focal (8) gdnsd-plugin-reflect.8.gz

NAME

       gdnsd-plugin-reflect - gdnsd cache reflector plugin

SYNOPSIS

       Zonefile RRs using reflect resolution

         reflect      10 DYNA reflect
         reflect-dns  10 DYNA reflect!dns
         reflect-edns 10 DYNA reflect!edns
         reflect-both 10 DYNA reflect!both
         reflect-best 10 DYNA reflect!best

DESCRIPTION

       gdnsd-plugin-reflect is a resolution plugin that acts as a live debugging tool.  It reflects a view of
       the client's network address back in the response in the form of "A" or "AAAA" RRs.  It can be used with
       both "DYNA" and "DYNC" RRs, and will return address data in both cases.

       The plugin can operate in one of four modes named "dns", "edns", "both", and "best", which can be
       selected by using the mode name as a resource name in the zonefile, as shown in the example above.  The
       default mode is "best".  The modes operate as follows:

       dns In the "dns" mode, the address in the response is always the source IP address of the request as seen
           by gdnsd.  Note that this is generally the public address of a central cache/resolver server rather
           than the end-user client itself.

       edns
           In the "edns" mode, the address in the response is the address sent by the client in the
           "edns-client-subnet" option.  If the client did not send such an option, the IPv4 address 0.0.0.0 is
           returned.

       both
           In the "both" mode, both of the above results are returned in the same response, but there is no
           artificial 0.0.0.0 added if no "edns-client-subnet" option was available.

       best
           In the "best" (default) mode, if the "edns-client-subnet" option was specified its data is returned
           as in the "edns" case, otherwise the source IP address is returned as in the "dns" case.

SEE ALSO

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

       The gdnsd manual.

COPYRIGHT AND LICENSE

       Copyright (c) 2014 Brandon L Black <blblack@gmail.com>

       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
       <http://www.gnu.org/licenses/>.