Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1QocQ3-0000fw-TE for bitcoin-development@lists.sourceforge.net; Wed, 03 Aug 2011 14:27:35 +0000 X-ACL-Warn: Received: from mail-yx0-f175.google.com ([209.85.213.175]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-MD5:128) (Exim 4.76) id 1QocQ3-0002jA-40 for bitcoin-development@lists.sourceforge.net; Wed, 03 Aug 2011 14:27:35 +0000 Received: by yxi19 with SMTP id 19so622361yxi.34 for ; Wed, 03 Aug 2011 07:27:29 -0700 (PDT) MIME-Version: 1.0 Received: by 10.150.74.10 with SMTP id w10mr694542yba.224.1312380024335; Wed, 03 Aug 2011 07:00:24 -0700 (PDT) Received: by 10.150.138.1 with HTTP; Wed, 3 Aug 2011 07:00:24 -0700 (PDT) In-Reply-To: References: Date: Wed, 3 Aug 2011 07:00:24 -0700 Message-ID: From: Rick Wesson To: Mike Hearn Content-Type: multipart/alternative; boundary=000e0cd48ebe292f5704a99a4916 X-Spam-Score: 2.9 (++) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. 1.0 HTML_MESSAGE BODY: HTML included in message 0.3 HTML_FONT_FACE_BAD BODY: HTML font face is not a word 1.7 URIBL_WS_SURBL Contains an URL listed in the WS SURBL blocklist [URIs: bitcoin.org.uk] X-Headers-End: 1QocQ3-0002jA-40 Cc: Bitcoin Dev Subject: Re: [Bitcoin-development] DNS seeds returning gone peers X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Aug 2011 14:27:36 -0000 --000e0cd48ebe292f5704a99a4916 Content-Type: text/plain; charset=ISO-8859-1 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 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. > > > ------------------------------------------------------------------------------ > BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA > The must-attend event for mobile developers. Connect with experts. > Get tools for creating Super Apps. See the latest technologies. > Sessions, hands-on labs, demos & much more. Register early & save! > http://p.sf.net/sfu/rim-blackberry-1 > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > > --000e0cd48ebe292f5704a99a4916 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Mike,

I think I can=A0contribute=A0to your DNS seeding p= roject. Could you help define long-lived peers?=A0

-rick


On Wed, Aug 3, 2011 at = 3:04 AM, Mike Hearn <mike@plan99.net> wrote:
This is expected to happen from time to tim= e of course as it's inherently racy, but there are a lot=A0of ba= d 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 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).

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.

-----------------------------------------------------------------------= -------
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The must-attend event for mobile developers. Connect with experts.
Get tools for creating Super Apps. See the latest technologies.
Sessions, hands-on labs, demos & much more. Register early & save!<= br> http://p= .sf.net/sfu/rim-blackberry-1
_______________________________________= ________
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Bitcoin-develo= pment@lists.sourceforge.net
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