Increase in traffic to/from DSL subs since August?
Steven M. Bellovin
smb at research.att.com
Thu Nov 20 21:28:59 UTC 2003
In message <184.108.40.206.2.20031120125430.031eaeb0 at LOCALHOST>, "Jared B. Reimer" wr
>Another independent ISP operator and I have noticed a pretty significant
>increase in traffic to and from our broadband (DSL) subscribers since
>August. It's been a fairly steady uptick, at least in my case, resulting
>in a doubling of overall average traffic to/from these folks since then.
>Have others seen a similar trend? Any thoughts as to what the cause may
>be? Our best guess a virus/worm, possibly being used as a spam relay or
>other proxy at this point...
At the IETF Plenary, Bernard Aboba showed a graph of spam, with a
marked uptick since SoBig.F in August. My guess is worm-deposited spam
relays, though Joel's guess of Nachi or Welchia can't be ruled out,
either, without flow data.
--Steve Bellovin, http://www.research.att.com/~smb
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