On Monday, 25 May 2015, at 11:48 pm, Jim Phillips wrote: > Do any wallets actually do this yet?
Not that I know of, but they do seed their address database via DNS, which you can poison if you control the LAN's DNS resolver. I did this for a Bitcoin-only Wi-Fi network I operated at a remote festival. We had well over a hundred lightweight wallets, all trying to connect to the Bitcoin P2P network over a very bandwidth-constrained Internet link, so I poisoned the DNS and rejected all outbound connection attempts on port 8333, to force all the wallets to connect to a single local full node, which had connectivity to a single remote node over the Internet. Thus, all the lightweight wallets at the festival had Bitcoin network connectivity, but we only needed to backhaul the Bitcoin network's transaction traffic once. > On May 25, 2015 11:37 PM, "Matt Whitlock" <b...@mattwhitlock.name> wrote: > > > This is very simple to do. Just ping the "all nodes" address (ff02::1) and > > try connecting to TCP port 8333 of each node that responds. Shouldn't take > > but more than a few milliseconds on any but the most densely populated LANs. > > > > > > On Monday, 25 May 2015, at 11:06 pm, Jim Phillips wrote: > > > Is there any work being done on using some kind of zero-conf service > > > discovery protocol so that lightweight clients can find a full node on > > the > > > same LAN to peer with rather than having to tie up WAN bandwidth? > > > > > > I envision a future where lightweight devices within a home use SPV over > > > WiFi to connect with a home server which in turn relays the transactions > > > they create out to the larger and faster relays on the Internet. > > > > > > In a situation where there are hundreds or thousands of small SPV devices > > > in a single home (if 21, Inc. is successful) monitoring the blockchain, > > > this could result in lower traffic across the slow WAN connection. And > > > yes, I realize it could potentially take a LOT of these devices before > > the > > > total bandwidth is greater than downloading a full copy of the > > blockchain, > > > but there's other reasons to host your own full node -- trust being one. > > > > > > -- > > > *James G. Phillips IV* > > > <https://plus.google.com/u/0/113107039501292625391/posts> > > > <http://www.linkedin.com/in/ergophobe> > > > > > > *"Don't bunt. Aim out of the ball park. Aim for the company of > > immortals." > > > -- David Ogilvy* > > > > > > *This message was created with 100% recycled electrons. Please think > > twice > > > before printing.* > > ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
