This is the answer we want to give. This query is used by allowzonexfr in the Postgres driver. This bug affects 2 people. It’s well documented, widely used and is easy to implement. So you want to use dynamic loadable zones DLZ, http: Like the findzone query, the results returned by the allowzonexfr query are not really used, so what you return and in what order doesn’t really matter.

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The “search” option in this example can be omitted, as poshgres is the default value. The example below is using dynamic linking via dlopen:. Fortunately, the number of spaces in between doesn’t matter, as long as there is at least one. And now, with DLZ, it doesn’t have to. The first “-g” tells BIND to write all log messages to stdout instead of a log file. Thus, the zone data is “dynamically loaded” from the database as needed. DLZ support is fully integrated into dz, you just need to enable it when running.

Bind9 and PostgreSQL

The last piece on the line is the number “2”. February 15th, 7. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Post as a guest Name.


It is important that the brackets have no spaces. If at least 1 row is returned, then the dla does support the zone, and thus is authoritative for it. This parameter is required and located at argv[3].

Bookmarks Bookmarks Digg del. Now that we have covered all the different types of queries that can be used by the Postgres driver, we can discuss the number, type and order of fields returned by the dls.

It is explained more below.

Installing bind9 with DLZ on Ubuntu

An explanation dpz how fields are used and concatenated together is detailed below. A DNS server should always be ready to answer an onslaught of queries with all of its resources available.

The time now is If the result set for a elz or authority query only has two fields, the driver will use the default value of for ttl. This is correct operation, and BIND will be able to understand and use this data.

This parameter is located at argv[1] and is required. A DLZ database is configured with a dlz statement in named.

The query must use the correct pre-defined tokens. If zero rows are returned, the database does not support the zone i. Click here for more info. Your database can hold these fields as strings or numbers, plstgres they MUST be able to be properly parsed into a number without any extra characters. Lookup and authority operate in a manner similar to allnodes.


This driver has been built specifically to avoid that problem.

When answering a query, all DLZ modules with the “search” option set to “yes” will be checked for an answer, and the best available answer will be returned to the client. My tutorial changes that.

Using DLZ in BIND

This parameter is required and located at argv[4]. In that case, you would ppstgres the search to “no” so that this DLZ module is slz searched for best-match when a query is received. The driver then appends a space to the end of the string and continues to the next field.

If your lookup query will be returning TXT dns records be sure to wrap your TXT data with double quotes before returning the data. Join Date Oct Beans