Transmission of Syslog Messages over UDP
RFC 5426
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RFC - Proposed Standard
(March 2009; No errata)
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2015-10-14
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IETF
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RFC 5426 (Proposed Standard)
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Sam Hartman
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Network Working Group A. Okmianski
Request for Comments: 5426 Cisco Systems, Inc.
Category: Standards Track March 2009
Transmission of Syslog Messages over UDP
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (c) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents in effect on the date of
publication of this document (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
10, 2008. The person(s) controlling the copyright in some of this
material may not have granted the IETF Trust the right to allow
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Abstract
This document describes the transport for syslog messages over UDP/
IPv4 or UDP/IPv6. The syslog protocol layered architecture provides
for support of any number of transport mappings. However, for
interoperability purposes, syslog protocol implementers are required
to support this transport mapping.
Okmianski Standards Track [Page 1]
RFC 5426 Syslog UDP Transport March 2009
Table of Contents
1. Introduction ....................................................2
2. Conventions Used in This Document ...............................3
3. Transport Protocol ..............................................3
3.1. One Message Per Datagram ...................................3
3.2. Message Size ...............................................3
3.3. Source and Target Ports ....................................4
3.4. Source IP Address ..........................................4
3.5. UDP/IP Structure ...........................................4
3.6. UDP Checksums ..............................................4
4. Reliability Considerations ......................................5
4.1. Lost Datagrams .............................................5
4.2. Message Corruption .........................................5
4.3. Congestion Control .........................................5
4.4. Sequenced Delivery .........................................5
5. Security Considerations .........................................6
5.1. Sender Authentication and Message Forgery ..................6
5.2. Message Observation ........................................7
5.3. Replaying ..................................................7
5.4. Unreliable Delivery ........................................7
5.5. Message Prioritization and Differentiation .................7
5.6. Denial of Service ..........................................8
6. IANA Considerations .............................................8
7. Acknowledgements ................................................8
8. References ......................................................8
8.1. Normative References .......................................8
8.2. Informative References .....................................9
1. Introduction
Informational RFC 3164 [8] describes the syslog protocol as it was
observed in existing implementations. It describes both the format
of syslog messages and a UDP [1] transport. Subsequently, a
Standards-Track syslog protocol has been defined in RFC 5424 [2].
RFC 5424 specifies a layered architecture that provides for support
of any number of transport layer mappings for transmitting syslog
messages. This document describes the UDP transport mapping for the
syslog protocol.
The transport described in this document can be used for transmitting
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