I-D ACTION:draft-ietf-v6ops-scanning-implications-00.txt

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This draft is a work item of the IPv6 Operations Working Group of the IETF.

	Title		: IPv6 Implications for Network Scanning
	Author(s)	: T. Chown
	Filename	: draft-ietf-v6ops-scanning-implications-00.txt
	Pages		: 11
	Date		: 2006-6-21
	
The 128 bits of IPv6 address space is considerably bigger than the 32
bits of address space in IPv4.  In particular, the IPv6 subnets to
which hosts attach will by default have 64 bits of host address
space.  As a result, traditional methods of remote TCP or UDP port
scanning to discover open or running services on a host will
potentially become far less computationally feasible, due to the
larger search space in the subnet.  This document discusses that
property of IPv6 subnets, and describes related issues for site
administrators of IPv6 networks to consider, which may be of
importance when planning site address allocation and management
strategies.  While traditional port scanning probes (whether by
individuals or automated via network worms) may become less common,
administrators should be aware of other methods attackers may use to
discover IPv6 addresses on a target subnet, and take appropriate
measures to preempt these.


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