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Re: Multicast DNS & the ".local" domain



On Nov 11, 2004, at 20:09, Kyrre Ness Sjobak wrote:

tor, 11.11.2004 kl. 18.54 skrev Felipe Alfaro Solana:
Short question: Does Fedora Core 3 support multicast DNS name
resolution for the ".local" domain?

Long: I can resolv my Linux hostname from my Mac OS X computer, but my
Linux box can't resolve my Mac OS X hostname.

Looking at the network traffic, Mac OS X name queries for the ".local"
domain do send mDNS traffic to the multicast mDNS address. Linux
queries for the ".local" domain go against my ISP DNS server.

So that is what "mDNS" stands for. What is it? Where can i find documentation? Simple, easy-to-understand explanations? Does it mean that i can name my computer "kyrre.local" and it will automatically be discovered and resolved on the LAN?

mDNS is a piece of Apple´s Rendezvous technology. There others are automatic link-local IPv4 address allocation and service discovery. Fedora Core 3 already has support for the multicast DNS responder part of Rendezvous, in form of the ¨howl¨package (see http://www.porchdogsoft.com/products/howl).


Also, take a look at http://developer.apple.com/macosx/rendezvous

The problem I'm having is that Linux mDNSResponder service works pretty well: when a Mac OS X computer asks mDNSResponder, it does. What I'm unable to achieve is just the opposite: make glibc's resolver use multicast DNS to resolve queries for the ".local" domain. It seems, however, that both SUSE and Gentoo have patches to make this work, and I wanted to know why Fedora does not.


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