nanog mailing list archives

Re: NYT covers China cyberthreat


From: Adele Thompson <paigeadele () gmail com>
Date: Tue, 26 Feb 2013 22:24:25 -0800

On Tue, Feb 26, 2013 at 8:39 AM, Kyle Creyts <kyle.creyts () gmail com> wrote:

I think it is safe to say that finding a foothold inside of the United
States from which to perform/proxy an attack is not the hardest thing
in the world. I don't understand why everyone expects that major
corporations and diligent operators blocking certain countries'
prefixes will help. That being said, you make a solid point to which
people should absolutely listen: applying an understanding of your
business-needs-network-traffic baseline to your firewall rules and
heuristic network detections (in a more precise fashion than just "IPs
from country $x") is a SOLID tactic that yields huge security
benefits. Nobody who cares about security should really be able to
argue with it (plenty of those who care don't will hate it, though),
and makes life _awful_ for any attackers.

On Tue, Feb 26, 2013 at 3:43 AM, Rich Kulawiec <rsk () gsp org> wrote:
On Thu, Feb 21, 2013 at 11:47:44AM -0600, Naslund, Steve wrote:

[a number of very good points ]

Geoblocking, like passive OS fingerprinting (another technique that
reduces attack surface as measured along one axis but can be defeated
by a reasonably clueful attacker), doesn't really solve problems, per se.
If you have a web app that's vulnerable to SQL injection attacks, then
it's still just as hackable -- all the attacker has to do is try from
somewhere else, from something else.

But...

1. It raises the bar.  And it cuts down on the noise, which is one of the
security meta-problems we face: our logs capture so much cruft, so many
instances of attacks and abuse and mistakes and misconfigurations and
malfunctions, that we struggle to understand what they're trying to tell
us.  That problem is so bad that there's an entire subindustry built
around the task of trying to reduce what's in the logs to something
that a human brain can process in finite time.  Mountains of time
and wads of cash have been spent on the thorny problems that arise
when we try to figure out what to pay attention to and what to ignore...
and we still screw it up.  Often.

So even if the *only* effect of doing so is to shrink the size of
the logs: that's a win.  (And used judiciously, it can be a HUGE win,
as in "several orders of magnitude".)  So if your security guy is
as busy as you say...maybe this would be a good idea.

And let me note in passing that by raising the bar, it ensures that
you're faced with a somewhat higher class of attacker.  It's one
thing to be hacked by a competent, diligent adversary who wields
their tools with rapier-like precision; it's another to be owned
by a script kiddie who has no idea what they're doing and doesn't
even read the language your assets are using.  That's just embarassing.

2. Outbound blocks work too, y'know.  Does anybody in your marketing
department need to reach Elbonia?  If not, then why are you allowing
packets from that group's desktops to go there?  Because either
(a) it's someone doing something they shouldn't or (b) it's something
doing
something it shouldn't, as in a bot trying to phone home or a data
exfiltration attack or something else unpleasant.  So if there's
no business need for that group to exchange packets with Elbonia
or any of 82 other countries, why *aren't* you blocking that?

3. Yes, this can turn into a moderate-sized matrix of inbound and
outbound rules.  That's why make(1) and similar tools are your friends,
because they'll let you manage this without needing to resort to scotch
by 9:30 AM.  And yes, sometimes things will break (because something's
changed) -- but the brokeness is the best kind of brokeness: obvious,
deterministic, repeatable, fixable.

It's not hard.  But it does require that you actually know what your
own systems are doing and why.

4. "We were hacked from China" is wearing awfully damn thin as the
feeble whining excuse of people who should have bidirectionally
firewalled
out China from their corporate infrastructure (note: not necessarily
their public-facing servers) years ago.  And "our data was exfiltrated
to Elbonia" is getting thin as an excuse too: if you do not have an
organizational need to allow outbound network traffic to Elbonia, then
why the hell are you letting so much as a single packet go there?

Like I said: at least make them work for it.  A little.  Instead of
doing profoundly idiotic things like the NYTimes (e.g., "infrastructure
reachable from the planet", "using M$ software", "actually believing that
anti-virus software will work despite a quarter-century of uninterrupted
failure", etc.).  That's not making them work for it: that's inviting
them in, rolling out the red carpet, and handing them celebratory
champagne.

---rsk




--
Kyle Creyts

Information Assurance Professional
BSidesDetroit Organizer



I've been doing some thinking about the internet tonight and came across
this e-mail by which I am intrigued. Currently we suffer from DDoS downtime
on Rackspace (granted it's a very small amount of time, its a hit to our
only single point of failure for which I am currently trying to solve by
obtaining a /24 and an anycast address as a means of mitigation and
providing a highly available HTTP cluster of load balancers. I can't help
but wonder if the cost (both in ipv4 resources and cash) outweighs the
worth of an environment that is sanctioned from the globe. While cloud
hosting has proven to be a scalable solution for our needs, we currently
are only serving US-based organizations as far as I know. Even so, the
desire to grow beyond that isn't far fetched when adding networks that are
still segregated from access outside of a country becomes more available
(kinda like vlans.)




Germany, Russia, and Spain.

"IN vain is the net spread in the sight of anybird," especially if the
bird be as keen-eyed asPrince Bismarck. The Carlist attempts to irritateGermany
into intervention —whether by

firing on her gunboats, or, as report says,attempting to take prisoners
the German andAustrian representatives to Madrid in the courseof their
railway journey, or by any other means—have been, and will be, failures.
Prince Bismarck knows as well as anybody that nothingwould give so
effectual a spur to the Carlistcause as a German intervention against it,
andwe may therefore well believe his organ when ittells us that nothing
so wild as the project oflanding German troops in Spain was ever contemplated
by him. Prince Bismarck was wiseenough, even during the war with France,
whenthe German power was already in possession,and was on the spot, to
avoid anythinglike taking a part between the differentpolitical factions
into which France was divided.Is it reasonable to suppose that, after
keeping socarefully out of the net with which his feet werealmost in
contact in France, he would allow himself to be entangled in it in Spain
? The realdanger on the Franco-Spanish frontier is not ofa German
intervention in Spain, but of jealousiesgrowing up between Germany and
France sokeen as to render a renewal of the war all butinevitable. No
doubt that would suit PrinceBismarck's book much better than a barren
intervention in Spain. No doubt his agents are notparticularly delicate
in their modes of insistingthat France shall cut off all supplies from theCarlist
forces, and in indirectly reminding Frenchmen of the difference beween
their position now,when they are kept to their internationalduties
towards Spain by the watchful eye ofGermany, and their position four yearsago,
when they made the mere suggestion of aGerman candidate for the throne of
Spain aground of affront, and ultimately a cause of war.We do not suppose
that Prince Bismarck wishesfor another big war, and all the new odium itwould
bring on the victor, but if it must come,no doubt he would like it to
come soon. It wasa good notion of his to pose as the protector ofthe
regency of Marshal Serrano in Spain, and sowin an ally south of the
Pyrenees, as well assouth of the Alps. But in spite of his no doubtsincere
wish to see Ultramontanism defeated inthe defeat of Don Carlos, it is
pretty certainthat his Spanish policy is studied much morewith a view to
crippling France, than with aview to crippling Rome.There is indeed
something encouraging in theclear evidence afforded, both by Prince Bismarck's
and by Prince GortschakofTs policyin regard to Spain—though these
policies aredifferent -that even the least teachable of thegreat European
Powers have learned the lessonthat interventions for the purpose of
settling theinternal disputes of any great nation are thesilliest of
mistakes. Germany has recognised,and has probably persuaded various other
greatPowers to recognise, the Government of Madrid,while Russia declines
to recognise it; but evenRussia carefully explains that her reason for
holding back is not any wish to strengthen the hopes ofthe Carlist
insurrection, but rather on even greaterdelicacy than that shown by the
other Powersfor the free choice of the Spanish nation, and areluctance
therefore to enter into formal relations with a Government which, since
GeneralPavin's coup Witat, has had no sanctionfrom the will of the
people. Nodoubt one may fairly smile at the reasongiven, when it comes
from the Ministerof Russia. No doubt it is quite natural to suspect that
other motives mingle with the refusal—the dislike to follow implicitly
German lead—the uueasiuess lest the example of Spain shouldbe eventually
pleaded for Republican institutions;but even though it be so, the fact
remains thatRussia offers an almost pedantically constitutional reason
for refusing to acknowledge as yetthe Government of Marshal Serrano, and
wishesto be understood as setting an example of evengreater delicacy and
greater deference to thewishes of the Spanish nation than either GreatBritain
or France. No doubt Russia Las pushedthe doctrine to an extreme, if she
has allowedher deference to the wishes of the Spanishpeople to prevent
her from recognising a Government the continuance of which she would thinka
great safeguard to the peace of Europe. Inpoint of fact, Russia, in all
probability, holds nosuch opinion. The Greek Church is too wellestablished
and too popular in Russia to makeit a matter of any account to her
whether thenew Government of Spain be Ultramontane orotherwise, while it
can never be a matter ofabsolute indifference to the Czar of Russiawhether
another European people throws offthe monarchy or not. If Don Carlos were
tosucceed, at least the Republican current ofevents would be reversed for
a time. Butwhether the success of Marshal Serrano willmean a Republican
or a Throne for Spain is amatter extremely doubtful. On the otherhand, to
neither Germany, nor England, norItaly can it fail to be a matter of some
interestwhether or not a new stimulus or a new checkis to be applied to
Ultramontane zeaL And asregards France, the Government of MarshalMacMahon
has a very difficult problem to solve.Doubtless the Extreme Right, and
with theExtreme Right the whole Sacerdotal party,would prefer to see Don
Carlos succeed, sincesuch a success would be a new ground of hopefor
Henri V. and the white flag. But thenMarshal MacMahon has been obliged to
quarrelwith the Extreme Right, who make light of hisSepteunate, and
affect to treat him as a merelocum tenena for the coming king. Hence it isessential
for him to secure a certain amount ofmoderate Liberal support, and the
regency ofMarshal Serrano is so very homogeneous a kindof power to his
own—namely, a mere excuse fordelay—that he can hardly fail to feel a
certainsympathy with its position. Add to this theextreme desirability of
conceding to Germanyall that can be conceded while the fears of quarreland
the occasions of quarrel are still so numerous,and we do not doubt that a
very wise decision hasbeen taken, even in the interest of the Government
itself, in recognising the de facto Government of Madrid. On the whole,
we regard itas a very satisfactory evidence of the progressmade in
mastering elementary Constitutionalideas, eveu by the most despotic
Powers, thatall the great Powers alike repudiate intervention
Fix this text<http://trove.nla.gov.au/ndp/del/captchaForm?target=ocr&t=1361946009073>
in Spain, and use even their fair privilege ofgiving a sort of moral
support to that one ofthe rival Governments which they think be3tcalculated
to maintain the peace of Europe, withgreat reserve and moderation. The
day of HolyAlliances to mould the internal institutions ofrefractory
countries is now, at last, probablypast, aud with these, the day of some
of themoot mischievous European combinations whichthe world has ever
seen.— Spectator.

It is learned that the arrest of Count YonAmiin was effected without the
knowledge of theEmperor. The musing documents hare beengiven to the
Ultraniontanes by Deputy Windernorst.



Current thread: