New and interesting network abuse.

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1

My apologies if this strays off topic, but I wanted to share my recent
experience.

We had a collocation customer come in and request a t1 of pots lines for
their servers, then complaints that their "security" software wasn't
working because of our RPF checks. As it turns out they were dialing up
to a local isp, and sending bulk email using our bandwidth, but the
dial-up's ip.... And receiving the TCP ack on the dial up.

Very ingenious imho, but I'm not sorry it didn't work out.

Anyone else seen this before?

-Ejay

2

Thread that I just started yesterday about port 25 blocking and if
more ISPs werent doing this bidirectionally.

Which is what your local ISP, and other ISPs that have dialup pools, must do.

--srs

3

Its not new. In fact, its so not new, I think those involved could quite
happily believe its very clever. :slight_smile:

Adrian