[p2p-hackers] Kad Network with Kademlia

[Michael Liu]

----- Original Message ----- 
From: "Eunsoo Shim" <eunsoo at research.panasonic.com>
To: "Peer-to-peer development." <p2p-hackers at zgp.org>
Sent: Sunday, December 18, 2005 7:43 AM
Subject: Re: [p2p-hackers] Kad Network with Kademlia


> 
> >>>>I measured it to be around a million non-firewalled peers, although
> >>>>that was a few months back.
> >>>>        
> >>>>
> >>Daniel, by "non-firewalled" do you mean truly, those that aren't behind 
> >>a firewall, or rather those for which NAT/firewall traversal doesn't 
> >>work?
> >>    
> >>
> >
> >I mean those that can receive unsolicited TCP and UDP packets on the
> >Kad/eMule ports.  Either they must not be firewalled/NATed or the user
> >must manually punch a whole to redirect those ports from the firewall
> >device.
> >  
> >
> So port 80 or 443 is NOT used at all for Kad Network?
> 
> >Kad uses "iterative" DHT routing.  If I'm a client and want to do a
> >lookup, I query some of my contacts to get their next hop for my
> >target, then I query that peer for it's next hop, etc.  Therefore,
> >it's important that any host participating in Kad's DHT routing
> >structure be able to receive unsolicited packets.
> >
> >  
> >
> "Iterative" DHT routing is inefficient compared to "recursive" one.
> Is "iterative" routing used because of a concern about DoS attacks?
> Thanks.

I wonder why 'Iterative' DHT routing is less efficient than 'recursive' one? it seems the efficiency are same ...

I am also astonished to find DHT can support millions of active nodes, it's fantastic .

> 
> Eunsoo
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