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Old 11-19-2007, 10:22 PM   #1
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Registered: Nov 2007
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my ddns service is not update.

well, I config the DDNS server by learning the DHCP.conf's man.

The dns and dhcp service is ok.

but when I test the DDNS service , the dhcp work well,but DNS can not update.

the file of /var/log/messages tell this:

Nov 15 15:37:41 localhost dhcpd: DHCPDISCOVER from 00:50:56:c0:00:01 via eth0
Nov 15 15:37:42 localhost dhcpd: DHCPOFFER on to 00:50:56:c0:00:01
(liushumantou) via eth0
Nov 15 15:37:42 localhost named[2424]: client update 'mtls.c
om/IN' denied
Nov 15 15:37:42 localhost dhcpd: Unable to add forward map from liushumantou.mtl to timed out
Nov 15 15:37:42 localhost dhcpd: DHCPREQUEST for ( fro
m 00:50:56:c0:00:01 (liushumantou) via eth0

my DNS and dhcp is in one computer , Its ip is
the above ip is an ip,which a guest get .

The relation of the /etc/named.conf is :
algorithm HMAC-MD5;
secret qhB++OR5yWo8BTXwk/m4ng;

zone "" IN {
type master;
file "";
allow-update { key DHCP_UPDATER; };

zone "" IN {
type master;
file "";
allow-update { key DHCP_UPDATER; };

dhcp.conf is :

algorithm HMAC-MD5;
secret qhB++OR5yWo8BTXwk/m4ng;

zone {

zone {

the last: my dns is run by the named user, and dhcp is run by root.

help me ,thank you very much!
Old 12-26-2007, 08:31 AM   #2
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Registered: Oct 2004
Location: Houston, TX (usa)
Distribution: MEPIS, Debian, Knoppix,
Posts: 4,727
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1st, Welcome to LQ.

Sorry, no one else has tried to help you for so long.

I don't really know the solution, but I think I can guide you in re-working your post to fix its problems.

Please try to implement my suggestions by using the "Edit" button -- it's good practice.

  • Learn to use the "Code:" block feature for file contents & CLI output. You have at least 3 items in your post that should be in "Code:" blocks, please fix these. One of the reasons for using them is embodied in my phrase "at least 3" -- w/o them your post is so unclear I can't easily tell how many you need.
  • Fill in your profile & keep it up to date.
  • Which of the many DDNS services are you using?
  • How did you test it?
  • How do you know "The dns and dhcp service is ok."? -- How did you test that.
  • Does "the named user" mean "the user, named"? Remember, in English "named" is a perfectly good word that actually makes sense in your original sentence. In fact, I didn't think of what I now believe you really meant until approx. my 5th reading of your post.
  • Commas have spaces after but not before. Not a big deal, but your text is a bit jarring to the eye.

Hope someone will see this & your repaired post, & give you some help.


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