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Subject: Re: [Bitcoin-development] DNS seeds unstable
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Hmmm, not for me:
$ nslookup bitcoin-seed.alexykot.me
Server: 127.0.1.1
Address: 127.0.1.1#53
** server can't find bitcoin-seed.alexykot.me: SERVFAIL
$ nslookup testnet-seed.alexykot.me
Server: 127.0.1.1
Address: 127.0.1.1#53
** server can't find testnet-seed.alexykot.me: SERVFAIL
Can you look up in the logfile what requests I just made?
On 05/21/2014 01:10 PM, Alex Kotenko wrote:
> Misunderstanding. Both seeds are available on port 53 via BIND forwarding.
> Just also each DNS seed is available separately on it's own port.
>
>
> Best regards,
> Alex Kotenko
>
>
> 2014-05-21 12:03 GMT+01:00 Andreas Schildbach <andreas@schildbach.de
> <mailto:andreas@schildbach.de>>:
>
> Great, thanks for this contribution!
>
> Do you plan to have your seeds reachable on port 53 eventually?
> Currently bitcoinj cannot deal with nonstandard ports I think.
>
>
> On 05/21/2014 11:23 AM, Alex Kotenko wrote:
> > okay, I've set it up with bind forwarding requests to two dnsseeds
> > running on separate ports. Though I see a problem with testnet DNS
> seed
> > itself. It runs, but somehow it only returns one IP address. Exactly
> > same DNS seeder looking for mainnet nodes is working fine.
> >
> > You can reach seeds through
> > mainnet seed:
> > dig @node.alexykot.me <http://node.alexykot.me>
> <http://node.alexykot.me> bitcoin-seed.alexykot.me
> <http://bitcoin-seed.alexykot.me>
> > <http://bitcoin-seed.alexykot.me> A
> > or directly
> > dig -p 8353 @node.alexykot.me <http://node.alexykot.me>
> <http://node.alexykot.me>
> > bitcoin-seed.alexykot.me <http://bitcoin-seed.alexykot.me>
> <http://bitcoin-seed.alexykot.me> A
> >
> > testnet seed
> > dig @node.alexykot.me <http://node.alexykot.me>
> <http://node.alexykot.me> testnet-seed.alexykot.me
> <http://testnet-seed.alexykot.me>
> > <http://testnet-seed.alexykot.me> A
> > or directly
> > dig -p 18353 @node.alexykot.me <http://node.alexykot.me>
> <http://node.alexykot.me>
> > testnet-seed.alexykot.me <http://testnet-seed.alexykot.me>
> <http://testnet-seed.alexykot.me> A
> >
> > So what can be the problem with testnet DNS seeder?
> >
> >
> > Best regards,
> > Alex Kotenko
> >
> >
> > 2014-05-20 1:50 GMT+01:00 Robert McKay <robert@mckay.com
> <mailto:robert@mckay.com>
> > <mailto:robert@mckay.com <mailto:robert@mckay.com>>>:
> >
> > On Tue, 20 May 2014 01:44:29 +0100, Robert McKay wrote:
> > > On Mon, 19 May 2014 19:49:52 -0400, Jeff Garzik wrote:
> > >> On Mon, May 19, 2014 at 4:36 PM, Robert McKay
> <robert@mckay.com <mailto:robert@mckay.com>
> > <mailto:robert@mckay.com <mailto:robert@mckay.com>>>
> > >> wrote:
> > >>> It should be possible to configure bind as a DNS
> forwarder.. this
> > >>> can
> > >>> be done in a zone context.. then you can forward the different
> > >>> zones
> > >>> to
> > >>> different dnsseed daemons running on different non-public
> IPs or
> > >>> two
> > >>> different ports on the same IP (or on one single non-public IP
> > >>> since
> > >>> there's really no reason to expose the dnsseed directly
> daemon at
> > >>> all).
> > >>
> > >> Quite the opposite. dnsseed data rotates through a lot of
> addresses
> > >> if available. Using the bind/zone-xfer system would result
> in fewer
> > >> total addresses going through to the clients, thanks to the
> addition
> > >> of caching levels that the bind/zone-xfer system brings.
> > >>
> > >> That said, if the choice is between no-service and bind,
> bind it is
> > >> ;p
> > >
> > > Setting it up as a zone forwarder causes each request to go
> through
> > > to
> > > the dnsseed backend for each request.
> >
> > This stackoverflow describes a similar situation;
> >
> >
> http://stackoverflow.com/questions/15338232/how-to-forward-a-subzone
> >
> > you can additionally specify the port to forward too;
> >
> > http://www.zytrax.com/books/dns/ch7/queries.html#forwarders
> >
> > it should be possible to forward to different ports on
> 127.0.0.1 for
> > each dnsseed instance.
> >
> > Rob
> >
> >
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