Re: Computers Registering Two IPs

In news:ic-dnRdXaYTfwt3YnZ2dnUVZ_q2dnZ2d@xxxxxxxxxxxx,
Will <westes-usc@xxxxxxxxxxxxxx> stated, which I commented on below:
All of our Windows 2003 computers that are doing dynamic updates of
DNS to the domain controller's DNS server are updating their domain
name to resolve to TWO different IPs. One of these is the IP that
is configured for the host by DHCP. But the second IP is one that
is always the same across all hosts. It is the address 192.38.0.1.
Aside from the strangeness of this being the same address for
different computers, what is really strange is that this IP has no
bearing whatsoever to the configuration of our network. I do not find
this IP in the registry of the affected machines, and I do not find
this IP on the file system. Can someone explain to me what might
be causing this? It appears to affect only Windows 2003.

The dynamic updates to our domain controller's DNS server appear to be
accepted with both IPs, but only the correct IP ever gets registered
to our DNS. The 192.38.0.1 address mysteriously vanishes and is
never stored by DNS server, even if I create an Active Directory
integrated reverse zone to hold it (i.e., 192.38.0.x). It seems
that this IP 192.38.0.1 is reserved by Microsoft for some special
use, but I'm baffled so far, and I find no references to it online.

I'm assuming that the domain controllers are single homed (one NIC in use on
one subnet)? But I can't understand why you would have a domain controller
configured for DHCP, unless I mis-read your post and don't know what you
mean by "it is configured for the host by DHCP"?

I looked up 192.38.0.1 using nslookup, however it returns nothing. Arin.net
says it belongs to RIPE, which is based in Amsterdam. So this does not make
sense as to why the DCs are registering this IP. Normally the interface's IP
will get registered into the DNS server that is configured in IP property's
zone, unless there's a mixture with ISP and local DNS servers.

ANy errors in the Event logs?

Can we take a look at an ipconfig /all from the DC that is regsitering this
IP please?

Thanks,

--
Ace
Innovative IT Concepts, Inc (IITCI)
Willow Grove, PA

This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP
Microsoft MVP - Directory Services
Microsoft Certified Trainer

Having difficulty reading or finding responses to your post?
Instead of the website you're using, I suggest to use OEx (Outlook Express
or any other newsreader), and configure a news account, pointing to
news.microsoft.com. This is a direct link to the Microsoft Public
Newsgroups. It is FREE and requires NO ISP's Usenet account. OEx allows you
to easily find, track threads, cross-post, sort by date, poster's name,
watched threads or subject.
It's easy:

How to Configure OEx for Internet News
http://support.microsoft.com/?id=171164

Infinite Diversities in Infinite Combinations
Assimilation Imminent. Resistance is Futile
"Very funny Scotty. Now, beam down my clothes."

The only constant in life is change...


.

Relevant Pages

  • RE: I cannot web browse or reach microsoft updates on my SBS2003
    ... If you use DHCP service to assign the DNS server address, ... single network adapter configuration): ... Check "Hide all Microsoft Services", click Disable All and clear "Hide ... This newsgroup only focuses on SBS technical issues. ...
    (microsoft.public.windows.server.sbs)
  • RE: I cannot web browse or reach microsoft updates on my SBS2003
    ... If you use DHCP service to assign the DNS server address, ... single network adapter configuration): ... Check "Hide all Microsoft Services", click Disable All and clear "Hide ... This newsgroup only focuses on SBS technical issues. ...
    (microsoft.public.windows.server.sbs)
  • RE: DNS forwarders
    ... Microsoft CSS Online Newsgroup Support ... >configured with forwarders, which are servers at my ISP. ... >are configured with the main DNS server at Site A as the primary, ... >listed, including my current configuration. ...
    (microsoft.public.windows.server.dns)
  • Re: Group policy Error; Event ID 1030 & 1058
    ... Starting test: CrossRefValidation ... Running partition tests on: Configuration ... "Meinolf Weber" wrote: ... On my DC NIC 213.42.20.20 is the alternate DNS server. ...
    (microsoft.public.windows.group_policy)
  • Re: Which DC for authentication?
    ... > I have check the configuration of the DNS server: ... When you are implementing sites you usually first configure the site, ... when rebooting or when restarting the netlogon service. ...
    (microsoft.public.windows.server.active_directory)