AD Integrated DNS, Capitalization of FQDN problem

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

kkoechel - 25 Jun 2008 14:58 GMT

Hello, new to the group,

I am having a strange problem with a DNS server capitalizing a few
entries in our AD integrated DNS server.

When I type in a particular set of hosts and aliases for these hosts,
after:

1) a restart of DNS
2) a refresh of the mmc console
and
3) a reload of the DNS

the FQDN of the machine is all in caps. I have tried everything
apparent to me, including:

- deleting the entries, clearing the cache, reloading DNS, updating
server files, making sure WINS is turned off, and every combination of
the above.

This is an issue because we have Solaris boxes using this DNS and when
it returns the names/aliases as all caps we have apps that cannot
handle that.

Google was not helpful, and I have not see this issue before. Anyone
seen anything like this?

Thanks,
Kelly

Reply to this Message

Herb Martin - 26 Jun 2008 11:53 GMT

> Hello, new to the group,
>
> I am having a strange problem with a DNS server capitalizing a few
> entries in our AD integrated DNS server.

DNS resolution is not case sensitive so it is only a cosmetic issue.

> When I type in a particular set of hosts and aliases for these hosts,
> after:
[quoted text clipped - 6 lines]
> the FQDN of the machine is all in caps. I have tried everything
> apparent to me, including:

What machine?

Where and how are you seeing this? Use NSLookup and specify both
the lookup name AND the DNS server to use (post request command
and the answer along with an IPConfig /all.)

> - deleting the entries, clearing the cache, reloading DNS, updating
> server files, making sure WINS is turned off, and every combination of
[quoted text clipped - 3 lines]
> it returns the names/aliases as all caps we have apps that cannot
> handle that.

Odd since DNS is not supposed to be cases sensitive no app should care.

Those apps are broken -- while it is normal for Unix-like machines to
use case sensitive FILE names -- case sensitive DNS is not according
to the RFCs

> Google was not helpful, and I have not see this issue before. Anyone
> seen anything like this?

Are you perhaps using a CAPITALIZED Primary (or connection specific)
DNS Suffix and then not specifying a suffix on the lookup?

(Client would then supply the capitalized suffix which the DNS Server
will happily resolve since DNS is not case sensitive.)

Reply to this Message

Ace Fekay [MVP] - 13 Jul 2008 00:40 GMT

> Hello, new to the group,
>
[quoted text clipped - 25 lines]
> Thanks,
> Kelly

Is the machine's computer name in upper case?

Although DNS is not case sensitive, the registering client's computer name's
case is preserved when it's registered into DNS. If the application is
sensitive to case, you may need to rename the machine with the proper case.
Another possibility is to disable registration on the specific machines that
have names in upper case, unless of course it's a domain controller, which
vastly complicates things more ways than one.

Signature

Regards,
Ace

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

For urgent issues, you may want to contact Microsoft PSS directly. Please
check http://support.microsoft.com for regional support phone numbers.

Infinite Diversities in Infinite Combinations

Reply to this Message