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From: Matt Corallo <lf-lists@mattcorallo.com>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: [bitcoin-dev] Bitcoin Core to disable Bloom-based Filtering by default
Date: Sat, 20 Jul 2019 17:46:52 +0000	[thread overview]
Message-ID: <59fad2b6-9b15-ffec-116e-91d27ce29f80@mattcorallo.com> (raw)

Just a quick heads-up for those watching the list who may be using it -
in the next Bitcoin Core release bloom filter serving will be turned off
by default. This has been a long time coming, it's been an option for
many releases and has been a well-known DoS vector for some time.
As other DoS vectors have slowly been closed, this has become
increasingly an obvious low-hanging fruit. Those who are using it should
already have long been filtering for NODE_BLOOM-signaling nodes, and I
don't anticipate those being gone any time particularly soon.

See-also PR at https://github.com/bitcoin/bitcoin/pull/16152

The release notes will liekly read:

P2P Changes
-----------
- The default value for the -peerbloomfilters configuration option (and,
thus, NODE_BLOOM support) has been changed to false.
  This resolves well-known DoS vectors in Bitcoin Core, especially for
nodes with spinning disks. It is not anticipated that
  this will result in a significant lack of availability of
NODE_BLOOM-enabled nodes in the coming years, however, clients
  which rely on the availability of NODE_BLOOM-supporting nodes on the
P2P network should consider the process of migrating
  to a more modern (and less trustful and privacy-violating) alternative
over the coming years.

Matt


             reply	other threads:[~2019-07-20 17:46 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-20 17:46 Matt Corallo [this message]
2019-07-21 22:56 ` [bitcoin-dev] Bitcoin Core to disable Bloom-based Filtering by default Andreas Schildbach
2019-07-22  5:01   ` Matt Corallo
2019-07-22 15:58     ` Justus Ranvier
2019-07-26  7:45       ` Tamas Blummer
2019-07-22  8:32   ` Peter Todd
2019-07-22 13:25   ` Jonas Schnelli
2019-07-22 17:17     ` Luke Dashjr
2019-07-22 17:26   ` Luke Dashjr
2019-07-23 14:47   ` Andreas Schildbach
2019-07-24 13:11     ` Justus Ranvier
2019-07-25  3:04     ` Luke Dashjr
2019-07-26 10:04     ` Jonas Schnelli
2019-07-27 16:10       ` Matt Corallo
2019-07-26 16:48     ` Chris
2019-07-27 19:19     ` Luke Dashjr
2019-07-22 15:04 ` Tom Harding
2019-07-22 15:15   ` Dustin Dettmer
     [not found] ` <FF0175BF-1D1F-4AD4-9B13-99D522DBCD83@bridge21.com>
2019-08-14 15:07   ` Matt Corallo
2019-07-22 18:52 Peter
2019-07-22 20:42 ` Greg Sanders
2019-07-22 21:17 ` Luke Dashjr
2019-07-23 20:36 ` Peter Todd

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