DNS Server Problem with a lookup

Hallo all,

have a strange problem with DNS Server on a SBS 2003 Server.
Problem seems to have ben happening about 3/4 weeks, perhaps longer, I may
not have noticed.

Basically, the resolving of "db.com" fails. Result is that IP is not passed
to clients needing it for a banking connection. (Deutsche Bank).

A restart of DNS Server service and cache flush of clients usually sort it
out - but I can find no reason why the original lookup fails.
DNS Server is set with no forwarder, all runs over root hint servers - as
far as I can tell.
Have even set new ip for l.root-servers.net

Since users are not calling regarding other DNS fails and all clients use
the SBS box as only DNS server I think db.com is the only (known) issue.

Could anyone please help me resolve this?

On Wed, 5 May 2010 05:44:01 -0700, Ken-T
<> wrote:

>Hallo all,
>
>have a strange problem with DNS Server on a SBS 2003 Server.
>Problem seems to have ben happening about 3/4 weeks, perhaps longer, I may
>not have noticed.
>
>Basically, the resolving of "db.com" fails. Result is that IP is not passed
>to clients needing it for a banking connection. (Deutsche Bank).
>
>A restart of DNS Server service and cache flush of clients usually sort it
>out - but I can find no reason why the original lookup fails.
>DNS Server is set with no forwarder, all runs over root hint servers - as
>far as I can tell.
>Have even set new ip for l.root-servers.net
>
>Since users are not calling regarding other DNS fails and all clients use
>the SBS box as only DNS server I think db.com is the only (known) issue.
>
>Could anyone please help me resolve this?


KenT,

With all due respect, you've posted this twic in the SBS newsgroup,
and got multiple, valuable responses for possible resolutions,
including one from myself. I did not see you reply to any of the
responses.

For your convenience, most of the responses regarded checking to
insure all machines ONLY use the SBS server as their DNS address (and
not the router's IP or an ISP's DNS server, make sure your firewall
supports EDNS0 and is enabled, and simply use Forwarders.

I hope you are able to see the responses in the SBS newsgroup, as well
as this one in the DNS group.

Have you posted this anywhere else?

Thank you,

Ace

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

Please reply back to the newsgroup or forum for collaboration benefit among responding engineers, and to help others benefit from your resolution.

Ace Fekay, MVP, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer
Microsoft MVP - Directory Services

If you feel this is an urgent issue and require immediate assistance, please contact Microsoft PSS directly. Please check http://support.microsoft.com for regional support phone numbers.

Hi,

I have posted responses to all the answers. Actually copied the answer given
in social Technet. I always try to respond to any help as a matter of course
- and - to provide more info to aid others looking for answers.
Have had major problems here in the groups. At times it shows, at other
times errors. My responses were properly sent and confirtmed, even hit the
"Inform me of responses". My resaponses have not posted, nor have I received
notifications.
I see test postings from others too - and after trying to find what may be
wrong saw news that MS will actually be closing this soon - and that all will
then be done via the forums.

Apologies.

"Ace Fekay [MVP - Directory Services, MCT" wrote:

> On Wed, 5 May 2010 05:44:01 -0700, Ken-T
> <> wrote:
>
> >Hallo all,
> >
> >have a strange problem with DNS Server on a SBS 2003 Server.
> >Problem seems to have ben happening about 3/4 weeks, perhaps longer, I may
> >not have noticed.
> >
> >Basically, the resolving of "db.com" fails. Result is that IP is not passed
> >to clients needing it for a banking connection. (Deutsche Bank).
> >
> >A restart of DNS Server service and cache flush of clients usually sort it
> >out - but I can find no reason why the original lookup fails.
> >DNS Server is set with no forwarder, all runs over root hint servers - as
> >far as I can tell.
> >Have even set new ip for l.root-servers.net
> >
> >Since users are not calling regarding other DNS fails and all clients use
> >the SBS box as only DNS server I think db.com is the only (known) issue.
> >
> >Could anyone please help me resolve this?
>
>
> KenT,
>
> With all due respect, you've posted this twic in the SBS newsgroup,
> and got multiple, valuable responses for possible resolutions,
> including one from myself. I did not see you reply to any of the
> responses.
>
> For your convenience, most of the responses regarded checking to
> insure all machines ONLY use the SBS server as their DNS address (and
> not the router's IP or an ISP's DNS server, make sure your firewall
> supports EDNS0 and is enabled, and simply use Forwarders.
>
> I hope you are able to see the responses in the SBS newsgroup, as well
> as this one in the DNS group.
>
> Have you posted this anywhere else?
>
> Thank you,
>
> Ace
>
> This posting is provided "AS-IS" with no warranties or guarantees and confers no rights.
>
> Please reply back to the newsgroup or forum for collaboration benefit among responding engineers, and to help others benefit from your resolution.
>
> Ace Fekay, MVP, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003
> Microsoft Certified Trainer
> Microsoft MVP - Directory Services
>
> If you feel this is an urgent issue and require immediate assistance, please contact Microsoft PSS directly. Please check http://support.microsoft.com for regional support phone numbers.
> .
>

On Thu, 6 May 2010 23:24:01 -0700, Ken-T
<> wrote:

>Hi,
>
>I have posted responses to all the answers. Actually copied the answer given
>in social Technet. I always try to respond to any help as a matter of course
>- and - to provide more info to aid others looking for answers.
>Have had major problems here in the groups. At times it shows, at other
>times errors. My responses were properly sent and confirtmed, even hit the
>"Inform me of responses". My resaponses have not posted, nor have I received
>notifications.
>I see test postings from others too - and after trying to find what may be
>wrong saw news that MS will actually be closing this soon - and that all will
>then be done via the forums.
>
>Apologies.
>

No need to apologize, Ken. All is good. I hope our assistance in the
Technet Forum is helpful.

Ace