bind2samba: A converter for BIND zone files to samba-tool invocations

About

This tool assits when converting an old zone file to a DNS zone run by a Samba Directory Controller. It can read the zone file and turn its contents into invocations of samba-tool dns add .... It understands A, AAAA, CNAME, and MX records. In addtion, one can give subnets in CIDR notation; if A/AAAA records match the subnets given, reverse PTR records are also created.

Invocations

Suppose you have the following zone file:

$ORIGIN example.com.
$TTL    3d

example.com. IN      SOA     ns1.example.com. hostmaster.example.com.
(
        2018022301                  ; Serial
        1h                          ; Refresh
        15m                         ; Retry
        2w                          ; Expire
        1h)                         ; Negative TTL

example.com.     IN      NS      galathea-bond0.example.com
example.com.     IN      MX      10 mx


;
; Local, trusted network:
;

charon          IN      A       172.16.5.1
charon          IN      AAAA    2001:170:1243:1::1

You can feed it directly to bind2samba:

% bind2samba example.com.db
I would run the following commands:
samba-tool dns add localhost example.com @ MX mx.example.com 10
samba-tool dns add localhost example.com charon A 172.16.5.1
samba-tool dns add localhost example.com charon AAAA 2001:170:1243:1::1

Supplying subnets will create PTR records, too:

% bind2samba \
    --ipv4-subnet=172.16.0.0/12 \
    --ipv6-subnet=2001:170:1243::/48 \
    minimal-example.com.db
I would run the following commands:
samba-tool dns add localhost example.com @ MX mx.example.com 10
samba-tool dns add localhost example.com charon A 172.16.5.1
samba-tool dns add localhost 16.172.in-addr.arpa 1.5.16.172.in-addr.arpa PTR charon.example.com
samba-tool dns add localhost example.com charon AAAA 2001:170:1243:1::1
samba-tool dns add localhost 3.4.2.1.0.7.1.0.1.0.0.2.ip6.arpa 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.0.3.4.2.1.0.7.1.0.1.0.0.2.ip6.arpa PTR charon.example.com

Multiple subnets can be given, the best matching will then be used.

The tool can also provide you with single commands without seeing a full SOA record, because --zone example.com is also a command line option. Then, you can simply feed records on stdin to it:

echo 'charon IN A 172.16.5.1' | ../src/bind2samba --zone=example.com

In general, running bind2samba --help gives the full list of arguments, as any well-behaved tool should.

Reporting bugs, feature wishes, and contributing

The project's website is https://github.com/eveith/bind2samba, but bug reports, feature wishes, or patches can also just e-mailed to eveith+bind2samba@binericien.org.