DNS - reverse lookup data..

Were in the process of migrating from 2008 to 2012 domain.  I have noticed that the reverse lookup zone data is half the amount of records that the .local domain under forward lookup zone is.

Is this incorrect?

Thanks
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CHI-LTDAsked:
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CHI-LTDAuthor Commented:
To add, I noticed this as one of my NAS devices failed to work by hostname over a different vlan.  Unsure if related.

I have noticed that under the reverse lookup zones on the local DNS server cannot find the IP address.  I have to edit and resolve it.  Probably not related..?
footechCommented:
Reverse records are rarely required.  In fact the only time I can think of off-hand is for sending email, and even then it's not necessarily required but often checked as an anti-spam measure.  I can't think of anything for internal AD records.  However, they are very often a convenience to have.

So, I wouldn't be concerned by mismatch in numbers.  If you want to dig further into it though, see if the A records that were created statically have corresponding reverse records as this is an option that can be checked when creating the A record.  For devices that get their IP from DHCP, it is the DHCP server that creates the PTR record.  If the zone is set to allow only secure dynamic updates, then if your DHCP server is not a domain member then it won't have the permissions to register the records.  For machines that are set statically, they are responsible for registering their records, and again  if they are not a domain members then they won't have the permissions to register the records.  So you have a whole interaction between what types of updates are allowed, permissions, etc.

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CHI-LTDAuthor Commented:
okay thanks.
i have changed the DNS servers on the NAS from 2008 to 2012 DCs and its now added a PTR in DNS.

Will look into desktops....
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CHI-LTDAuthor Commented:
if i run the nslookup tool from within DNS it opens using ipv6..?
CHI-LTDAuthor Commented:
so disabling the dhcp scope on a machine that wasnt showing PTR, the machine picked up different ip nad created ptr record..
the other mahcine that was in dns reverse with prt now doesnt show its record (i disabled the dhcp scope on the other box)...
footechCommented:
Current Windows OSes will use IPv6 over IPv4 by default.

A DHCP scope is what you set up on the server to define a range of IPs and the options to hand out.  I really don't know what your last post is saying.
CHI-LTDAuthor Commented:
so by disabling one of the two scopes on the server, i found that one is creating a PTR record.  The other server inst.
Both are configured exactly the same from what i can see..
footechCommented:
I'd suggest the following to help you configure DHCP.
http://blogs.msmvps.com/acefekay/2009/08/20/dhcp-dynamic-dns-updates-scavenging-static-entries-amp-timestamps-and-the-dnsproxyupdate-group/

Make sure both servers are using the same credentials in DHCP to register DNS records.  That way there won't be a problem with one DHCP server overwriting/updating records that were created by the other server.
CHI-LTDAuthor Commented:
we think it was actually to do with proxying web traffic over vpn..
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