* <dusan.djordjevic@xxxxxxxxxx> [2005-08-30 08:58 +0200]:
> I run DNS and DHCP on Red Hat ES v3, with all updates. I want to
> update DNS tables from DHCP, so whenever client gets IP address from
> DHCP, it will automatically add it to DNS.
>
> Here is relevant part from named.conf:
>
> zone "pmsl.sd" {
> allow-update { 127.0.0.1; lan; };
> type master;
> file "pmsl.sd.zone";
> };
> lan is ACL for local network.
>
> DHCP configuration:
> ddns-update-style interim;
>
> and in subnet part:
> option domain-name-servers 158.29.212.26;
>
> but still I have this message in logs (and of course, DNS is not updated):
>
> Aug 30 08:38:56 pmsl dhcpd: Unable to add forward map from krtws024.pmsl.sd to
> 158.29.212.100: connection refused
Your setup looks right.
For better security, you should use TSIG-authentication
("keys"-directive).
Hints:
- ddns-update is quite a new option, so always try the latest
version of dhcpd .
- Do the DNS- and the DHCP-server run on the same machine?
What's the definition of your "lan"-ACL?
- On the DNS server, turn on query-logging ("rndc querylog") and watch
syslog ("tail -f /var/log/messages &") while trying to update the
DNS (see next hint).
- Does BIND accept updates you send using the "nsupdate"-command?
$ nsupdate
> server 158.29.212.26
> zone pmsl.sd
> update add krtws024.pmsl.sd 60 A 158.29.212.100
> send
> quit
Please try this from both the DNS- and the DHCP-server.
- as always, tcpdump is your friend...
Good luck!
--
Johannes Franken
Professional unix/network development
mailto:jfranken@xxxxxxxxxxx
http://www.jfranken.de/
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