I-D ACTION:draft-ietf-nat-protocol-complications-03.txt

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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Network Address Translators Working Group of the IETF.

	Title		: Protocol Complications with the IP Network Address 
                          Translator (NAT)
	Author(s)	: M. Holdrege, P. Srisuresh
	Filename	: draft-ietf-nat-protocol-complications-03.txt
	Pages		: 14
	Date		: 07-Jul-00
	
Many common internet applications can be adversely affected when the
communicating end  nodes are not in the same address realm and seek the
assistance of NAT (enroute) to bridge the realms. NAT by itself cannot
provide the necessary application/protocol transparency in all cases.
Often, a NAT device seeks the assistance of Application Level Gateways
(ALGs) to provide the transparency necessary for each application. The
purpose of this document is to identify the protocols and applications
that cannot function with NAT enroute. The document attempts to identify
the problem cause and describe known work-arounds and the requirements
on the part of ALGs to make the protocols/applications transparent with
NAT enroute. It is impossible to capture all the applications and their
issues with NAT in a single document.  This document attempts to capture
as much information as possible. We hope, the coverage provides
necessary clues for applications not covered by the document.

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