why am I seeing update denied in Bind9 logs for dhcp clients ?
Simon Hobson
dhcp1 at thehobsons.co.uk
Fri Mar 2 11:35:26 UTC 2012
Gregory Machin wrote:
>I have a ddns configuration with the dhcpd server writing dhcp clients
>hostname and ip to the bind9 dns server. But i'm seeing a lot of
>dhcp clients trying to writing into zones
Windows clients by any chance ?
> zone "69.168.192.in-addr.arpa" {
> type master;
> file "/var/lib/bind/192.168.69.interenal.rev";
> update-policy { grant dhcp-server-key subdomain
>69.168.192.in-addr.arpa. ANY;
> grant * self * A TXT;
> };
> };
All I have is :
zone "0.168.192.in-addr.arpa" in {
allow-update { key DHCP_UPDATER ; };
file "192.168.0";
type master;
};
Default on Windows clients is for the client to attempt to update the
DNS - because "that's the way MS does it". You need to add "deny
client-updates" (I think, check the man page) to your DHCP config for
it to ignore clients requests to do their own updates.
--
Simon Hobson
Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
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