Update associated pointer record

Question

_{Monday, November 7, 2016 4:41 PM}

We have Windows 2012 R2 domain controllers with AD integrated DNS configured on all domain controllers. On one the domain controller "Update associated pointer(PTR) record" in not check marked for any of the clients and client reverse lookup is not updating. On other domain controllers, the it is check marked. Dynamic DNS update is configured on DHCP server ( same server) with "Secure Only"

How to correct the DNS server, so that "Update associated pointer(PTR) record" is always check marked and reverse look up updates records?

Thanks in advance...

Tek-Nerd

All replies (7)

_{Tuesday, November 8, 2016 2:08 AM}

Hi Tek-Nerd,

In order to do dynamic update for DNS A and PTR records, you may check the following things:

1. On the DHCP server that register DNS records for clients

2. Add DHCP server to DnsUpdateProxy group in ADUC, this is due to "Secure-only" update;

3. On the DNS server, enable the related reverse lookup zone exits.

Best Regards,

Anne

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_{Thursday, November 10, 2016 4:38 PM}

Everything is correct on all servers, however still one of the DC (all DCs holds DNS and DHCP roles also) still not updating PTR records and not getting any response for nslookup with IP address.

Tek-Nerd

_{Friday, November 11, 2016 9:17 AM}

Hi Tek-Nerd,

Is the reversed lookup zone correct?

We may use network monitor to capture the packet for further troubleshooting:

https://www.microsoft.com/en-us/download/details.aspx?id=4865

Best Regards,

Anne

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_{Thursday, November 17, 2016 2:50 PM}

Hi, 

Anne,

Reverse lookup zones are defined correctly. ( running for the last several years on Windows 2008 R2 DNS servers).

As of now we have 2 Windows 2008 R2 DCs and 3 Windows 2012 R2 DCs ( With AD integrated DNS).

Windows 2012 R2 Dcs also running DHCP role.

One of the Windows 2012 R2 DNS server and both Windows 2008 R2 DNS servers showing with checkbox checked , where as two Windows 2012 R2 DNS servers are not check marked update PTR record .

Tek-Nerd

_{Monday, November 21, 2016 2:59 AM}

Everything is correct on all servers, however still one of the DC (all DCs holds DNS and DHCP roles also) still not updating PTR records and not getting any response for nslookup with IP address.

Tek-Nerd

Hi Tek-Nerd,

Could you provide the detailed information of this DC.

As you say, all DCs holds DNS and DHCP roles, then what is the DHCP scopes on this DC? Does clients in this scope do not update PTR records.

Could you provide the DNS setting on this DHCP server, like my above screenshot.

Besides, could you provide an IP setting on the test clients, and show us the records and the DC, also show us an nslookup result.

Best Regards,

Anne

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_{Monday, November 21, 2016 2:57 PM}

Same DHCP scopes defined on two servers with different pool ranges on each server for the same scope.

Most of the clients getting DHCP address on the pointed server PTR records are good, but not all.

Member servers with fixed IP addresses (specified DNS server as primary DNS) also not updating PTR records.

DNS settings on DHCP server ( Same on all DHCP servers)

Member server IP settings:

Tek-Nerd

_{Friday, November 25, 2016 7:30 AM}

Hi Tek-Nerd,

Then, have you checked network monitor capture result?

Could you get any clue from the traffic capture?

Best Regards,

Anne

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