Security Incidents: Re: Weird DNS scans

[Ryan Russell <ryan () securityfocus com>]

On Fri, 5 Oct 2001, Seth Milder wrote:

> I am getting a ton of DNS scans from what seem to be all BSDI machines
> and all from China (so far). They are also *all* running
<SNIP>
> Remote operating system guess: F5labs Big/IP HA TCP/IP Load Balancer
There's you answer right there.  They're F5 BigIP boxes.  when you visit a
site that uses them, they do some DNS queries to determine which of their
servers you're closest to.

                                        Ryan


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