Re: ISP port blocking practice

[Suresh Ramasubramanian <ops.lists () gmail com>]

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 <zhiyunq () 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