DNS incorrectly resolving internal addresses as external.

[Chris Clkarke-Williams]

Replace anonymous with ChrisC_W if repling be e-mail.


Several of our servers are no longer being found by DNS.
A symptom is that is we 'Ping' them we get a response from
an external IP address. For example Pinging LUCY gets a
response from lucy.co.uk and an external IP address.

I'm also getting the following error on starting our PDC
which appears to be indicating that the DNS server located
there gcan't find its own host machine. The error report
is:

Registration of the DNS record '_ldap._tcp.Default-First-
Site-Name._sites.dc._msdcs.master.wwl.co.uk. 600 IN SRV 0
100 389 chriscw.master.wwl.co.uk.' failed with the
following error:
DNS server unable to interpret format.

Can anyone help us or suggest where we can get support
from? Do Microsoft provided support for this kind of
problem and if so at what cost?

 

[Kevin D. Goodknecht [MVP]]

In Chris Clkarke-Williams <[email protected]> posted a question
Then Kevin replied below:
: Replace anonymous with ChrisC_W if repling be e-mail.
:
:
: Several of our servers are no longer being found by DNS.
: A symptom is that is we 'Ping' them we get a response from
: an external IP address. For example Pinging LUCY gets a
: response from lucy.co.uk and an external IP address.
:
: I'm also getting the following error on starting our PDC
: which appears to be indicating that the DNS server located
: there gcan't find its own host machine. The error report
: is:
:
: Registration of the DNS record '_ldap._tcp.Default-First-
: Site-Name._sites.dc._msdcs.master.wwl.co.uk. 600 IN SRV 0
: 100 389 chriscw.master.wwl.co.uk.' failed with the
: following error:
: DNS server unable to interpret format.
:
: Can anyone help us or suggest where we can get support
: from? Do Microsoft provided support for this kind of
: problem and if so at what cost?

This is the kind of error you see when you have your ISP's DNS in the DC's
NIC. You should *NOT* use your ISP's DNS in any NIC on any member of an
Active directory domain. In most cases DNS is installed on your DC, All
machines including and especially the DC should *ONLY* use the local DNS
server's Address for DNS.

If you are using your DC for DNS you could have a disjointed namespace, in
that case post back with the ipconfig /all from the DC *AND* the name of
your AD Domain from ADU&C.
Also you should only use your local AD DNS name *ONLY* in the domain search
list on the DNS tab.
Do *NOT* use any external name in the domain search list, this just adds
work to your DNS server.