LinuxQuestions.org - BIND9 CNAME/A Records

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BIND9 CNAME/A Records

So, I've got Bind9 running and configured on a router which acts as the DNS for my LAN.

I want to setup so that when I resolve a hostname, it goes to a certain IP.

I currently have:

Quote:

$ORIGIN home.mydomain,com. ; designates the start of this zone file in the namespace
$TTL 1h ; default expiration time of all resource records without their own TTL value
;
; BIND data file for mydomain,com
;
;$TTL 604800
IN SOA home.mydomain,com. home.mydomain,com. (
2011120301 ; Serial
7200 ; Refresh
120 ; Retry
2419200 ; Expire
604800) ; Default TTL
;

IN NS localhost.

ns A 10.0.0.1
home.mydomain,com. IN A 10.0.0.1
voip.mydomain,com. IN A 10.0.0.11
voip IN A 10.0.0.11
;winpc IN A 10.0.0.4
;voip. mydomain,com. CNAME home.mydomain,com.
;ld IN CNAME hotmail,com.

All hostnames work in my current search domain ($ORIGIN) (So, for example, if I ping winpc, it will resolve to 10.0.0.4)

I can also type in ld and it will resolve to hotmail,com.

If I type in home.mydomain,com, it resolve to 10.0.0.1 (Or what ever I set it to), however, if I type in voip.mydomain,com, or any other TLD, or sub-domain, it resolves to what ever my ISP would.

So, it's only resolving home.mydomain,com, or what ever else I place in the $ORIGIN correctly.

Is there any way to configure BIND9 to do A records, or CNAME records for all domains?

Basically, I want it to look in its own internal records, before requesting from the internet, if it can't find a record, then request from ISP.

Hi,

Using FQDNs followed by the tailing dot in the zone file should work. With just hostname, the record is composed by as hostname.$ORIGIN. So in your case you have records like: voip.home.mydomain,com and so no.
For this you should use "mydomain,com" as the zone name in named.conf and no $ORIGIN in the zone file.

Regards

Hey Bathory,

I changed the zone, and the zone file named.conf.local was pointing to.

I also changed the name of the zone db file in /etc/bind/zones/master to reflect just mydomain.com (So it was mydomain.com.db). I also commented out the $ORIGIN line in the zone file.

I restarted bind9, and then cleared the DNS cache on my Windows machine. I tried pinging voip.mydomain.com on both my Windows machine, and the Linux server.

It still resolves to the external IP address.

I also tried adding in:

Quote:

example.com. IN A 10.0.0.1

But it resolved to 192.0.43.10 (Which is its normal IP).

Not sure where I'm going wrong.

Please note, mydomain.com is in place of another domain I currently own. There's a subdomain called voip on it which I setup on the hosting.

Quote:

I also changed the name of the zone db file in /etc/bind/zones/master to reflect just mydomain.com (So it was mydomain.com.db). I also commented out the $ORIGIN line in the zone file.

Why change the filename? And if you add/edit records, you should increase the serial number.

Quote:

I tried pinging voip.mydomain.com on both my Windows machine, and the Linux server.

Are you sure your windows boxes are using your nameserver as a resolver?
If you're still in error, please post the new zonefile, along with the zone definition in named.conf.

Hey Bathory,

I changed it because:

Quote:

zone "home.mydomain.com" {
type master;
file "/etc/bind/zones/master/home.mydomain.com.db";
};

To:

Quote:

zone "mydomain.com" {
type master;
file "/etc/bind/zones/master/mydomain.com.db";
};

In named.conf.local

Yes, I'm 100% sure they are. I checked with ipconfig /all

I will update the serial number shortly and get back to you.

Thanks!

Some solutions are

1. Restart the named service otherwise the configuration will not get updated.
2. Make sure that the zone file is readable by named user.