[Samba] Multicast DNS required?

John Yocum jtyocum at uw.edu
Tue Sep 23 17:24:28 MDT 2014

Ricoh's big MFPs support Bonjour, not sure about others.


On 09/23/2014 04:22 PM, Ryan Ashley wrote:
> Bear in mind, it isn't just Apple products. HP and other printer
> manufacturers are using ".local" for their wireless printers now also.
> Generally speaking, these won't be in a corporate environment due to
> nice big machines like a Xerox Fiery, but if they do make their way into
> the environment, they can cause trouble also. Good luck!
> On 09/23/2014 07:01 PM, James wrote:
>> Ryan,
>>     Thanks for the explanation and link. Will follow up and review.
>> Looks like I may have trouble up ahead seeing as the powers that be
>> want to introduce apple products into the domain.
>> On 9/23/2014 6:40 PM, Ryan Ashley wrote:
>>> mDNS is also called Bonjour on Apple systems (or Windows system with
>>> iTunes and such installed). This is used for something unrelated to
>>> actual DNS. In Linux we have "avahi" that does the same thing.
>>> However, a domain ending in ".local" can have issues due to zeroconf
>>> things (printers, wireless TV's, etc) use that domain. In other
>>> words, never, ever end a domain name in ".local". I use ".lan" for my
>>> domains. The issue is common on older domains that have been upgraded
>>> dozens of times. Even I had issues with it for a while. I do not
>>> believe Samba needs mDNS/zeroconf support though.
>>> You can read more on the matter at the link below. One of my clients
>>> (I picked them up a few years ago) had a domain ending in ".local"
>>> and they had begun using Apple devices (phones, iPads) and had all
>>> kinds of issues due to the ".local" domain being used by them. Long
>>> story short, I got lucky when their DC died and I got to do a new
>>> domain. Now everything is as smooth as butter!
>>> http://en.wikipedia.org/wiki/.local
>>> On 09/23/2014 03:34 PM, James wrote:
>>>> Hello,
>>>>     I noticed all my DC's have port 5353 closed. I'm using the
>>>> internal DNS and wasn't sure if multicast DNS must be enabled? I do
>>>> not appear to be having any DNS issues. My only concern is with the
>>>> wiki on Multicast DNS.
>>>> "By default, mDNS only and exclusively resolves host names ending
>>>> with the |.local| top-level domain (TLD). This can cause problems if
>>>> that domain includes hosts that do not implement mDNS but can be
>>>> found via a conventional unicast DNS server. Resolving such
>>>> conflicts requires network configuration changes that violate the
>>>> zero configuration
>>>> <http://en.wikipedia.org/wiki/Zero_configuration_networking> goal."
>>>> Given my domain is 'domain.local'. I wasn't sure if I should find
>>>> out why the port is closed.  Thanks.

John Yocum, Systems Administrator, DEOHS

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