I-D ACTION:draft-savola-v6ops-6to4-security-02.txt

[[e-mail]]

A New Internet-Draft is available from the on-line Internet-Drafts directories.


	Title		: Security Considerations for 6to4
	Author(s)	: P. Savola
	Filename	: draft-savola-v6ops-6to4-security-02.txt
	Pages		: 29
	Date		: 2003-1-8
	
The IPv6 interim mechanism 6to4 (RFC3056) uses automatic IPv6-over-
IPv4 tunneling to interconnect IPv6 networks.  The architecture
includes Relay Routers and Routers, which accept and decapsulate IPv4
traffic from anywhere.  There aren't many constraints on the embedded
IPv6 packets, or where IPv4 traffic will be automatically tunneled
to.  These could enable one to go around access controls, and more
likely, being able to perform proxy Denial of Service attacks using
6to4 relays or routers as reflectors.  Anyone is also capable of
spoofing traffic from non-6to4 addresses, as if it was coming from a
relay, to a 6to4 node.  This document discusses these issues in more
detail and tries to suggest enhancements to alleviate the problems.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-savola-v6ops-6to4-security-02.txt

To remove yourself from the IETF Announcement list, send a message to 
ietf-announce-request with the word unsubscribe in the body of the message.

Internet-Drafts are also available by anonymous FTP. Login with the username
"anonymous" and a password of your e-mail address. After logging in,
type "cd internet-drafts" and then
	"get draft-savola-v6ops-6to4-security-02.txt".

A list of Internet-Drafts directories can be found in
http://www.ietf.org/shadow.html 
or ftp://ftp.ietf.org/ietf/1shadow-sites.txt


Internet-Drafts can also be obtained by e-mail.

Send a message to:
	[e-mail].
In the body type:
	"FILE /internet-drafts/draft-savola-v6ops-6to4-security-02.txt".
	
NOTE:	The mail server at ietf.org can return the document in
	MIME-encoded form by using the "mpack" utility.  To use this
	feature, insert the command "ENCODING mime" before the "FILE"
	command.  To decode the response(s), you will need "munpack" or
	a MIME-compliant mail reader.  Different MIME-compliant mail readers
	exhibit different behavior, especially when dealing with
	"multipart" MIME messages (i.e. documents which have been split
	up into multiple messages), so check your local documentation on
	how to manipulate these messages.
		
		
Below is the data which will enable a MIME compliant mail reader
implementation to automatically retrieve the ASCII version of the
Internet-Draft.

ftp://ftp.ietf.org/internet-drafts/draft-savola-v6ops-6to4-security-02.txt"><ftp://ftp.ietf.org/internet-drafts/draft-savola-v6ops-6to4-security-02.txt>