On the Implementation of the TCP Urgent Mechanism

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Publisher: IETF
Doc Type: Standard
Pages: 12
Abstract: This document analyzes how current TCP implementations process TCP urgent indications and how the behavior of some widely deployed middleboxes affects how end systems process urgent indications. This document updates the relevant specifications such that they accommodate current practice in processing TCP urgent indications, raises awareness about the reliability of TCP urgent indications in the Internet, and recommends against the use of urgent indications (but provides advice to applications that do). [STANDARDS-TRACK]
Publication Date: 2011-01-01
Status Note: Proposed Standard
DOI: 10.17487/RFC6093
Link: https://doi.org/10.17487/RFC6093
Author(s): Fernando Gont
Andrew Yourtchenko
Keyword(s): TCP

Latest version of IETF RFC 6093

Document Versions — IETF RFC 6093

▶ IETF RFC 6093 (2011-01-01)

THIS DOC [SUPERSEDED] [LATEST VERSION]

Superseded by:

IETF RFC 9293 [Active*]

Normative Reference(s)

IETF RFC 793 [Superseded*]
IETF RFC 1011 [Active*]
IETF RFC 1122 [Active*]
IETF RFC 2119 [Active*]

Bibliographic Reference(s)

The OpenBSD project, " http://www.openbsd.org ". EXTERNAL
Microsoft Windows 95, " ftp://ftp.demon.co.uk/pub/ mirrors/win95netfaq/faq-c.html ". EXTERNAL
The NetBSD project, " http://www.netbsd.org ". EXTERNAL
Microsoft Windows 2000, " http://technet.microsoft.com/ en-us/library/bb726981(printer).aspx". EXTERNAL
Stevens, W., "UNIX Network Programming, Volume 1. Networking APIs: Sockets and XTI", Prentice Hall PTR, 1997. EXTERNAL
The FreeBSD project, " http://www.freebsd.org ". EXTERNAL
The Linux Project, " http://www.kernel.org ". EXTERNAL
Gont, F., "Security Assessment of the Transmission Control Protocol (TCP)", " http://www.cpni.gov.uk/ Docs/tn-03-09-security-assessment-TCP.pdf ", 2009. EXTERNAL
Ko, Y., Ko, S., and M. Ko, "NIDS Evasion Method named "SeolMa"", Phrack Magazine, Volume 0x0b, Issue 0x39, Phile #0x03 of 0x12 http://www.phrack.org/ issues .html?issue=57&id=3#article, 2001. EXTERNAL
Cisco PIX, " http://www.cisco.com/en/US/docs/security/ asa/asa70/command/reference/tz.html#wp1288756 ". EXTERNAL
IETF RFC 854 [Active*]
IETF RFC 959 [Active*]

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doi: 10.17487/RFC6093
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Referenced By

IETF RFC 9293 [Active*]