I am also seeing these quite bit on my p2pool box.

Right now it is just a bit of (mostly) harmless spam but in the future I can see this kind of thing being used in DDOS attacks and "deep scans" to gather information to be used to harm the bitcoin network.  We could easily block them but then they would just start to spoof regular clients.

We cannot even authenticate them by asking something that only a full client would know because that would catch out clients sync'ing the blockchain and SPV clients.

I suspect it is something that is going to have to be dealt with in the future (I just don't know how yet).  We could start by dropping connections that send incorrect information (IP addresses of 0.0.0.0 or our own IP).

Neil


On 31 July 2014 01:57, Pieter Wuille <pieter.wuille@gmail.com> wrote:
At least my crawler (bitcoin-seeder:0.01) software shouldn't reconnect
more frequently than once every 15 minutes. But maybe the two
connections you saw were instances?

On Wed, Jul 30, 2014 at 3:50 PM, Wladimir <laanwj@gmail.com> wrote:
>> The version message helpfully tells me my own IP address but not theirs ;p
>
> Try -logips. Logging peer IPs was disabled by default after #3764.
>
> BTW I'm seeing the same abusive behavior. Who is running these? Why do
> the requests need to be so frequent?
>
> Wladimir
>
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