Provided by: gdnsd_2.2.0-1ubuntu1_i386 bug


       gdnsd-plugin-null - gdnsd null plugin


       Example null service_types config:

         service_types => {
           my_null_mon => {
             plugin => null,
             # ... other generic service_type params

       Zonefile RRs using null resolution

         foo 300 DYNA null
         bar 300 DYNC null!whatever


       gdnsd-plugin-null exists mostly as an example of the minimum possible
       plugin of both types.  It is simultaneously both a monitoring plugin
       and a resolution plugin.

       When used as a resolution plugin in "DNYA" or "DYNC" RRs, it ignores
       any resource name provided.  With "DYNA" it always returns the IPv4
       address and the IPv6 address "::".  With "DYNC" it always
       returns a CNAME to to the domainname "invalid."

       When used as a monitoring plugin by defining a service_type as shown in
       the example above it emulates the behavior of a real monitoring plugin
       (updating at correct intervals, etc) but sends a "DOWN" result at every
       monitoring check interval without actually checking anything.


       gdnsd.config(5), gdnsd.zonefile(5), gdnsd(8)

       The gdnsd manual.


       Copyright (c) 2014 Brandon L Black <>

       This file is part of gdnsd.

       gdnsd is free software: you can redistribute it and/or modify it under
       the terms of the GNU General Public License as published by the Free
       Software Foundation, either version 3 of the License, or (at your
       option) any later version.

       gdnsd is distributed in the hope that it will be useful, but WITHOUT
       ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
       FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
       for more details.

       You should have received a copy of the GNU General Public License along
       with gdnsd.  If not, see <>.