reconstruction of the feed's contents, and feeds that are explicitly "complete". Proposed Standard Protocol.

RFC 5006 IPv6 Router Advertisement Option for DNS Configuration
This document specifies a new IPv6 Router Advertisement option to allow IPv6 routers to advertise DNS recursive server addresses to IPv6 hosts.  This memo defines an Experimental Protocol for the Internet community. Experimental

RFC 5010 The Dynamic Host Configuration Protocol Version 4 (DHCPv4) Relay Agent Flags Suboption
This memo defines a new suboption of the Dynamic Host Configuration Protocol (DHCP) relay agent information option that allows the DHCP relay to specify flags for the forwarded packet.  One flag is defined to indicate whether the DHCP relay received the packet via a unicast or broadcast packet.  This information may be used by the DHCP server to better serve clients based on whether their request was originally broadcast or unicast. Proposed Standard Protocol.

RFC 5014 IPv6 Socket API for Source Address Selection
The IPv6 default address selection document (RFC 3484) describes the rules for selecting source and destination IPv6 addresses, and indicates that applications should be able to reverse the sense of some of the address selection rules through some unspecified API. However, no such socket API exists in the basic (RFC 3493) or advanced (RFC 3542) IPv6 socket API documents.  This document fills that gap partially by specifying new socket-level options for source address selection and flags for the getaddrinfo() API to specify address selection based on the source address preference in accordance with the socket-level options that modify the default source address selection algorithm.  The socket API described in this document will be particularly useful for IPv6 applications that want to choose between temporary and public addresses, and for Mobile IPv6 aware applications that want to use the care-of address for communication.  It also specifies socket options and flags for selecting Cryptographically Generated Address (CGA) or non-CGA source addresses.  This memo provides information for the Internet community. Informational

RFC 5018 Connection Establishment in the Binary Floor Control Protocol (BFCP)
This document specifies how a Binary Floor Control Protocol (BFCP) client establishes a connection to a BFCP floor control server outside the context of an offer/answer exchange.  Client and server authentication are based on Transport Layer Security (TLS). Standards Track

RFC 5019 The Lightweight Online Certificate Status Protocol (OCSP) Profile for High-Volume Environments
This specification defines a profile of the Online Certificate Status Protocol (OCSP) that addresses the scalability issues inherent when using OCSP in large scale (high volume) Public Key Infrastructure (PKI) environments and/or in PKI environments that require a lightweight solution to minimize communication bandwidth and client-side processing. Proposed Standard Protocol.

RFC 5022 Media Server Control Markup Language (MSCML) and Protocol
Media Server Control Markup Language (MSCML) is a markup language used in conjunction with SIP to provide advanced conferencing and interactive voice response (IVR) functions.  MSCML presents an application-level control model, as opposed to device-level control models.  One use of this protocol is for communications between a conference focus and mixer in the IETF SIP Conferencing Framework. Informational

RFC 5029 Definition of an IS-IS Link Attribute Sub-TLV
This document defines a sub-TLV called "Link-attributes" carried within the TLV 22 and used to flood some link characteristics. Proposed Standard Protocol.

RFC 5061 Stream Control Transmission Protocol (SCTP) Dynamic Address Reconfiguration
A local host may have multiple points of attachment to the Internet, giving it a degree of fault tolerance from hardware failures.  Stream Control Transmission Protocol (SCTP) (RFC 4960) was developed to take full advantage of such a multi-homed host to provide a fast failover and association survivability in the face of such hardware failures. This document describes an extension to SCTP that will allow an SCTP stack to dynamically add an IP address to an SCTP association, dynamically delete an IP address from an SCTP association, and to request to set the primary address the peer will use when sending to an endpoint. Proposed Standard Protocol.

RFC 5062 Security Attacks Found Against the Stream Control Transmission Protocol (SCTP) and Current Countermeasures
This document describes certain security threats to SCTP.  It also describes ways to mitigate these threats, in particular by using techniques from the SCTP Specification Errata and Issues memo (RFC 4460).  These techniques are included in RFC 4960, which obsoletes RFC 2960.  It is hoped that this information will provide some useful background information for many of the newest requirements spelled out in the SCTP Specification Errata and Issues and included in RFC 4960.  This memo provides information for the Internet community. Informational

RFC 5072 IP Version 6 over PPP
The Point-to-Point Protocol (PPP) provides a standard method of encapsulating network-layer protocol information over point-to-point links.  PPP also defines an extensible Link Control Protocol, and proposes a family of Network Control Protocols (NCPs) for establishing and configuring different network-layer protocols.

This document defines the method for sending IPv6 packets over PPP links, the NCP for establishing and configuring the IPv6 over PPP, and the method for forming IPv6 link-local addresses on PPP links.

It also specifies the conditions for performing Duplicate Address Detection on IPv6 global unicast addresses configured for PPP
links either through stateful or stateless address autoconfiguration.

This document obsoletes RFC 2472. Draft Standard Protocol

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