Re: No glue on MX and NS requests.

Adding glue for MX / NS records is optional and not required for proper function of a DNS server.

It's not a bug in the DLZ code, I specifically haven't added support for that capability, just like there isn't support for RFC 2136 dynamic updates.

Also, the glue functionality really doesn't belong in DLZ.  Database drivers should make the data available to Bind, the logic for adding glue should be within a higher layer of Bind and not in the DB layer, as it appears to be now in the in-memory Bind DB implementation.

Rob

----- Original Message ----
From: Graham Weldon <[email protected]>
To: [email protected]
Sent: Monday, February 25, 2008 8:10:09 PM
Subject: Re: [Bind-dlz-testers] No glue on MX and NS requests.

Fluid Lino [web design + development]


 
BODY {
FONT:10px/16px Arial, Helvetica, sans-serif;COLOR:#888888;TEXT-DECORATION:none;}
P {
FONT:10px/16px Arial, Helvetica, sans-serif;COLOR:#888888;TEXT-DECORATION:none;}
TD {
FONT:10px/16px Arial, Helvetica, sans-serif;COLOR:#888888;TEXT-DECORATION:none;}
BODY {
PADDING-RIGHT:10px;PADDING-LEFT:10px;PADDING-BOTTOM:10px;PADDING-TOP:10px;}
P {
PADDING-RIGHT:0px;PADDING-LEFT:0px;PADDING-BOTTOM:0px;MARGIN:0px 0px 15px;PADDING-TOP:0px;}
TD {
PADDING-RIGHT:0px;PADDING-LEFT:0px;PADDING-BOTTOM:0px;MARGIN:0px 0px 15px;PADDING-TOP:0px;}
A {
COLOR:#005d90;TEXT-DECORATION:none;}
A:hover {
COLOR:#3399cc;TEXT-DECORATION:underline;}
A:active {
COLOR:#3399cc;}
.logo {
CLEAR:both;PADDING-RIGHT:0px;DISPLAY:block;PADDING-LEFT:0px;PADDING-BOTTOM:0px;MARGIN:0px 0px 25px;PADDING-TOP:0px;WHITE-SPACE:nowrap;}



To explain 
this further, I am running DNSReports on the domain in question via 
DNSStuff.com

 

Its 
returning the MX entries for the domain without issue, but the returned results 
do not contain the A records matching the listed MX entries.

 

Eg:

 

@ IN MX 10 
mx1.domain.com
@ IN MX 20 mx2.domain.com

A request for MX entries 
returns something similar to that.

However, to 
speed up DNS, and allow resolution without subsequent requests, we should be 
able to respond to a request for MX records with accompanying A 
records:

 

@ IN MX 10 mx1.domain.com
@ IN MX 20 
mx2.domain.com
mx1 IN A 1.2.3.4

mx2 IN A 9.8.7.6

 

Any thoughts on how I can do 
this?

Current SQL Queries are as follows (colored to match 
website SQL coloring for MySQL: http://bind-dlz.sourceforge.net/mysql_driver.html): 


 

 

dlz "MySQL 
Zone" {
        database 
"mysql
        {host=localhost 
dbname=dbname user=user pass=pass}
        
{SELECT DISTINCT 'DOMAIN_EXISTS' FROM `dns_zones` WHERE `domain_name` = 
'%zone%'}
        {SELECT `ttl`,`type`,`mx_priority`,IF (`type` = 'TXT', 
concat('\"', `data`, '\"'), `data`) FROM `dns_records` LEFT JOIN `dns_zones` ON 
`dns_records`.`dns_zone_id` = `dns_zones`.`id` WHERE `domain_name`='%zone%' AND 
`host`='%record%' AND NOT (`type`='SOA' OR 
`type`='NS')}
        {SELECT 
`ttl`,`type`,`mx_priority`,`data`,`contact`,`serial`,`refresh`,`retry`,`expire`,`minimum` 
FROM `dns_records` LEFT JOIN `dns_zones` ON 
`dns_records`.`dns_zone_id`=`dns_zones`.`id` WHERE `domain_name`='%zone%' AND 
(`type`='SOA' OR `type`='NS') ORDER BY `type` 
DESC}
        {SELECT `ttl`,`type`,`mx_priority`,IF 
(`type` = 'TXT', concat('\"', `data`, '\"'), 
`data`),`contact`,`serial`,`refresh`,`retry`,`expire`,`minimum` FROM 
`dns_records` LEFT JOIN `dns_zones` ON 
`dns_records`.`dns_zone_id`=`dns_zones`.`id` WHERE `domain_name`='%zone%' AND 
NOT (`type`='SOA' OR 
`type`='NS')}
        {SELECT DISTINCT 'ALLOW_TRANSFER' FROM 
`dns_transfers` LEFT JOIN `dns_zones` ON `dns_transfers`.`dns_zone_id` = 
`dns_zones`.`id` WHERE `domain_name`='%zone%' AND 
`client`='%client%'}
        
{INSERT INTO `dns_queries` 
SET `domain_name`='%zone%'}";
};


 

Cheers,

 

Graham Weldon

 

Fluid Lino
(02) 4927 
5337
(0407) 017 293
[email protected]
www.fluidlino.com.au

 




From: 
[email protected] 
[mailto:[email protected]] On Behalf Of 
Graham Weldon
Sent: Tuesday, 26 February 2008 11:35 
AM
To: [email protected]
Subject: 
[Bind-dlz-testers] No glue on MX and NS requests.







Hi all,

Just running a few DNS reports on 
the domains hosted on our systems, and I am noticing that requests for NS and MX 
records do not return the corresponding A records.
Is this something that should be done, and 
is it something that I can simply configure by re-writing my SQL 
statements?

Appreciate any 
help.

Cheers,

 

Graham Weldon

 

Fluid Lino
(02) 4927 
5337
(0407) 017 293
[email protected]
www.fluidlino.com.au

 


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