DynEinsle

DynEinsle is a dynamic dns client using bind as dyndns server.

Download

Here you can download the actual version of dyneinsle: http://debian.einsle.de/debian/pool/main/d/dyneinsle/

Installation

The installation on debian is as simple as:

dpkg -i dyneinsle_*_all.deb

Configuration

Client

• Install dyneinsle as seen on the Topic above
• create a key like described on Documentation, and configre it on server side.
• copy /etc/dyneinsle.conf to /etc/dyneinsle.conf.local
• edit /etc/dyneinsle.conf.local, don't forget to enable the service
• done, Service will run as Cron-Job

Server

• Add the key created on client to servers zone-file (As described on Documentation)
• Add a configline to bind (/etc/bind/named.conf.local) (As described on Documentation)
• Restart Bind

Documentation

Create key

To create a new dynamic-dns-key you can use dnssec-keygen out of debians bind9utils package:

dnssec-keygen -a RSASHA1 -b 4096 -T KEY -r /dev/urandom -n host xxx.dyn-home.de

This creates 2 new Files, 'Kxxx.dyn-home.de.*.key' and 'Kxxx.dyn-home.de.*.private'. The .key file should be integrated into master dns zonefile, the .private is used on the client.

Integrate Bind (Server)

To integrate the new zone into the master bind zonefile, you must extend 2 Files.

First you should extend the zone-config:

...
type master;
update-policy {
    ...
    grant|deny identity matchtype name [rr];
    grant xxx.dyn-home.de subdomain xxx.dyn-home.de. A;
    ...
};

Documentation about it can be found at: http://www.zytrax.com/books/dns/ch7/xfer.html#update-policy

The second is to integrate the newly created key into the zonefile:

xxx                   A       188.174.59.210
$TTL 3600       ; 1 hour
                      KEY     512 3 5 (
                              <KEY-TEXT>
                              ) ; key id = 586

Setup at Client

To update the zoneinfo on Server you can use the scritp above to download or you can use this simple script:

#!/bin/sh
#
# Script zum Updaten der IP
#
# (c) Robert Einsle <[email protected]>
#

KEY="/etc/dyn/Kxxx.dyn-home.de.+003+31559.private"
NAME=xxx.dyn-home.de.

IP=`curl --silent http://ns-dyn-home.de/ip.php`

#echo "Updating $NAME mit ip: $IP"
/usr/bin/nsupdate -k $KEY << EOF
server ns-dyn.dyn-home.de
update delete $NAME A
update add $NAME 60 A $IP
send
EOF

Cron

To let automatically update cron the service you can use this script:

*/15  *  *  *  *        /usr/local/bin/update-dns.sh > /dev/null