Changes between Version 13 and Version 14 of AvahiAndUnicastDotLocal

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Timestamp:
07/23/08 19:33:56 (5 years ago)
Author:
UncleOp
Comment:

clean up last change

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  • AvahiAndUnicastDotLocal

    v13 v14  
    22= Avahi and Unicast Domains `.local` = 
    33 
    4 mDNS/DNS-SD is inherently incompatible with unicast DNS zones `.local`. We strongly recommend not to use Avahi or [http://0pointer.de/lennart/projects/nss-mdns/ nss-mdns] in such a network setup. 
     4mDNS/DNS-SD is inherently incompatible with unicast DNS zones `.local`. We strongly recommend not to use Avahi or [http://0pointer.de/lennart/projects/nss-mdns/ nss-mdns] in such a network setup.   N.B.: nss-mdns is not typically bundled with Avahi and requires a separate download and install. 
    55 
    66'''Background''': The Zeroconf protocols Avahi implements are known as mDNS and DNS-SD. mDNS (short for Multicast DNS) is based on traditional (unicast) DNS, but the two systems do not interact. mDNS is used to manage a special cooperative zone  `.local` where all local mDNS servers can freely register host names or services. Before mDNS was introduced the domain `.local` was sometimes used in non-public (unicast) DNS servers to assign names in LANs. Unfortunately some networks still use this domain that way. If Avahi and nss-mdns is installed properly a machine does not contact a unicast DNS server when resolving names from the `.local` domain, thus the unicast DNS domain `.local` becomes unreachable. 
     
    1212If you really want to use Avahi with `.local` as unicast domain, you might want to try the following. YMMV. Don't come running to us if something doesn't work as expected. It's your own fault! 
    1313 
    14 The recommended [[http://0pointer.de/lennart/projects/nss-mdns/ nss-mdns]] configuration line for `/etc/nsswitch.conf` is  
     14The recommended nss-mdns configuration line for `/etc/nsswitch.conf` is  
    1515 
    1616{{{ 
     
    1818}}} 
    1919 
    20 This makes nss-mdns authoritative for `.local`. N.B.: nss-mdns is not typically bundled with Avahi and requires a [[http://0pointer.de/lennart/projects/nss-mdns/ separate download]] and install. 
     20This makes nss-mdns authoritative for `.local`. 
    2121 
    2222If this is changed as follows, unicast DNS will be tried before mDNS for `.local`, essentially "merging" the unicast and the multicast domain `.local`, with unicast taking precedence.