Problem with ddns updates

stefan novak lms.brubaker at
Tue Sep 15 15:58:56 UTC 2009

Hello again!

I've got a Problem wir ddns updates. I want that cable modems from my
cisco ubr register with ddns.

my config as follow:

ddns-update-style interim;
ddns-updates on;

        algorithm hmac-md5;
        secret ***secret***;

zone {
        key DHCP_UPDATER;

zone {
        key DHCP_UPDATER;

host testmodem2 { hardware ethernet 00:22:3A:DC:36:49; fixed-address; filename "";
                    ddns-hostname "testmodem2";
                    ddns-domainname "";
                    option host-name "testmodem2";
                    option domain-name "";

subnet netmask {
        option routers;
        option broadcast-address;
        option time-servers;
        ddns-domainname "";

the bind name server is also configured correctly and i can make an
update via nsupdate cmdline.
the problem is that i don't see an update from the dhcpd server to the
bind server. only when i connect a client behind the cable modem ddns
updates are sent, which is usual not what i want :(

thans for your help,
kind regards Stefan

More information about the dhcp-users mailing list