RE: Multiple pointer entry`s for pc`s
- From: v-kzhao@xxxxxxxxxxxxxxxxxxxx (Ken Zhao [MSFT])
- Date: Thu, 27 Oct 2005 06:11:48 GMT
Hello,
Thank you for using newsgroup!
Based on my knowledge, Pointer (PTR) RRs are used to support the reverse
lookup process, based on zones created and rooted in the in-addr.arpa
domain. These records are used to locate a computer by its IP address and
resolve this information to the DNS domain name for that computer.
As far as I know, PTR RRs can be added to a zone in several ways:
1. You can manually create a PTR RR for a static TCP/IP client computer
using the DNS, either as a separate procedure or as part of the procedure
for creating an A RR. For related information, please refer to this article:
Add a pointer (PTR) resource record to a reverse zone
<http://www.microsoft.com/technet/prodtechnol/windowsserver2003/library/Serv
erHelp/16f563ee-5658-42f9-877e-7fae65026af1.mspx>
2. Computers use the DHCP Client service to dynamically register and update
their PTR RR in DNS when an IP configuration change occurs.
3. All other DHCP-enabled client computers can have their PTR RRs
registered and updated by the DHCP server if they obtain their IP lease
from a qualified server. The Windows 2000 and Windows Server 2003 DHCP
Server service provides this capability.
The pointer (PTR) resource record is used only in reverse lookup zones to
support reverse lookup. For more information, you may refer to see Resource
records reference from the following link:
<http://www.microsoft.com/technet/prodtechnol/windowsserver2003/library/Serv
erHelp/7b005a9b-4397-4d94-a584-34c037e2457c.mspx>
To delete pointer record, you may use the following command in command line:
dnscmd /recorddelete 10.168.192.in-appr.arpa 112 PRT /y
deletes pointer record --> 10.192.168.112
Delete a resource record from a zone
<http://www.microsoft.com/technet/prodtechnol/windowsserver2003/library/Serv
erHelp/9b561e1b-9a0d-43e5-89a8-9daf07afac0d.mspx>
More reference:
====================
Using DNS servers with DHCP
<http://www.microsoft.com/windows2000/en/server/help/default.asp?url=/window
s2000/en/server/help/sag_DHCP_imp_InteroperabilityDNS.htm>
246804: How to enable or disable DNS updates in Windows 2000 and in Windows
Server 2003
http://support.microsoft.com/kb/246804/en-us
816592: How to configure DNS dynamic updates in Windows Server 2003
http://support.microsoft.com/default.aspx?scid=kb;en-us;816592
Thanks & Regards,
Ken Zhao
Microsoft Online Partner Support
Get Secure! - www.microsoft.com/security
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| Thread-Topic: Multiple pointer entry`s for pc`s
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| From: "=?Utf-8?B?UmV4IEtyZW1lcg==?=" <rex@xxxxxxxxxxxxxx>
| Subject: Multiple pointer entry`s for pc`s
| Date: Wed, 26 Oct 2005 06:03:03 -0700
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|
| Hi,
|
| i noticed the the reverse entrys for the client pc`s are double or more
in
| the dns.
| The primary dns server is in the root domain. (e.g. domain.org)
| The secondary zone is in a child domain where all client pc`s (and users
| accounts) are.(test.domain.org).
| Dhcp is configured in the root domain and in the child domain.
|
| Dhcp Options
| Automaticly update client information in dns
| DHcp update only if dhcp client request
|
| The clients are windows 2000 and windows xp.
| Why are the pointers double in dns and how can we avoid this?
|
| regards
|
|
|
|
.
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