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| author | Matt Corallo <bitcoin-list@bluematt.me> | 2011-08-03 13:38:19 +0200 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2011-08-03 11:38:34 +0000 |
| commit | eeaca3b68b93ba6906ab6b925945aae3363a2afc (patch) | |
| tree | 8c56004be591784392052d151562fa9794b2a0bf | |
| parent | 17bfb1d61ed6f9abcdd07c10fd5301112739495a (diff) | |
| download | pi-bitcoindev-eeaca3b68b93ba6906ab6b925945aae3363a2afc.tar.gz pi-bitcoindev-eeaca3b68b93ba6906ab6b925945aae3363a2afc.zip | |
Re: [Bitcoin-development] DNS seeds returning gone peers
| -rw-r--r-- | af/4570c91a07bf0e8bf1b01e4e2065f14628fff8 | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/af/4570c91a07bf0e8bf1b01e4e2065f14628fff8 b/af/4570c91a07bf0e8bf1b01e4e2065f14628fff8 new file mode 100644 index 000000000..0a8a07ddf --- /dev/null +++ b/af/4570c91a07bf0e8bf1b01e4e2065f14628fff8 @@ -0,0 +1,144 @@ +Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] + helo=mx.sourceforge.net) + by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) + (envelope-from <bitcoin-list@bluematt.me>) id 1QoZmU-0005g0-TS + for bitcoin-development@lists.sourceforge.net; + Wed, 03 Aug 2011 11:38:34 +0000 +Received-SPF: pass (sog-mx-2.v43.ch3.sourceforge.com: domain of bluematt.me + designates 208.79.240.5 as permitted sender) + client-ip=208.79.240.5; envelope-from=bitcoin-list@bluematt.me; + helo=smtpauth.rollernet.us; +Received: from smtpauth.rollernet.us ([208.79.240.5]) + by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) + (Exim 4.76) id 1QoZmS-0003Bv-F6 + for bitcoin-development@lists.sourceforge.net; + Wed, 03 Aug 2011 11:38:34 +0000 +Received: from smtpauth.rollernet.us (localhost [127.0.0.1]) + by smtpauth.rollernet.us (Postfix) with ESMTP id 09A62594033 + for <bitcoin-development@lists.sourceforge.net>; + Wed, 3 Aug 2011 04:38:12 -0700 (PDT) +Received: from mail.bluematt.me (unknown + [IPv6:2001:470:9ff2:2:20c:29ff:fe16:f239]) + (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) + (No client certificate requested) + (Authenticated sender: @bluematt.me) + by smtpauth.rollernet.us (Postfix) with ESMTPSA + for <bitcoin-development@lists.sourceforge.net>; + Wed, 3 Aug 2011 04:38:11 -0700 (PDT) +Received: from [IPv6:2001:470:9ff2:1:2c0:caff:fe33:858b] (unknown + [IPv6:2001:470:9ff2:1:2c0:caff:fe33:858b]) + by mail.bluematt.me (Postfix) with ESMTPSA id 95EBF261A + for <bitcoin-development@lists.sourceforge.net>; + Wed, 3 Aug 2011 13:38:19 +0200 (CEST) +From: Matt Corallo <bitcoin-list@bluematt.me> +To: bitcoin-development@lists.sourceforge.net +In-Reply-To: <CANEZrP1-BaNmKhSPXSe2sjH0-DPm62_=OQ_S6aCT3-nLdFLLGA@mail.gmail.com> +References: <CANEZrP1-BaNmKhSPXSe2sjH0-DPm62_=OQ_S6aCT3-nLdFLLGA@mail.gmail.com> +Content-Type: multipart/signed; micalg="pgp-sha1"; + protocol="application/pgp-signature"; + boundary="=-/8k+369dKwStOZeaoEy6" +Date: Wed, 03 Aug 2011 13:38:19 +0200 +Message-ID: <1312371499.2322.14.camel@Desktop666> +Mime-Version: 1.0 +X-Mailer: Evolution 2.32.2 +X-Rollernet-Abuse: Processed by Roller Network Mail Services. Contact + abuse@rollernet.us to report violations. Abuse policy: + http://rollernet.us/abuse.php +X-Rollernet-Submit: Submit ID 3205.4e393323.4677b.0 +X-Spam-Score: 0.2 (/) +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] + -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for + sender-domain + -0.0 SPF_HELO_PASS SPF: HELO matches SPF record + -0.0 SPF_PASS SPF: sender matches SPF record +X-Headers-End: 1QoZmS-0003Bv-F6 +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: <bitcoin-development.lists.sourceforge.net> +List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=unsubscribe> +List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=bitcoin-development> +List-Post: <mailto:bitcoin-development@lists.sourceforge.net> +List-Help: <mailto:bitcoin-development-request@lists.sourceforge.net?subject=help> +List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=subscribe> +X-List-Received-Date: Wed, 03 Aug 2011 11:38:35 -0000 + + +--=-/8k+369dKwStOZeaoEy6 +Content-Type: text/plain; charset="UTF-8" +Content-Transfer-Encoding: quoted-printable + +On Wed, 2011-08-03 at 12:04 +0200, 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). +Its actually much, much less. You forgot to grep for filtered, which +are also worthless and you didn't make an actual connection to the node, +meaning there is no way to tell if the node has its connection slots +full (a node which has the maximum connection count will ack a syn, but +will drop the connection after the first message, so nmap thinks the +port is open). +I just tested and I show 0 accepting from bitseed.xf2.org and 0 from +bitcoin.bitcoin.co.uk. dnsseed.bluematt.me rotates every 2 minutes to +the most recently checked so it tends to be pretty good if you get it +right after a rotate, if you wait to long, those slots fill up quick. +>=20 +> 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. +Point him to https://github.com/TheBlueMatt/dnsseed it could use a bit +of cleanup, but it works. +If a different DNS Server were used to could pull directly from the +database in a more dynamic way it would probably work better too (it was +originally set up on MySQL and PowerDNS, but that is quite a resource +hog compared to SQLite and BIND, but the original backend is still there +and could work if you have a beefy enough server). + +Matt + +--=-/8k+369dKwStOZeaoEy6 +Content-Type: application/pgp-signature; name="signature.asc" +Content-Description: This is a digitally signed message part + +-----BEGIN PGP SIGNATURE----- +Version: GnuPG v1.4.11 (GNU/Linux) + +iQIcBAABAgAGBQJOOTMgAAoJEBrh01BD4I5U9pUQAJlu7uDBrTZz7uPma5sReCe4 +8jfLCbbOcmL5aU21N0VK2fye5yqSzGD5R9hn2pFPz0tT6osHHACbrHVbPaKCOsgp +pWmxApOJlAbMJhPFITqzKcExmfhvVUKMo3q3T25MBSHEqXUQCQExLFFBZOEyXNrj +HZ+ALk6FkSenBYaZ8Q4EIytiUv5kt0n+eWTnhgWeN75E9Ye9+NfWQFPSlL3BD68s +U1d/cxTIzMuI6+LETKtpz3PIbLg4RQqTLMWWEUW9GuScSVM0Qfu/Hwt9pypbM2Ia +AV06dIfnEDahYbnqzs+0EJNjjaBdKI6LczASUgMbptuv1hsn+l9ZSmGObnNdvpj1 +K9NvSQnVFREcddcSuMsNQOlQuevGQ+/ZK/p8suUqDcn/Z+eMKPzPTTeA/aWMMPwr +hGdSI0pyMyMOUKeU5VhbTJsVCXoc4y5XM/PRm8tb3DFzNqRJ4H6hI09hSrJyUOHL +tih73jGeiGKaNaNkLoi0vL/MJln5dtkOvDtG+md1KVGtMv8Dd7n5QePCe9yDK/Bv +qVrBEWkUyD8ZFGM8l/IEIWcdcBsH5J37p3bkJrx14GcszQ3PyGSuwdE2m0JeqSsk +XmTzojIai05GfdeChQlP4YMobE3IjgSibuKVdN5jXoDNC5BW6tCV1vD1nkAt7BvC +jBpEvXQhQx/A/mbqGpVp +=dULe +-----END PGP SIGNATURE----- + +--=-/8k+369dKwStOZeaoEy6-- + + + |