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Re: Multicast DNS & the ".local" domain



On Nov 12, 2004, at 16:54, Kyrre Ness Sjobak wrote:

fre, 12.11.2004 kl. 00.44 skrev Felipe Alfaro Solana:
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.

So in short - those who connect a mac to a network containing a FC3 print-server but no DNS, does now not have to fiddle with hosts? It should JustWork(tm)?

Yes, but the mDNSResponder daemon must be running, and it's recommended that you use a ".local" domain.


You don't need to publish any IPP (the Internet Printing Protocol) into /etc/howl/mDNSResponder.conf, since both Fedora and Mac OS X use CUPS. CUPS does allow for on-the-fly printer publishing, that is, whenever Fedora bring CUPS up, it will advertise the printers it has configured, and the Mac OS X will use that information to build a list of available printers.

If you don't want CUPS to broadcast information, you can statically publish an IPP record into Howl so the printer is also available automatically via Rendezvous.


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