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Date: Wed, 3 Aug 2011 07:00:24 -0700
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From: Rick Wesson <rick@support-intelligence.com>
To: Mike Hearn <mike@plan99.net>
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Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] DNS seeds returning gone peers
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Mike,
I think I can contribute to your DNS seeding project. Could you help define
long-lived peers?
-rick
On Wed, Aug 3, 2011 at 3:04 AM, Mike Hearn <mike@plan99.net> wrote:
> This is expected to happen from time to time of course as it's inherently
> racy, but there are a *lot* of bad nodes appearing in the DNS seeds.
>
> $ nmap -oG /tmp/x -p 8333 `dig +short bitseed.bitcoin.org.uk
> dnsseed.bluematt.me bitseed.xf2.org`
> ...
> Nmap done: 48 IP addresses (25 hosts up) scanned in 9.80 seconds
>
> $ grep -c 'closed' /tmp/x
> 6
>
> So of 48 IPs returned only 19 are actually usable. This is slowing down
> peer bringup for the Android apps, which don't currently save the addresses
> of last-used peers (yes, I know we should fix this).
>
> I was talking to a friend a few days ago about Bitcoin, he seemed
> interested. I'm hoping he might take on DNS seeding as a project. A custom
> DNS server that watches the network to find long-lived peers that run the
> latest version would be helpful for resolving this kind of thing.
>
>
> ------------------------------------------------------------------------------
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--000e0cd48ebe292f5704a99a4916
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Mike,<div><br></div><div>I think I can=A0contribute=A0to your DNS seeding p=
roject. Could you help define long-lived peers?=A0</div><div><br></div><div=
>-rick</div><div><br><br><div class=3D"gmail_quote">On Wed, Aug 3, 2011 at =
3:04 AM, Mike Hearn <span dir=3D"ltr"><<a href=3D"mailto:mike@plan99.net=
">mike@plan99.net</a>></span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex;">This is expected to happen from time to tim=
e of course as it's inherently racy, but there are a <i>lot</i>=A0of ba=
d nodes appearing in the DNS seeds.<div>
<br></div><div><div><div><font face=3D"'courier new', monospace">$ =
nmap -oG /tmp/x -p 8333 `dig +short <a href=3D"http://bitseed.bitcoin.org.u=
k" target=3D"_blank">bitseed.bitcoin.org.uk</a> <a href=3D"http://dnsseed.b=
luematt.me" target=3D"_blank">dnsseed.bluematt.me</a> <a href=3D"http://bit=
seed.xf2.org" target=3D"_blank">bitseed.xf2.org</a>`</font></div>
</div></div><div><font face=3D"'courier new', monospace">...</font>=
</div><div><div><font face=3D"'courier new', monospace">Nmap done: =
48 IP addresses (25 hosts up) scanned in 9.80 seconds</font></div>
</div><div><font face=3D"'courier new', monospace"><br></font></div=
><div><font face=3D"'courier new', monospace">$ grep -c 'closed=
' /tmp/x</font></div>
<div><font face=3D"'courier new', monospace">6<br></font><br></div>=
<div>So of 48 IPs returned only 19 are actually usable. This is slowing dow=
n peer bringup for the Android apps, which don't currently save the add=
resses of last-used peers (yes, I know we should fix this).</div>
<div><br></div><div>I was talking to a friend a few days ago about Bitcoin,=
he seemed interested. I'm hoping he might take on DNS seeding as a pro=
ject. A custom DNS server that watches the network to find long-lived peers=
that run the latest version would be helpful for resolving this kind of th=
ing.</div>
<br>-----------------------------------------------------------------------=
-------<br>
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Get tools for creating Super Apps. See the latest technologies.<br>
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br>
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<br></blockquote></div><br></div>
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