[Bitcoin-development] Abusive and broken bitcoin seeders

Neil Fincham neil at asdf.co.nz
Wed Jul 30 21:03:31 UTC 2014


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 at 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 at 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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