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MYSQL DLZ DRIVER

This string must be in the proper format for BIND to use it properly. Double quotes could not be used, as the entire DLZ command line is already inside of double quotes and the escaping would be nasty. Also, the number of fields returned by the lookup query can very from 1 to an unlimited number of fields. If only one query is supplied, zone transfers will fail! The MySQL connect function doesn’t accept a “connection string”.

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How to install Bind-DLZ on Linux

This line is indented just to make it easier to read the myaql file. Braces can be used inside of DLZ command lines to group several items together into one parameter. This parameter is optional and always located at argv[5]. Next, download and extract the Bind sources: The last parameter is “data”.

Bind-DLZ with MySQL

The keyword “database” is myslq only parameter that can be specified in a DLZ configuration segment. In order for the fields to be interpreted properly by the driver, they must be in the correct order. I use a database called postfix since my setup is tightly coupled with email routing and replication from the email dlx. If your lookup function will return SOA and NS data, and you will not be using an authority query, you still need to specify an empty authority query so that the allnodes query will be located at argv[6].

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Bind-DLZ with MySQL – ITSA Consulting, LLC

Sometimes, though, we want to return data that is NOT relative to the zone. Another important point is that the MySQL driver uses relative data. Notice the space at the beginning.

A mgsql script then creates the necessary entries in the postfix database to allow mail routing to occur. This function takes five parameters and has the following signature:. Field 1 is the left most field in a SQL query.

The first parameter “lookup” is used internally by the driver and BIND so you can just ignore it. If the result set for a lookup or authority query has more than three fields, the driver will not use any default values.

The chart below shows 12 fields but not all fields are required in all queries. The only limitations are:.

The case capitalization of the word “trUe” does not matter. Fortunately, the number of spaces in between doesn’t matter, as long as there is at least one. This string must be in the proper myswl for BIND to use it properly. Instead of imposing a database schema, the driver accepts SQL queries with a few special tokens as parameters.

In order to support zone transfer, you must specify an allnodes AND an allowzonexfr query. Notice that the command line is actually broken over many lines. I would suggest that you be sure that you are using the named binary that you compiled by executing named with the fully qualified path, ie: That is caused by the other fields in the row being NULL.

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This is the third token discussed previously.

How many fields are returned is also of great importance. This tells BIND that the domain name is absolute, and not to be used relative to our zone mysqql “example.

You are still responsible to make sure the query is correct once the tokens have been replaced. The allnodes query is actually the simplest to understand because it makes use of all the fields and has the fewest options.

Double quotes could not be used, as the entire DLZ command line myssql already inside of double quotes and the escaping would be nasty. As you can see, I simply included the following configuration portion as named. The fields must be in that order, and the data field or fields concatenated together must hold the remainder of any data required for that DNS record type. If only one query is supplied, zone transfers will fail!