BCP38 / RFC2827 were created specifically to address some quite similar problems. And googling either of those two strings on nanog will get you a lot of griping and/or reasons as to why these aren't being more widely adopted :)
--srs On Fri, Sep 3, 2010 at 7:47 AM, Zhiyun Qian <zhiy...@umich.edu> wrote: > Suresh, thanks for your interest. I see you've had a lot of experience in > fighting spam, so you must have known this. Yes, I know this spamming > technique has been around for a while. But it's surprising to see that the > majority of the ISPs that we studied are still vulnerable to this attack. > That probably indicates that it is not as widely known as we would expect. So > I thought it would be beneficial to raise the awareness of the problem. > > In terms of more results, the paper is the most detailed document we have. > Otherwise, if you interested in the data that we collected (which ISPs or IP > ranges are vulnerable to this attack). We can chat offline. > > Regards. > -Zhiyun
