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DDNS Issue When Using TCP/IP Alternate Configuration

Posted on 2010-08-23
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Last Modified: 2012-05-10
Hi,

I've noticed some unexpected behaviour in regard to dynamic DNS updates when using Alternate Configuration TCP/IP settings, but can find no reference to what I see in any doucmentation or on the web.  Can some please help explain what I am seeing...

Basically machines using Alternate Configuration settings do not register with DNS.

The machines (both XP and Windows 7) register fine if using DHCP or static details, but refuse to register if using Alternate Configuration (User Defined not APIPA).  All addresses are the same in each instance (ie. IP, subnet, DG, DNS).

We have users that work at secndary sites sometimes that do not have DHCP.  To get around this we set Alternate Config's on them.  then they do not register...Pain.

DHCP and DNS running on Server 2003 AD DC's.

Any pointers very welcome.

Regards

Mark
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Question by:TechnologyTeam
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8 Comments
 
LVL 8

Expert Comment

by:tonyperth
ID: 33501161
Is the advanced setting sis "Register this connection's addresses in DNS" definetely ticked.
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Author Comment

by:TechnologyTeam
ID: 33501250
Yes, it definitely is.

I had a colleague at a non DHCP site check these settings today.  He was running an Alternate Config.

I could not resolve his hostname (nslookup to his primary DNS server).  Tried ipconfig /registerdns.  No change.  Chnaged to have addresses set as static on the general tab and registered straight away.
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LVL 8

Expert Comment

by:tonyperth
ID: 33501509
where do you expect them to register, on your site or off site?
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Author Comment

by:TechnologyTeam
ID: 33501563
Same DNS server for both sites.  Just different locations on our routed network.
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LVL 8

Expert Comment

by:tonyperth
ID: 33502667
This is a good article:

http://support.microsoft.com/kb/816592

One thing to consider is that your DNS server may be set to only accept Secure dynamic updates in Active Directory-integrated zones, and your remote site may not be secure enough for DNS to be happy with an update.
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Author Comment

by:TechnologyTeam
ID: 33505693
Thanks for the link Tony.

DNS set to accept secure and non-secure updates.

Tried yet another machine.  DHCP assigned addresses get registered in DNS while the exact same details on the same machine, but assigned from an Alternative Config do not.

Tried different OS's (xp, w7, 2008 r2, 2003) with same results.

Maybe the Alt Config is thought of as not being used in a DDNS envirnment.  All MS docs seem to refer to it as a home or broadband feature... but it is included with server OS's...



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LVL 8

Accepted Solution

by:
tonyperth earned 500 total points
ID: 33510535
I have a feeling that the Alternate configuration does not register with DNS, as you said it is for small enviroments, which in the past would use wins or network discovery to find other machines, so there would be no need to register with DNS.  Sorry.
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Author Closing Comment

by:TechnologyTeam
ID: 33520482
Conclusion reached but no hard evidence to support it.
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