Run PHP inside DNS zone Bind 10

Question

I'm using linux CentOS 6.64 with BIND 10.1.2

I have an additional zone (list.example.com) within the main DNS (example.com)

Bind (named) config file /etc/named.conf is include the zone:

zone "list.example.com" IN {
            type master;
    file "list-example-com.zone";
        allow-query { localhost; };
            allow-transfer { 127.0.0.1; };
    };

Zone file list-example-com.zone as follows:

$TTL 86400      ; 1 day
@               IN SOA  ns1.example.com. hostmaster.example.com. (
                        2004032201 ; serial
                        7200       ; refresh (2 hours)
                        5400       ; retry (1.5 hours)
                        1814400    ; expire (3 weeks)
                        86400      ; minimum (1 day)
                        )
                IN NS   ns1.example.com.
;
                IN A    192.168.177.22
;
; -----------------------------------------------------------------
49.30.22.66       IN A    127.0.0.3
44.63.20.10       IN A    127.0.0.2
64.42.10.5        IN A    127.0.0.2
14.3.6.8          IN A    127.0.0.3

// AND OTHER 1000S OF RECORDS LIKE THAT!

Let's pick one of recoded IPs as an example

The "A DNS lookup" for the IP 44.63.20.10 will be:

44.63.20.10.list.example.com and will return 127.0.0.2 from the DNS

Ok, now what i want to do is, instead of listing 1000s of IP records, i just want to run PHP file in named.conf, zone file or any other to execute some codes and return 127.0.0.2 for "A DNS" of IP 44.63.20.10

myfile.php:

<?php

// Just need to get the required IP (44.63.20.10) and the DNS_TYPE of the request (A, TXT,...ect) then:
// Execute some PHP codes to do some stuff (including connect to mysql database..ect)
// If the IP is TRUE, then return: (44.63.20.10     IN DNS_TYPE    X)

?>

I hope it clear for you.

I have my own PHP file, just need to know if it possible to do that? and if yes, then how? Any idea please?

Thanks.

Answer 1

You have to use BIND Full function API, that allows the 'plug-in' to replace BIND's internal database function for nominated zones and from BIND.

You will need to edit the BIND source files and makefile.in and then re-build BIND including your source and header files.

To start with he API, find file db.h which is located in the directory bind-release/lib/dns/include/dns/db.h where bind-release should be replaced with the location and version number where you unpacked the source distribution e.g. /usr/src/bind/10.1.2

Here is a copy http://pastebin.com/yTN5Aq03

Answer 2

With bind this is, as far as I know, not possible.

The solution that I would recommend is using powerDNS.

PowerDNS is more flexibel, and is able to use a database. I'm using it with a MySQL database for example.
Maybe that's directly what you want, maybe it isn't. But with the flexibility of using a database, you can create a PHP script that inserts everything in the database, and checks it, and so on.