ISP port blocking practice

Suresh Ramasubramanian ops.lists at
Fri Sep 3 01:19:36 UTC 2010

Zhiyun, this is by far the most comprehensive paper I've seen on
asymmetric routing spam .. a technique that's as old as, for example,
Alan Ralsky.  So been around for about a decade.

Congratulations, great effort.  Do you have more results available (in
more detail than were published in this paper)?  Should be worth


On Fri, Sep 3, 2010 at 3:29 AM, Zhiyun Qian <zhiyunq at> wrote:
> Sorry for bringing this old topic back. But we have made some academic effort investigating the spamming behaviors using assymetric routing (we named it "triangualr spamming"). This work appeared in this year's IEEE Security & Privacy conference. You can take a look at it if you are interested (and feedbacks are welcome):

Suresh Ramasubramanian (ops.lists at

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