[101098] in North American Network Operators' Group
Re: European ISP enables IPv6 for all?
daemon@ATHENA.MIT.EDU (Danny McPherson)
Tue Dec 18 00:59:15 2007
In-Reply-To: <20071218003710.2f0877e3@cs.columbia.edu>
From: Danny McPherson <danny@tcb.net>
Date: Mon, 17 Dec 2007 22:58:28 -0700
To: NANOG <nanog@merit.edu>
Errors-To: owner-nanog@merit.edu
On Dec 17, 2007, at 10:37 PM, Steven M. Bellovin wrote:
>
> On Mon, 17 Dec 2007 15:29:21 -0800
> "Christopher Morrow" <morrowc.lists@gmail.com> wrote:
>
>> how does it improve data security exactly?
>>
> Back in 1994, it was expected to be true because v6 would mandate
> IPsec, and v6 would be deployed long before the installed base of v4
> machines would be upgraded to IPsec. Obviously, that's not what
> happened; while IPsec was indeed late in coming, v6 was even later, so
> the original belief has been OBE. The mythos, however, hasn't caught
> up. Similar statements can be made about stateless autoconfig vs. v4
> DHCP.
Perhaps the concept also holds true because there's a
smaller target market for the moment, and attackers are
all about ROI. We've certainly seen this at other layers of
the stack. However, not sure I'd posit as such.
> In a slightly more realistic vein, a huge address space makes life
> harder for scanning worms. As Angelos Keromytis, Bill Cheswick, and I
> have pointed out, "harder" is by no means equivalent to "impossible",
> but the myth, new as it is, still propagates.
As will the worms and malware, I suppose, though perhaps
with more thought-out propagation vectors that employ not
only local prefix scanning, but nifty things like walking
ip6.arpa or the like for presumable denser host existence.
Then again, who needs self propagation, when client-side
attacks seem to be more than sufficient.
-danny
