From: Mike Hearn <mike@plan99•net>
To: Bitcoin Dev <bitcoin-development@lists•sourceforge.net>
Subject: [Bitcoin-development] DNS seeds returning gone peers
Date: Wed, 3 Aug 2011 12:04:11 +0200 [thread overview]
Message-ID: <CANEZrP1-BaNmKhSPXSe2sjH0-DPm62_=OQ_S6aCT3-nLdFLLGA@mail.gmail.com> (raw)
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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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next reply other threads:[~2011-08-03 10:04 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-03 10:04 Mike Hearn [this message]
2011-08-03 11:38 ` Matt Corallo
2011-08-03 12:00 ` Mike Hearn
2011-08-03 12:15 ` Johannes Henninger
2011-08-03 12:17 ` Mike Hearn
2011-08-03 12:27 ` Caleb James DeLisle
2011-08-03 12:40 ` Mike Hearn
2011-08-03 14:00 ` Rick Wesson
2011-08-03 14:10 ` Mike Hearn
2011-08-03 14:18 ` Rick Wesson
2011-08-03 14:28 ` Douglas Huff
2011-08-03 14:39 ` Mike Hearn
2011-08-03 14:48 ` Gregory Maxwell
2011-08-03 15:32 ` Matt Corallo
2011-08-03 14:37 ` Christian Decker
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