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Old 06-15-2016, 07:38 AM   #1
sundialsvcs
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Question I need a quick but gentle introduction to "Avahi" and Multicast DNS


In another very-recent thread on this forum, I talked about the problem in which "ping" (and the web browser) stopped finding domain-names while "dig" did not. I have since discovered that this seems to be related to Apple's mDNSResponder daemon, and to Multicast DNS in general.

Right now, I have a server on a VPN which is intended to provide a DNS server, while one is connected, that provides the location of a few hundred internal-only web sites. These sites, like the DNS server itself, are available only while the OpenVPN tunnel is up.

I used "dnsmasq" as the DNS server, since it can read a hosts-file and provide names from it.

But I am coming to the conclusion that this is not enough: that the VPN server also needs to be running a Multicast DNS service. This lead me to stumble-upon the name, "Avahi."



What I really need right now is for "someone who knows" to tell me exactly what I need to do here. Do I need Avahi (or something else), and if so, how do I set it up to do what I need to do here?

And, if I am "barking up the wrong tree," I need to know that, too!

Last edited by sundialsvcs; 06-15-2016 at 07:39 AM.
 
Old 06-15-2016, 07:27 PM   #2
sundialsvcs
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I'm gonna close this thread because, "now, I'm not so sure." It looks like Mac OS/X is the odd-man-out when it comes to the way that it resolves DNS entries., (They say that, instead of firing requests to all known DNS's, it round-robins between them. Haven't verified that yet.

And, in any case, there's the "tunnel vs. tap" issue when it comes to things like Bonjour.

Since I'm no longer persuaded that this is a rabbit-hole that I actually need to jump into ... it's beginning to look and smell strongly of herring ... I'll park this.
 
  


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