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Re: FW: [Full-Disclosure] Question for DNS pros
From: Frank Knobbe (frankknobbe.us)
Date: Tue Aug 03 2004 - 17:23:16 CDT
On Tue, 2004-08-03 at 15:34, Paul Schmehl wrote:
> Frank, I've only checked two of the "attacking" IPs, but they are both
> BigIP load balancers. I'd bet that they all are, and these packets are
> some sort of probe to see if a host that contacted them before is still
hmm... I think it's a bit early to say that. After all, why doesn't it
contact other systems? Why would it have to recheck in the first place?
And why would it use a) a valid DNS query, b) and obscure, non-standard
SYN packet, and c) a DNS query *specifically* including the "pinged"
hosts' IP address in reverse notation? I strongly doubt that the F5
engineers through *that* would be a good way to see if a host is still
Even if, what would the BigIP gain from it? Nuttin' (as we say here in
The mystery continues...
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