Howto install djbdns with autoaxfr

If you like to setup autoaxfr with djbdns, maybe this howto will help you.

First of all, I assume that you have already installed ucspi-tcp and daemontools. If not, look at D.J. Bernsteins Webseite
http://cr.yp.to and install it.

After that, you will have to download autoaxfr and the djbdns Package.
What I’m doing is a basic installation. If you need IPv6 support, watch out, there will be a patch somewhere for djbdns.

Now, add the necessary users:

groupadd dns
useradd -g dns -s /bin/false dnscache
useradd -g dns -s /bin/false tinydns
useradd -g dns -s /bin/false dnslog
useradd -g dns -s /bin/false axfrdns
useradd -g dns -s /bin/false autoaxfr


dnscache

First of all, we install dnscache to 127.0.0.1

dnscache-conf dnscache dnslog /etc/dnscache 127.0.0.1
If you like to distribute dns service to other machines in your network, add a real ip address.
WARNING: You can only use dnscache or tinydns on ONE ip address.

If you need dnscache to resolv domain names for other machines in your network, add the network or every machine by doing this.
touch /etc/dnscache/root/ip/192.168.0

Now it’s time to activate your dnscache.
ln -s /etc/dnscache /service

tinydns

You will need tinydns if you like to play dns server for domains.
First of all, configure it:
tinydns-conf tinydns dnslog /etc/tinydns 212.89.98.32
Use the external ip address, the server should be reachable at.

Now it’s time to setup autoaxfr.
autoaxfr-conf autoaxfr dnslog /etc/autoaxfr

You will now have to edit the file /etc/tinydns/root/Makefile
Replace everything with this:
data.cdb: data
/usr/local/bin/tinydns-data

data: mydata axfrdata
cat $^ > $@

axfrdata: /service/autoaxfr/root/zones/*
sort -u $^ > $@

Don’t forget to add the file mydata & axfrdata:

touch /etc/tinydns/root/axfrdata
touch /etc/tinydns/root/mydata

After every change of data, a secondary dns or whatever, you’ll have to type make in /etc/tinydns/root/
Just automate this with a cronjob.

*/10 * * * * cd /etc/tinydns/root && make > /dev/null 2>&1

Let’s start tinydns and autoaxfr.

ln -s /etc/tinydns /service
ln -s /etc/autoaxfr /service

Goto /etc/autoaxfr/root/slaves.
Add every domain you would like to distribute as secondary dns by adding the domain name as filename and the ip address of the primary dns controller as content in the file.

Example:
vi test.com
123.123.123.133

DONE! That’s the basic.

If you like to play primary dns server you’ll have to install axfrdns.
axfrdns-conf axfrdns dnslog /etc/axfrdns /etc/tinydns 212.89.98.32
Use the same ip address as for tinydns.

Set the servers that are allowed to be secondary dns servers.
cd /etc/axfrdns
vi /etc/axfrdns/tcp


insert to following.

122.22.22.22:allow
:deny


You can restrict that to networks, domains and so on. For that, see the axfrdns manuel from djb.

After you have changed the file, type make.

Start axfrdns.

ln -s /etc/axfrdns /service

Comments, questions, whatever are welcome.

One Response to Howto install djbdns with autoaxfr

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