Organization for Transformative Works – dedicated to protecting the expression of fan fiction, fan art, etc. (via Naomi Novik)

Open Standards, One Web, and Opera – Just why are standards important, anyway? (via Opera Watch)

Speaking of Opera, their EU antitrust complaint against Microsoft has been making waves. Responses at CSS3.info, Web Standards Project, Slashdot (edit: more Slashdot), Asa Dotzler, Opera Watch, plus a Q&A w/ Haarvard. My take: Good luck on unbundling, but if they can force Microsoft to catch up with the rest of the market in terms of standards support, I’m all for it.

Nissan vs. Nissan. On my way to work I saw a bumper sticker on an XTerra that said “In support of our freedom, it’s my last Nissan.” Huh? There was clearly a web address below it, but it was too small to read at that distance. So I looked up the phrase, and apparently there’s been a long-running dispute over the domain name nissan.com, between a small computer business named after its founder, Uzi Nissan, and the Nissan car company. The dispute was eventually resolved (correctly, IMO, since he has a legit reason to use the name) in favor of the little guy. On the other hand, I don’t see why the site makes such a big deal about Nissan’s “French Connection” to Renault.

I recently noticed that the mail server was experiencing 4 times the typical number of SMTP connections. It didn’t seem to be under any stress, though, not as far as server load went. So I watched the log file trail, and saw a bunch of messages coming in to nonexistent users with the pattern, FirstnameLastname@alternativebrowseralliance.com.

My first thought was that someone was running a dictionary attack against the domain, trying many different addresses to see which might be valid. Then I noticed that they seemed to be coming from <> — in other words, they were bounce notices.

Great. A Joe Job.

I enabled a catch-all temporarily. That did cause the server to slow down, as it was now actually processing the quadruple load instead of kicking back 3/4 of it with a “User unknown” error. (I hadn’t thought to disable spam scanning on the domain first.) In the 30 seconds before I turned it off again, it picked up 25 non-delivery notices. And those are just the ones that got past the spam filter.

As it turned out, they were just random junk. Some spammer had picked the domain and was using it to forge random From: addresses, and we were getting the bounces. In the old days they made up the whole address, but it’s easy to check whether a domain exists. So now they pick some real domain and make up a fake address. That’s harder to detect unless the domain in question uses some sort of verification system like SPF or DKIM.

So it wasn’t a Joe Job: no one was trying to besmirch the site’s reputation. It still meant extra traffic to the mail server, though.

This problem is called backscatter, and it exists for two reasons:

  1. The sender address on an email message is easy to forge, like writing a fake address on an envelope.
  2. Many mail systems will accept a message first, then process it. If it then decides to reject it, it can’t respond to the actual sender, only to the one listed in the message—and in the case of spam, it’s usually forged (see #1).

I don’t send any mail using the domain. The only reason it even has mail pointed anywhere is so that I can receive mail sent to the webmaster for the Alternative Browser Alliance. I suppose I could set up a -all (no servers are authorized) SPF record, and hope some recipients decide not to send bounces. But I’m not sure how much it would actually accomplish.

Anyway, the two lessons to take away from this are:

  • Reject messages to bad recipients in the initial SMTP transaction. It’ll protect your server from backscatter (and dictionary attacks), because you won’t have to queue and process all the extra junk.
  • Don’t generate bounce messages after the fact based on something as easily forged as the supposed sender. Otherwise, you’ll be contributing to backscatter.

The Internet Storm Center has an insightful response to the statement, “There is nothing on my computer that a hacker would be interested in.” Let’s leave aside the question of your personal data for the moment. Just the fact that you’ve got a computer with an internet connection could prove very useful to someone who wants to cover their tracks or just add more power to their own distributed system.

Amazon KindleAmazon’s entire home page is currently taken up by the announcement of their new eBook reader, Kindle. At $400 I’m not going to rush out and buy one, but it looks like they’ve solved some of the main e-book problems: it’s small, light and wireless, and they even bring up the reading-in-bed issue in the intro.

The real question is going to be compatibility & openness: It’ll read plain text, HTML, Word, and a few other document formats (and they’re promoting its access to Wikipedia), so it should be possible for other stores to sell books for the device.

And what about the e-book offerings themselves? Will they be loaded down with draconian digital rights management like the Adobe ebooks of a few years ago, or are they following the model of Amazon’s MP3 store?* In a nice change, their music downloads are entirely DRM-free and they use it as a selling point. Edit: Per Andrea’s comments and further research, Kindle ebooks are locked down with DRM. No, thanks!

The name, however, makes me wonder how soon they’ll offer Fahrenheit 451.

* Amazon’s MP3 store is also surprisingly cheap. I replaced my old tapes of the original cast recordings of Les Misérables (Broadway) and Phantom Of The Opera for $9 each—they run upwards of $30 on CD.

Bad Behavior and Spam Karma do a good job of fighting most of the spam that hits this site, but over the last few weeks I’ve seen a (relatively) new kind that seems to require manual intervention: pingback spam.

It took a long time for spammers to really start abusing pingbacks, because of two things: First, pingbacks require the remote site to link to your site before they can get you to link to theirs. Second, it was just so much easier to abuse trackbacks and ordinary comments. I guess those have gotten locked down enough that it’s worth the effort to target pingbacks now. Continue reading

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