How to djbdns

Posted by Marius Voila on June 25, 2010 in London, U.K . — 0 comments This post contains 439 words

This is how to publish a simple zone with djbdns, I will be doing this on Ubunut 9.10. Start by installing djbdns.

# aptitude install djbdns

Create system accounts.

# useradd -d /etc/tinydns -s /bin/false tinydns
# useradd -d /etc/tinydns -s /bin/false tinylog

Now create the configuration directory for tinydns.

# tinydns-conf tinydns tinylog /etc/tinydns 10.0.0.10

10.0.0.10 is the IP Iâ€™ll be using in this example for my dns server. Now create a symlink so that svscan will start tinydns. svscan is a part of daemontools, which is a part of the djbdns package, it is used to start and monitor services.

# ln -s /etc/tinydns /etc/service/tinydns

Verify that the service has started.

# ps aux |grep tinydns
root      1126  0.0  0.0   1560   336 ?        S    17:41   0:00 supervise tinydns
tinydns   1128  0.0  0.0   1684   364 ?        S    17:41   0:00 /usr/bin/tinydns

Good, now weâ€™ll need to edit our data file, located at /etc/tinydns/root/data. The following is a simple data file for poller.se.

.mariusv.com:10.0.0.10:ns1.mariusv.com:86400
&mariusv.com;:10.0.0.20:ns2.mariusv.com:86400
+mariusv.com:10.0.0.100:3600
+www.mariusv.com:10.0.0.100:3600
@mariusv.com::aspmx.l.google.com:10:3600
@mariusv.com::alt1.aspmx.l.google.com:20:3600
@mariusv.com::alt2.aspmx.l.google.com:20:3600
@mariusv.com::aspmx2.googlemail.com:30:3600
@mariusv.com::aspmx3.googlemail.com:30:3600
@mariusv.com::aspmx4.googlemail.com:30:3600
@mariusv.com::aspmx5.googlemail.com:30:3600

Each line starts with a character, the characters above does the following.

. creates a NS record for mariusv.com (ns1.mariusv.com) and also creates a A record for ns1.mariusv.com. A SOA record is also created. & creates another NS record for mariusv.com (ns2.mariusv.com) and also creates a A record for ns2.mariusv.com.

creates A records @ creates MX records, second argument can contain a IP address (a A record is then created), not needed in our example since I use gmail.

You can find more info in this here.

Now create the data.cdb file, this is a read optimized file that tinydns uses.

# cd /etc/tinydns/root/
# make

Verify that your server answers requests.

# dig @10.0.0.10 soa mariusv.com

; <<>> DiG 9.6.1-P1 <<>> @10.0.0.10 soa mariusv.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63331
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;mariusv.com.			IN	SOA

;; ANSWER SECTION:
mariusv.com.		2560	IN	SOA	ns1.mariusv.com. hostmaster.mariusv.com. 1263665910 16384 2048 1048576 2560

;; AUTHORITY SECTION:
mariusv.com.		86400	IN	NS	ns1.mariusv.com.
mariusv.com.		86400	IN	NS	ns2.mariusv.com.

;; ADDITIONAL SECTION:
ns1.mariusv.com.		86400	IN	A	10.0.0.10
ns2.mariusv.com.		86400	IN	A	10.0.0.20

;; Query time: 0 msec
;; SERVER: 10.0.0.10#53(10.0.0.10)
;; WHEN: Sat Jan 16 18:28:35 2010
;; MSG SIZE  rcvd: 142