Antiantisocial Networks

Today TechCrunch reported on a paper describing a way to use Facebook for malicious means.  The paper describes a DDoS attack that can be done, leveraging the large number of users of an application to attack a victim site.

While this attack vector is legitimate, I see a number of things that make it inherently infeasibly, and don’t think it really warrants being called a “FaceBot” (implying similar power to a botnet).

In order to create an application, one obviously needs to create a Facebook account, though that can be done anonymously.  The real issue is that in order to execute such an attack, one would need to make an application that is incredibly popular.  The attacker would need to devote a large number of resources to keeping such a popular app up, which would all need to be done anonymously (though would need to be paid for in one way or another).

Let’s say an attacker has gone through all of this to make a popular application: why doesn’t he/she just use those resources for a direct attack?  One possibly answer is that the Facebook DDoS would be hard to shut down, or better in some other way in executing the attack.  This is false because as soon as someone realizes that their traffic is coming from Facebook (whether by referrers, or FB trying to pull images for its cache, or some other mechanism), it can in most instances be stopped immediately, especially considering how most Facebook calls to other sites include the application’s API keys.  Even barring that, IP addresses and Facebook’s logging can be used to determine what application a user was in when they requested the victim’s site.

Additionally, DDoSs using this attack vector are relatively easy to mitigate.  If a hacker already has all of these resources dedicated to keeping an application up, why wouldn’t they just launch a TCP SYN flood or similar lower-level attack, much more potent DoSs, even if launched from a more limited IP range.

Let’s take a different route: suppose a hacker attacks one of Slide’s applications and somehow manages to break in and add an attack iframe.  This is a completely legitimate and anonymous way of attacking a site (though it begs the question of why the hacker didn’t just break into the target site in the first place, assuming both have similar levels of security).  While this is a legitimate issue, the same holds true for all websites.  Should someone hack into Yahoo! and figure out how to deploy a new home page (somewhere between almost-impossible and no-freaking-way on the difficulty scale), almost any site on the internet could easily be taken down.  I certainly hope top app developers take security as seriously as top website owners, but this is nothing special for Facebook.

On the topic of information theft, this is why Facebook requires you to explicitly permit an application to access your information.  The concept of an API implies this potential for theft…users are trusting applications to access their information and not keep it.  There is no way to prevent this for the same reason DRM doesn’t work: if people can view things they can store things.  While this is a legitimate concern, again it is nothing new, and not much can be done about it short of user education.

How Not to Satisfy Your Customers

So seeing as how my summer is just about over, I had a bunch of things to wrap up.  One of them was canceling my Comcast subscription.  I called them and setup the cancellation.  A few days later I got a call from a representative “confirming” that I really wanted to cancel.  I said yes, I was moving out of their service area, and they told me that they would note that on the account.

Then I flew to Whistler, Canada for Firefox+ Summit 2008, where the calls are outrageous, so I didn’t answer my phone.  Here’s my call log from that trip (note that Whistler is the same timezone as Mountain View):

  • Jul 31, 6:08 am – Comcast
  • Jul 31, 1:23 pm – Comcast
  • Aug 1, 10:45 am – Comcast
  • Aug 1, 1:53 pm – Comcast
  • Aug 2, 7:30 am – Comcast

Aug 4 I was back stateside so I could answer my phone.  Just like clockwork, at 7:21 am I got another call from Comcast.  This time I was a little more stern in my request to not be called again (though still polite, I can’t blame that particular phone rep for anything), and lo and behold, they actually stopped calling.

I’m going to assume the first rep forgot to mark my cancellation confirmed and ignore that, but what the hell is with this policy?  Not only do they call at ungodly hours (can’t they do timezone conversions there?), but they kept calling back every single day.  I told them I wanted to cancel, were they really that desperate to make sure I wanted to?

It’s been a pretty bad week for me and customer service…before I cancelled Comcast, I called XBox Live to cancel that.  I got a notice via email that my subscription (which I only took our for Eric to use this summer) was going to be automatically renewed, and to make sure that my payment info was up to date.  I searched through that site for a good 15 minutes…there is no mechanism or instruction on how to cancel your subscription.  I’m sure this was done for retention purposes, since a cancel option is usually pretty standard for a web interface, but I suppose it’s way too easy to allow people to cancel in less than 20 minutes.

So I hunted down a phone number and called them, got transfered around, and finally found someone who could cancel my account.  I had to guide the rep through the “customer retention” script, where he kept asking me if there was anybody I could transfer the account to or another XBox I could recover the account on, and I kept having to remind him that all of my friends had Live accounts, and I still owned an XBox.  They may as well have a machine play the script, they read each line regardless of context.  In fact. most big companies do that.


Live From f8

I’m sitting here in a front-row seat for the f8 keynote.  I’ll be keeping this post updated as interesting things happen…so stay tuned!

1:29 pm: Waiting for the talk to start…great seat!  Music is good but a little loud 😛

1:35 pm: Music out, Zuck in.  That is an amazingly hi-res projector!

1:36 pm: FB has been learning how to work with developers, made some mistakes along the way.

1:39 pm: FB mission: “Give people the power to share and make the world more open and connected.”

1:42 pm: 24mil users at f8 ’07, 90mil users now.  f8 ’07 US/International ratio was 50/50, now more like 30/60

1:44 pm: Opening up translation tool for platforms, they can use FB’s users to translate apps.

1:45 pm: Over 400k developers, more than half outside the US.

1:48 pm: Top 5k bands have more fans on iLike than anywhere else (including MySpace Music).  Causes app has more users than Al Gore’s alliance campaign (the two have since merged).

1:49 pm: Over 30 different developers have been funded to develop FB apps.  Flixter got $6m and Zynga raised $29mil just this morning.

1:54 pm: Lessons learned: Need to work more closely with developers.  Need to align incentives better, reward good apps, punish bad apps.

1:56 pm: Walking us through new FB, explaining the new Wall.

2:04 pm: “We’ll do it live!”, giving us a live tour of the new feed.

2:10 pm: Talking about the decentralization of social networking, comparing the social network movement to the PC movement.  FB expects in a few years all good applications and uses will come from sources other than FB, just utilizing their platform.

2:13 pm: FB Connect: Goals: Build the same kinds of apps across the web, share info across the web, control your info across the web.  3rd party sites can use it to pull profile info, friend lists, etc.  You can also send FB hashes of your users emails and it will tell you if they are FB users.

2:15 pm: “It goes to their profile, and Christmas is ruined.”  Zuck has a sense of humor…nice!

2:18 pm: Someone from Digg is on stage to demo the Digg/FB Connect inegration, nice, clean, and simple.

2:20 pm: Six Apart is next, demoing comment authentication with FB Connect, followed by Citysearch for reviews & recommendations.

2:26 pm: Profile is being rolled out over time, FB Connect Beta is today.

2:27 pm: That’s it for Zuck.  Ben Ling takes the stage.

2:32 pm: They had a slide that lists universities researching FB Apps…they used a logo from Central Michigan University instead of Carnegie Mellon!!!

2:38 pm: Talking about what makes great apps, building trust, etc.

2:46 pm: Talking about partnerships with MS, Joyent, and AWS.  New Developer Website (about time!).  Also promising to build up a team to work more closely with the community.  Applause for initial fbFund recipients, discussing Connected Weddings as an example.

2:48 pm: New program: giving out $2mil over the next 2 months.  25 finalists get $25k, 5 finalists (voted by community) get $250k.

2:49 pm: Announcing FB Verification program: Apps that feel they are Secure, Respectful, and Transparent can apply and be verified (they get a badge).  Verified apps get more visibility on the site.

2:50 pm: Announcing FB Great Apps program: Apps that feel they are super-awesome (10 criteria + history of adherence to policies + minimum user base).  Great Apps are more integrated and more trusted, as well as getting early access to new features and feedback directly from FB.  iLike & Causes are the first 2 Great Apps, though the program is in Alpha.

2:53 pm: Talking about a more transparent and consistant process for enforcing abuse policies.

2:56 pm: FB Connect will be released for Desktop, Web , and Mobile (they have an iPhone Cocoa API).

2:58 pm: FB Connect launches full on next summer.  There’s a hackathon today running until 9pm, winners announced at 11pm.  That’s all :).

Facebook: Sea Cow of the Internet

Update: Schrep (I’m far back right, he’s in the middle…note the ripped shirt, sorry Schrep!) was kind enough to point out that, as of bug 423377 being resolved, Firefox 3 defaults to 6 simultaneous connections.  Modern browsers all use different numbers, the lowest being IE 7 with 2 (all older browsers also use 2).

One of my projects here at Mozilla (and, coincidentally, a past project at Yahoo!) was improving ySlow scores.  ySlow is a utility that measures load time and analyzes page performance, assigning you a final letter grade based on various performance metrics.  It’s a neat little Firebug plugin, and I highly suggest that any web developer install it.

Occasionally I like to play with this tool on other big sites, just to see how many of them actually care about such things.  So I went through and ran ySlow on some of the more common Facebook pages.  Here’s what I found:

With most aspects Facebook does a decent job: with the exception of advertiser scripts and some application-specific code they use etags, minify their JS, and use long expires headers.  What amazed me is the number of JS and CSS files on each page, all listed one after another in the header:

Page JS Files CSS Files CSS BG Images
Homepage (logged out) 5 5 14
home.php 23 24 32
profile.php 26 21 36
photo_search.php 11 7 23
photo.php 18 8 26
friends 15 13 34

And for those curious, here’s the count for the new facebook design (summary: significantly worse):

Page JS Files CSS Files CSS BG Images
home.php 27 24 60
profile.php 45 13 67
photo.php 25 9 46
friends 26 19 57

Really, I can’t think of any context in which 47 external files would be necessary! I understand breaking files up by purpose to make coding and revision management easier, but I wonder if someone at some point considered the speed impacts. I’m fortunate enough to almost always have a broadband connection, but the experience for their dial-up users is probably deplorable. Especially considering that they now localize the site and are pushing to expand overseas, you would think this would be a much higher priority. And don’t even get me started about the lack of spriting!

Here’s how I setup Mozilla’s JS/CSS concatenation (see the Build Process):

  1. Add a configuration setting for site state (example: a flag set to “production” on production servers, “dev” on everything else)
  2. All CSS/JS calls use these flags to decide if they go to the concatenated files or the actual development files
  3. Create a build script that generates the concatenated files (profile.js, photo.js, etc), run before pushing to production

Ironically enough I would bet Facebook already has #1 and #2 setup, since they use Akamai for production servers, and can’t use that for development.

Alternatively they could use the method YUI uses for serving JS files.  Basically call a script that will return the concatenated files.  It’s a less elegant solution, and is heavier on the server, but still better than nothing.

Note that this doesn’t only affect dial-up users.  While broadband users usually have a fast enough connection to offset the slowdown, a large file count is the biggest slowdown for broadband.  This is because of the 2-simultaneous-connection limit that most browsers obey.  From rfc2068:

Clients that use persistent connections SHOULD limit the number of simultaneous connections that they maintain to a given server. A single-user client SHOULD maintain AT MOST 2 connections with any server or proxy. is the 8th most popular site on the web, while is the 258th (note that this is all of, not just  They should be able to devote a lot more to the tail end of their users, especially considering the residual benefits for their main audience.

Just as bad is their lack of proper fallback for those with JS disabled. For example, if you were to disable JS, you can still login fine, but once you login, head back to That’s right, they use JS to redirect users from their homepage, with no <noscript> fallback, meaning the average joe with JS disabled can easily lock himself out of Facebook.  In addition, pretty much every new feature added since poking doesn’t have a non-JS fallback.  Status updates, “People you may know”, dropdowns, the entire “Friends” page, and so on.  All completely useless.

The Internet and Thought

When I find myself thinking about something often, something that bothers me, I have the strange habit of Googling it.

I just realized that I do it, because normally when I’m deep in thought I just happen to be sitting at a computer, and I just happen to type something into that oh-so-useful quicksearch bar (apparently I have the ability to surf the net as background noise, much like how people have a TV on in the background, not really listening, but still able to pick up some things).  These thoughts aren’t even necessarily technology-based, they can be about family, relationships, education, or a plethora of other topics.  I’ll dump out a stream of Google searches looking for something interesting, like I’ll find someone who’s already had a similar thought pattern and found the answer for me, or perhaps just for words that will inspire new directions for my thoughts.  Occasionally I find an article on some blog that’s close to what’s on my mind, and it does help clear my thoughts.  More importantly, it answers the question “am I crazy?”, where crazy is defined as being “a minority of one” (as 1984 so eloquently puts it).

This is an interesting connection.  I’ve been told many times that my thought process is different, and I’ve learned that often my train of thought makes no sense to other people (I don’t even try to replay elaborate thought processes anymore).  Finding someone who “gets me” is rare, and usually it will only apply to one particular field.  I find people who “get me” in terms of my views on relationships, family, sex, politics, or technology, but rarely everything or even a majority of things.  Realizing this is a very lonely feeling, especially when you can’t find anyone who understands your views on a particular topic, or can/wants to approach it from a particular angle.  Finding people with similar thoughts validate your own.  Group mentality I suppose…when people agree with you you avoid having to question your beliefs.  The internet has provided a means to find people with similar views, and a lot of the innovations on the web have been at least partially driven by this search.  Forums, search, social networks.  How often does one seek out the those with opposite views for discussions.  Do Firefox fans chat on IE forums?  Do Catholics post to Scientology mailing lists?  With the exception of trolling, I find the answer is overwhelmingly no.  It’s easy to find people who agree with you, and comforting.

So I guess I’ll wrap this up with a couple of questions:

  1. Do you find yourself searching randomly for things that are on your mind? (Ironic how I’m trying to validate my method about how I validate ideas by seeking out others with the same views as me by seeking out others with the same method as me).
  2. Do you ever seek out opposite views for reasons other than amusement or trolling?  Do you do this for things you feel very strongly about, or things you are on edge about?