In message <6.0.0.22.2.20031120125430.031eaeb0@LOCALHOST>, "Jared B. Reimer" wr ites:
Greetings.
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