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you could just write a script to parse the log and use nsupdate to
delete the A records of hosts that fail, allowing DHCP to replace them
on the next renew of the lease. It would be much quicker that trying to
hand craft the hash<br>
<br>
Doug<br>
<a class="moz-txt-link-abbreviated" href="http://www.ovationdata.com">www.ovationdata.com</a><br>
<br>
Glenn Satchell wrote:
<blockquote cite="mid:200804211509.m3LF9QQf015908@mail.uniq.com.au"
type="cite">
<pre wrap="">That's correct in the simple case.
You could work your way through the source to see how it calculates the
value that gets placed in the corresponding TXT record and then
manually create all of those, but it would be a non-trivial exercise
even for a small network.
This is all covered in the dhcpd.conf man page in the section titled
"THE INTERIM DNS UPDATE SCHEME".
regards,
-glenn
</pre>
<blockquote type="cite">
<pre wrap="">Date: Mon, 21 Apr 2008 07:47:45 -0700 (PDT)
From: frank miller <a class="moz-txt-link-rfc2396E" href="mailto:frankkmiller@yahoo.com"><frankkmiller@yahoo.com></a>
So you can't deploy DynDNS where you already have DNS
entries without deleting them all ??
</pre>
<blockquote type="cite">
<pre wrap="">Probably the best way to get around this is to
delete the existing A
record from DNS, then let dhcpd dynamically add it's
own records.
Doing a release and renew on the client should be
enough to force the
DNS update.
For forward records it adds the A record, plus a TXT
record which
contains a hash of various identifiers (the DHCID)
so that dhcpd can be
sure that next time it's updating a record that it
put into the DNS
zone. The idea is to stop someone naming their PC
with the same name as
an existing system, such as your Very Important
Server, and modifying
the DNS entry.
regards,
-glenn
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