Re: Antwort: DDNS and DHCP updates failing

> Hi Gareth,
> to get more infos please put the following line in your dhcpd.conf:
>
> log-facility local1;
>
> and configure your syslogd corrensponding to that., e.g.
>
> local1.debug /var/log/dhcpd.log
>
> Maybe you will find more output for troubleshooting!
>
> HTH!
>
> Kind Regards/Freundlichen Gruß
>
> Holger Honert
>
> KOMN-97851
>
> SIGNAL IDUNA Gruppe
> Joseph-Scherer-Str. 3
>
> 44139 Dortmund
>
> Phone: +49 231/135-4043
> FAX: +49 231/135-2959
>
> mailto: holger.honert@signal-iduna.de
>
>
>
>
>
>
> ccx264@coventry.ac.uk (Gareth Ansell)
> Gesendet von: bind-users-bounce@isc.org
> 12.01.2005 12:45
>
> An: comp-protocols-dns-bind@isc.org
> Kopie:
> Thema: DDNS and DHCP updates failing
>
>
> Hi,
>
> This may be a bit off topic, as it is to do with ISC dhcpd, not bind,
> but I couldn't find a group for dhcpd, and the topics are closely
> related.
>
> We have a DHCP/DDNS setup (bind-9.2.3 and dhcp-3.0pl2 on a slackware
> box),
> which has been working OK, but it has now stopped. There have been no
> updates to the servers, and no modifications (which I know of) to the
> configuration files.
>
> The problem appears to be that DHCP is no longer sending out update
> messages to the DNS server. The DNS server appears to be working OK,
> and will update using nsupdate OK. The really curious thing about
> this is, that if you grep the log files, the DHCP does do the
> occasional update, about 1 a day or so. However, it should be doing
> much much more than this.

Why do you think this? Updates should occur when there is
a new lease or lease expired. If you have long leases
clients can be off overnight and still not generate any
UPDATE requests when they reboot as they just renew their
lease.

> This is an example from the named.conf file
>
> zone "dhcp.coventry.ac.uk" {
> type master;
> file "dhcp/dhcp.coventry";
> allow-update {localhost; key DHCP-DNS.;};
> allow-transfer { key dns1-dns2.; xxx.xxx.xxx.xxx;
> xxx.xxx.xxx.xxx; };
> };
>
>
> This is what we have in the dhcpd.conf for the above zone
>
> ddns-updates true;
> ddns-update-style interim;
> ddns-domainname "dhcp.coventry.ac.uk";
> ddns-hostname = pick(host-decl-name, option host-name);
> ddns-ttl 86400;
> deny client-updates;
>
> zone dhcp.coventry.ac.uk. {
> primary 193.61.107.176;
> key DHCP-DNS.;
> }
>
> I have turned on the debugging for named, which showed that it was
> not receiving any update messages, and a tcpdump showed that none
> were being send by dhcp.
>
> Has anyone experienced this before? Does anyone know how to ramp
> up the logging on the DHCP server to try to get any more info, is
> this a really obvious config problem which I am missing?
>
> Any help greatly appreciated.
>
> Gareth Ansell
>
>
>
>
>
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@isc.org