Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1QocHJ-0000Ih-55 for bitcoin-development@lists.sourceforge.net; Wed, 03 Aug 2011 14:18:33 +0000 X-ACL-Warn: Received: from mail-gx0-f175.google.com ([209.85.161.175]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-MD5:128) (Exim 4.76) id 1QocHI-0006gJ-2v for bitcoin-development@lists.sourceforge.net; Wed, 03 Aug 2011 14:18:33 +0000 Received: by gxk3 with SMTP id 3so280164gxk.34 for ; Wed, 03 Aug 2011 07:18:26 -0700 (PDT) MIME-Version: 1.0 Received: by 10.150.65.21 with SMTP id n21mr688403yba.167.1312381106531; Wed, 03 Aug 2011 07:18:26 -0700 (PDT) Received: by 10.150.138.1 with HTTP; Wed, 3 Aug 2011 07:18:26 -0700 (PDT) In-Reply-To: References: Date: Wed, 3 Aug 2011 07:18:26 -0700 Message-ID: From: Rick Wesson To: Mike Hearn Content-Type: multipart/alternative; boundary=000e0cd48ba2aa2d1804a99a891d X-Spam-Score: 2.9 (++) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. 1.7 URIBL_WS_SURBL Contains an URL listed in the WS SURBL blocklist [URIs: bitcoin.org.uk] 1.0 HTML_MESSAGE BODY: HTML included in message 0.3 HTML_FONT_FACE_BAD BODY: HTML font face is not a word X-Headers-End: 1QocHI-0006gJ-2v 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 14:18:33 -0000 --000e0cd48ba2aa2d1804a99a891d Content-Type: text/plain; charset=ISO-8859-1 Starting from bitcoinj, I have plenty of ways to publish DNS. Why sort them by version? Ordering from highest to lowest? how about publishing addresses under version.example.com if you version has a perfrence? -rick On Wed, Aug 3, 2011 at 7:10 AM, Mike Hearn wrote: > There's no project currently :-) > > Starting from Matts code is probably the way to go. It's written in PHP. > Alternatively, you could write a Java app for it, as there are drop-in DNS > serving libraries you could link with BitCoinJ+sqlite. It probably wouldn't > be that hard. You'd want to sort nodes by version, how long they've been > observed to exist, the last polling time, etc. > > On Wed, Aug 3, 2011 at 4:00 PM, Rick Wesson > wrote: > >> 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 >>> >>> >> > --000e0cd48ba2aa2d1804a99a891d Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Starting from bitcoinj, I have plenty of ways to publish DNS. Why sort them= by version? Ordering from highest to lowest?=A0

how abo= ut publishing addresses under versio= n.example.com if you version has a perfrence?

-rick


On W= ed, Aug 3, 2011 at 7:10 AM, Mike Hearn <mike@plan99.net> wrote:
There's no project currently :-)=A0

Starting from Ma= tts code is probably the way to go. It's written in PHP. Alternatively,= you could write a Java app for it, as there are drop-in DNS serving librar= ies you could link with BitCoinJ+sqlite. It probably wouldn't be that h= ard. You'd want to sort nodes by version, how long they've been obs= erved to exist, the last polling time, etc.

On Wed, Aug 3, 2011 at 4:00 PM, Rick We= sson <rick@support-intelligence.com> wrote:
<= blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px= #ccc solid;padding-left:1ex"> 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> w= rote:
This is exp= ected to happen from time to time of course as it's inherently racy, bu= t there are a lot=A0of 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 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.

------------------------------------------------------= ------------------------
BlackBerry&reg; 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!<= br> http://p= .sf.net/sfu/rim-blackberry-1
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