Unable to add forward map...

Todd Snyder tsnyder at rim.com
Mon Sep 17 20:57:24 UTC 2007


I have almost successfully setup DHCP to update DNS zones on lease, but
in my messages file I am seeing:

Unable to add forward map from sbp6003.china.prov.tools.staging to timed out
No hostname for

I've found a couple sites that indicate that this is because dhclient
isn't sending the right information to the server to allow an update
properly.  One says that there isn't a trailing "." after the FQDN.  But
when I look at the dhclient.conf on the server in question, it's
indicating the file is dynamically generated by ifup. The line is here:

send host-name "sbp6003";  # temporary RHL ifup addition

I'm not sure if the problem lies in my dhcp config, or my named config.

Any assistance would be greatly appreciated - I've kind of hacked this
together without a full understanding of whats going on, so theres a
good possibility I've missed something obvious :)



Relevant parts of my dhcp.conf

ddns-update-style interim;
key dns {
        algorithm HMAC-MD5.SIG-ALG.REG.INT;
        secret "mykeyishere";
zone prov.tools.staging. {
        key dns;
zone 0.0.127.in-addr.arpa {
        key dns;
zone 19.16.17.in-addr.arpa {
        key dns;
zone 19.255.10.in-addr.arpa {
        key dns;

subnet netmask {
        get-lease-hostnames true;
        do-forward-updates true;
        option subnet-mask;
        option routers;
        option domain-name "china.prov.tools.staging";
        default-lease-time 1800;
        max-lease-time 86400;
        option vendor-class-identifier "PXEClient";
        allow unknown-clients;

This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.

More information about the dhcp-users mailing list