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Re: Gratuitous syn/ack
- From: Joel Esler
- Date: Thu Nov 11 20:05:20 2010
I am betting backscatter.
Sent from my iPhone
On Nov 11, 2010, at 5:31 PM, Pete Carah <pete@altadena.net> wrote:
> I'm seeing a significant number (about 1/minute 24 hr/day) of syn/ack
> packets coming from port 80 of random addresses to random ports on my
> nameserver and a few other systems. This isn't enough traffic to be
> really annoying, but is curious.
>
> I wonder if the simple explanation (backscatter from syn floods with
> spoofed source addresses) is more likely, or if there are some probing
> techniques in "normal" use that use these packets (one could accomplish
> a traceroute using port 80 packets in either direction...)
>
> -- Pete
>
>
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