Change DNS client settings

Hi,
I have the following problem.
We are using ZENworks 3.2 and we have some clients which have the internal
DNS server manually configured in the TCPIP settings. I want to change
that to "automatically", so the client gets the DNS Servers from the DHCP
server. Hava anybody experience how can I do that with ZENworks?
Many thanks
Josef

There are some freeware tools that can do this.
Sorry I can't recall the name.
I think they may even be provided by MS.
ZEN could be used to simply call the tools if found.
[email protected] wrote:
> Hi,
> I have the following problem.
> We are using ZENworks 3.2 and we have some clients which have the internal
> DNS server manually configured in the TCPIP settings. I want to change
> that to "automatically", so the client gets the DNS Servers from the DHCP
> server. Hava anybody experience how can I do that with ZENworks?
>
> Many thanks
> Josef
Craig Wilson
Novell Product Support Forum Sysop
Master CNE, MCSE 2003, CCN

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[Copying verbatim from a mail by Joe ]
So I have been pinged by a few folks recently on configuration of client DNS settings on Domain Controllers that are also functioning as DNS Servers. Lots of debate. I understand there has been long time debate within MSFT as well.
From http://blogs.technet.com/b/askds/archive/2010/07/17/friday-mail-sack-saturday-edition.aspx there
is the quote
"3.When referencing a DNS server on itself, a DNS client should always use a loopback address and not a real IP address."
From http://www.microsoft.com/en-us/download/confirmation.aspx?id=9166 (Windows
Server 2008 R2 Core Network Guide)
"9. In Preferred DNS server, type the IP address of your DNS server. If you plan to use the local computer as the preferred DNS server, type the IP address of the
local computer.
10. In Alternate DNS Server, type the IP address of your alternate DNS server, if any. If you plan to use the local computer as an alternate DNS server, type the IP address of
the local computer."
From http://technet.microsoft.com/en-us/library/dd378900(v=ws.10).aspx (DNS:
DNS servers on <adapter name> should include their own IP addresses on their interface lists of DNS servers)
"The inclusion of its own IP address in the list of DNS servers improves performance and increases availability of DNS servers. However, if the DNS server is also a domain controller and it points only to
itself for name resolution, it can become an island and fail to replicate with other domain controllers. For this reason, use caution when configuring the loopback address on an adapter if the server is also a domain controller. The loopback address should
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Add the loopback IP address to the list of DNS servers on all active interfaces. The loopback IP address should not be the first server in the list."
ESPECIALLY "For this reason, use caution when configuring the loopback address on an adapter if the server is also a domain controller. The loopback address should be configured only as a secondary or tertiary
DNS server on a domain controller." and "Add the loopback IP address to the list of DNS servers on all active interfaces. The loopback IP address should not be the first server in the list."
Why shouldn't loopback not be first, the justification is why you shouldn't only use loopback, not why it shouldn't be first.
From http://technet.microsoft.com/en-us/library/ff807362(v=ws.10).aspx (DNS:
DNS servers on <adapter name> should include the loopback address, but not as the first entry)
"If the loopback IP address is the first entry in the list of DNS servers, Active Directory might be unable to find its replication partners.
The inclusion of its own IP address in the list of DNS servers improves performance and increases availability of DNS servers. However, if the DNS server is also a domain controller and it points only to itself,
or points to itself first for name resolution, this can cause a delay during startup. For this reason, use caution when configuring the loopback address on an adapter if the server is also a domain controller. The loopback address should be configured only
as a secondary or tertiary DNS server on a domain controller."
This also seems like justification against only using loopback versus using it first.
Are there any actual real documented issues for using loopback first and a remote DNS server second and perhaps third? If the local DNS server service isn't working yet (or at all), I would expect the DNS Client process
to try to connect to it, fail, and then failover to the secondary just like I would expect it to failover if the remote DNS server was secondary and it was unavailable and it failed back to the loopback. Am I making a bad assumption?
And by documented I don't mean random responses to questions on the internet or other such items. I mean a KB article or technet article or properly researched and tested other web article from a reliable resource.
thanks,
joe

As I understand it, the scenario whereby a DC could become an 'island' if it points only to itself, or to itself first, was repaired in the Windows Server 2003 product cycle. See
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Hi-
I work in a school, and manage @ 1,100 student iBooks. I'm trying to figure out how to create a package that performs the same functions as the "Change Client Settings" feature under the "Manage" Menu. We use external HD's to reimage the computers, and add packages to this HD that are installed post flight. Right now I have to do the reimaging, then use the "Change Client Settings Feature" seperately, then finally run a package that pushes out the VNC password, (com.apple.VNCSettings.txt) that is in the /Library/Preferences folder.
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I have been getting these DNS client events And my internet connection has been limited and disconnected over and over again. My desktop (this event) is connected to my notebook computer that is connected to a wireless connection (Apt Managed)

Hi,
This issue can occur by incorrect DNS settings. I suggest you perform the following steps to troubleshoot the issue.
1. Click "Start", input "NCPA.CPL" (without quotation marks) and press Enter.
2. Right click on the connection that you use for the local connection, and then click "Properties".
3. Click to select "Internet Protocol Version 4 (TCP/IPv4)", and then click "Properties".
4. In the Internet Protocol window, let's change the "Preferred DNS server" to 208.67.222.222
5. Click 'OK' twice to complete the modification.
If the issue persists, please repeat the steps and change the "Preferred DNS server" to 208.67.220.220.
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Can't override DNS Server settings - can only append!

See this thread for a similar question:
http://discussions.apple.com/thread.jspa?messageID=3555096
I have also filed this with Apple (Problem ID 5159216). Here is the text of the report (with a few bits removed - not crucial to understanding the report).
If anyone has suggestions/clues to resolve, please advise. Thanks!
Summary:
This problem concerns AirPort Extreme (802.11n) at revision 7.1. I will summarize with a comparison between AirPort and MacOS X.
MacOS X and Airport Extreme (referred herein as "AE") both permit editing of DNS server settings whether in DHCP or Manual mode.
When MacOS X DNS server settings are set manually by the end-user, the new server IPs are used (good). When AE's DNS server settings are overridden by the end-user, the new server IPs are NOT used (not good)! Rather, the DHCP-supplied DNS server always pre-empts whatever is given in the AE Configuration UI.
Steps to Reproduce:
1. Using AirPort Extreme (802.11n) at revision 7.1 and MacOS 10.4.9 on a MacBook Pro (Core 2 Duo). The AE has been previously configured for IPv4 using DHCP and the MacBook is successfully connected and resolving domain names through the AE.
2. Visit "Apple Menu > Location > Network Settings" and check the AirPort TCP/IP settings. For purposes of this test, make sure the "DNS Servers" field is EMPTY so MacOS X defaults to the AE's DNS settings, then close System Preferences.
3. Run "AirPort Utility" (the newer version, not "Airport Admin Utility") and configure the AE under test. Pick the "Internet" icon in the toolbar and note the Internet Connection settings.
4. In this test, Configure IPv4 is set to "DHCP" and the DNS Server(s) field contains two DNS IPs assigned by the Internet Service Provider. In my case that's Cablevision's Optimum Online service. You may or may not see IP addresses here, but in my case they are visible.
5. As the DNS Server(s) are editable, and they both show ISP-supplied addresses, they can be changed to whatever alternate IPs you wish. For instance, change them to these alternate DNS IPs from OpenDNS.com: 208.67.222.222 and 208.67.220.220. (You could use any alternate set of IPs but for the purpose of this test use the OpenDNS IPs.) Update the AE and restart.
(For additional reference, http://www.opendns.com/start/airport.php shows instructions for the older AirPort Admin Utility, but the concept is exactly the same.)
6. Normally you shouldn't have to restart the MacBook Pro since we're just using the AE settings, but go ahead and do that just to be consistent with this test.
Expected Results:
Now for the moment of truth! We want to verify that we're using the OpenDNS IPs for our DNS Servers. One nice feature OpenDNS has is automagic redirection for certain domain name typos.
Here's an example. Drop to shell (Applications > Utilities > Terminal) and try this command (excluding the $ prompt, natch):
$ dig craigslist.og
The "og" typo is deliberate. We really want to go to craigslist.org. If you're using the new OpenDNS IPs, you will STILL get an Address (A) record with an IP like so:
;; ANSWER SECTION:
craigslist.og. 0 IN A 208.69.32.130
If you had entered "craigslist.og" in Safari, you would end up at 208.69.32.130 (an OpenDNS server) and then redirected to craigslist.org.
Actual Results:
Alas, that's not what happens! Instead, you get NO IP address, like so:
;; QUESTION SECTION:
;craigslist.og. IN A
This means we're not actually using the OpenDNS IPs. What's happening?
To find out, I spoke with the AirPort support group (Case # xxx-xxx-xx). I learned that, despite being allowed to edit and override the IP addresses provided via DHCP, the AE still uses the DHCP-provided DNS server if available.
Again, the user interface suggests that I'm allowed to override the DHCP-provided DNS IPs as shown in the UI. Even though I can do this, the AirPort will still keep note of any DHCP-provided DNS Server IPs and use those first.
True, I can switch to Manual network settings (and then my own DNS Server IPs take effect). Of course this is problematic when the ISP renews my IP address (which it does from time to time).
Another workaround is to use the "DNS Servers" settings noted in step 2 (above). However this is also problematic if I want to keep my network settings simple. It requires a "Home Network" location and an "Office" location. Still not preferable, but it's a workaround.
Regression:
n/a
Notes:
I would like AirPort's DNS settings to be overridden in the same way OS X allows DNS settings to be overridden. The user interfaces suggest this is possible but it is not. It's only possible in the OS X case. Having the same flexibility on the AirPort would be most welcome.

Afraid of the answer...sheesh...you must be a child. This has nothing to do with masquerading anything. The issue being discussed here is that people want to manually assign a dns server address via the new AEBS, while maintaining DHCP for IP address assignments through their ISP. For example, I would like to have opendns.com take care of all dns addressing at the router level, even though I have "Configure IPv4" set to "Using DHCP". If you do not understand why one would want to use something like opendns.com, please visit their website and enlighten yourself. The fact that the dns server address fields are editable when set to "Using DHCP" leads one to believe that you can manually assign a dns server in this configuration; however, under firmware 7.1.1, you still cannot. The previous iteration of the airport hardware can do it, as can nearly any router you pull off the shelf. In addition, this is something that can easily be done at the individual-computer level in OS X; however, many people would prefer to administer their network at the router level. That is the issue being discussed here. Either you can't read or you are purposely derailing the thread.
iMac 24" Mac OS X (10.4.9)

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Hi,
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http://prajwaldesai.com/default-client-settings-sccm-2012-sp1-sccm-2012-sp1/
Note: Microsoft provides third-party contact information to help you find technical
support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
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Joyce

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