reading IP address given via DHCP

Michael Torrie torriem at
Fri Sep 27 16:16:55 MDT 2013

On 09/27/2013 05:42 AM, Dan Egli wrote:
> I'm familiar with the ddns ability in dhcpd and named. In fact, at first I
> was going to use them. But my understanding was that ddns doesn't update
> the reverse pointers. I.e. it will insert a record into the DNS server that
> box A is, but it won't insert the PTR to say that
> is box A in the zone. That's why I use the scripted method I
> devised. Now if the ddns method DOES update the reverse pointers, that's
> different. And then there's the point where I'd ask how well DHCPd would be
> at applying changes to forward FILE A and reverse file A vs. forward file B
> and reverse file A. Remember that there's two networks, each with
> independent address ranges. But the way it's setup so far is that although
> the DNS would contain two zone files for the address pointers (i.e.
> a.upper.rec and a.lower.rec) there is only one zone file for the
> reverse pointers. I don't know how well ddns would work that
> way.

ISC DHCPD absolutely does update both forward and reverse ptrs.

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