[Pkg-bitcoin-devel] Bug#701915: Bug#701915: bitcoin-qt uses too much outgoing bandwidth

[Micha Bailey]

Please note that limiting connection bandwidth on a Bitcoin node (either
bitcoind or bitcoin-qt), *especially* while listening to connections (that
is, without setting listen=0 in the configuration file or -listen=0 on the
command line), is in fact, harmful to the Bitcoin network. If you accept
incoming connections, other nodes will connect to you. When you're relaying
data, whether this is transaction or block data, the data will reach your
peers slowly. The reason that this is more of a problem when listening to
connections is that if you listen for incoming connections, a peer that is
in the process of the initial sync with the network (either a new node, or
one that has been shut down for a while) may connect to you and request
blockchain data from your node. At the moment, the software selects one
node to sync from, and requests data only from that node. If a peer is
attempting to sync from your node and you have throttled the connection,
that peer will be damaged.
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