[Xastir] Free map access (was: Compression algorithm problem with DRGs)

[Brian D Heaton]

Curt/Jeff,

	You're absolutely right about universities (and additionally some ISP
networks) shutting down gnutella type traffic.  This is due because of
both copyright issues and the copious amounts of bandwidth they suck
down.

	What I like about Konspire (and the kast app), is that its actually
quite light on bandwidth, and it only makes your system a party to
relaying channels that you have subscribed too.  For example, if you
subscribe to any of the MAPS_* channels that I started last night,
you'll get the data flowing across them and participate in the
distribution of them.  Since you aren't subscribed to the
"gobs_of_illegally_shared_stuff" channel you don't participate in any
way in the exchange of that tainted data.  Kast also allows you to
specify both the maximum upload and download rates it will use. It
leverages P2P distribution while giving the owner of the system pretty
fine grained control of what they partake of and participate in.

	From a firewall perspective there is only one port that has to be
punched through.  Kast does everying via port 6085(TCP).  Depending on
your configuration and setting this may or may not be a big issue.

	I added the 1:100K DRGs for GA as a new channel last night late.  I'll
probably add in CA, NV, and one other tonight for DRGs.  Then I'll start
working on DTEDs, SRTMs, etc.

	Let me know what ya'll think.

			THX/BDH



On Mon, 2004-03-29 at 16:26, Curt, WE7U wrote:
> On Mon, 29 Mar 2004, Jeff Barlow wrote:
> 
> > I don't know much about these beyond the general concept. From what
> > little I do know, this does sound like a reasonable way to spread the
> > load, and avoid dependance on any one server.
> >
> > I wonder, though, if there aren't issues with firewalls and it being
> > generally harder to set up. Things that are too tricky to get working
> > will tend to discourage volunteers.
> 
> I know that some colleges/universities have shut down the use of
> these things because they are used more for illegal sharing of
> files/music than legal sharing.  That would knock out a few people,
> although I'm sure the college students always can figure out other
> way, like private accounts or friends with private accounts.
> 
> 
> > Am I the only one here who's rather clueless about these things? Perhaps
> > you could educate us.
> 
> I know about them, but haven't used them.
> 
> I think we might do ok just with a Wiki and a lot of download sites.
> Find a new site, add it.  Find a site that has been down too long,
> delete it.  If maps are freely available on a server, just point to
> it.  If there are some restrictions as to download speed/quantity,
> then we download the maps, put them on other sites, and point to the
> new sites.  We have to make sure that we're not sharing map data
> that's not free though.  That's the only downside I can think of.
> Perhaps someone could mirror the wiki pages involved also, so that
> we'd have two or three redirection sites available at all times.
> 
> --
> Curt, WE7U			    archer at eskimo dot com
> Arlington, WA, USA		http://www.eskimo.com/~archer
> "Lotto:    A tax on people who are bad at math." -- unknown
> "Windows:  Microsoft's tax on computer illiterates." -- WE7U
> "The world DOES revolve around me:  I picked the coordinate system!"
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Brian D Heaton
Senior Network Engineer
Janus Research Group
(706) 791-8342
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