[Bitcoin-development] Abusive and broken bitcoin seeders

[Addy Yeow]

I believe the requests Jeff is seeing came from my crawler although anyone
could be running it (https://github.com/ayeowch/bitnodes) since there is no
IP address in the log to confirm the source of the requests.

This is a sample log of an actual request from my crawler at 148.251.238.178
:
*2014-07-30 22:43:54 receive version message: /getaddr.bitnodes.io:0.1/:
version 70001, blocks=313244, us=X.X.X.X:8333, them=0.0.0.0:0
<http://0.0.0.0:0>, peer=148.251.238.178:47635*

Currently, the crawler takes a full snapshot of the network of reachable
nodes as soon as it is done with previous snapshot. I want to be able to
diff between the snapshots to get the join and leave nodes periodically.
Each full snapshot is taken on average between 3 to 4 minutes hence the
requests that you see from the crawler every 3 to 4 minutes.
I have a task in my schedule (
https://github.com/ayeowch/bitnodes/wiki/Schedule#crawlpypingpy) to improve
upon this method by skipping a new connection with currently reachable
nodes while still being able to perform the diff.


On Wed, Jul 30, 2014 at 11:22 PM, Jeff Garzik <jgarzik at bitpay.com> wrote:

> Seeing this on one of my public nodes:
> 2014-07-30 13:13:26 receive version message:
> /getaddr.bitnodes.io:0.1/: version 70001, blocks=313169,
> us=162.219.2.72:8333, peer=11847
> 2014-07-30 13:13:33 receive version message:
> /getaddr.bitnodes.io:0.1/: version 70001, blocks=290000,
> us=162.219.2.72:8333, peer=11848
> 2014-07-30 13:14:21 receive version message:
> /getaddr.bitnodes.io:0.1/: version 70001, blocks=313169,
> us=162.219.2.72:8333, peer=11849
>
> That is abusive, taking up public slots.  There is no reason to
> connect so rapidly to the same node.
>
> Other seeders are also rapidly reconnect'ers, though the time window
> is slightly more wide:
> 2014-07-30 13:09:35 receive version message: /bitcoinseeder:0.01/:
> version 60000, blocks=230000, us=162.219.2.72:8333, peer=11843
> 2014-07-30 13:12:42 receive version message: /bitcoinseeder:0.01/:
> version 60000, blocks=230000, us=162.219.2.72:8333, peer=11846
>
> The version message helpfully tells me my own IP address but not theirs ;p
>
> --
> Jeff Garzik
> Bitcoin core developer and open source evangelist
> BitPay, Inc.      https://bitpay.com/
>
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