Urgent - Unable to connect to AD

  • Thread starter Thread starter Simon Gronow
  • Start date Start date
S

Simon Gronow

Hi Gals & Guys,


I have got a site that is a Single Server running Active Directory and we
have this server acting as a
Domain controller.




We can login to the File Server ok, but if we try and open any of the Active
Directory tools we get
an error of "Naming information cannot be located because: no authority
could be contacted for
authentication. Contact your system administrator. "


Plus none of the workstations can logon.




I have checked the DNS, it's working ok, I have restarted the F/s





Help! and Thanks

Rgds
Simon.
 
Simon Gronow said:
Hi Gals & Guys,


I have got a site that is a Single Server running Active Directory and we
have this server acting as a
Domain controller.




We can login to the File Server ok, but if we try and open any of the Active
Directory tools we get
an error of "Naming information cannot be located because: no authority
could be contacted for
authentication. Contact your system administrator. "


Plus none of the workstations can logon.




I have checked the DNS, it's working ok, I have restarted the F/s





Help! and Thanks

Rgds
Simon.
Click to expand...

I suggest you google for the string "Naming information cannot be located ".
I found almost 600 hits, and the first few look spot on!
 
Can u tell me the event if in event viewer?..do u have single domain
controller ?

Is this DC also acting for any other file/application service?

Where is DNS installed?

-
Muhammad Tariq Ahmed Khan
Systems & Security Administrator
MCSE,MCSA,MCSE Security,CCNA,CISSP
Arab National Bank,
Riyadh,Saudi Arabia
Phone: 00966 1 4029000 Ext 8296
Mobile: 00966 5 08880684
 
DC is acting for file/app service - yes

DNs - YEs installed (local lan card pointing to dns on server)


Rgds
Simon.
 
DO u have any other DC in your environment or this is the only one?

Do u have abckup of yuour server
--
Muhammad Tariq Ahmed Khan
Systems & Security Administrator
MCSE,MCSA,MCSE Security,CCNA,CISSP
Arab National Bank,
Riyadh,Saudi Arabia
Phone: 00966 1 4029000 Ext 8296
Mobile: 00966 5 08880684
 
1 Server and thats it.


As for a backup I hope so. (it's not my server, but a customers)


Rgds
Simon
 
If you have the backup you can perform Primary backup in active directory
restore mode...


Muhammad Tariq Ahmed Khan
Systems & Security Administrator
MCSE,MCSA,MCSE Security,CCNA,CISSP
Arab National Bank,
Riyadh,Saudi Arabia
Phone: 00966 1 4029000 Ext 8296
Mobile: 00966 5 08880684
 
Hello,

Naming convention cannot be found tends to have me think DNS or another
domain controller in the environment.
Verify that your Domain Controller is pointed to itself and only itself
for DNS. Have it forward out to your ISP for internet resolution.
Reregister your DC by running the following in the command prompt
ipconfig /flushdns & ipconfig /registerdns & net stop netlogon & net
start netlogon.
Verify that your client machines are pointed to your DC for primary DNS
and NOTHING else

"none of the workstations can logon"
The client machines receive information for DC's in their domain from
DNS, so that would be the first thing I would look at.
It would be ironic if the secure channel has broken for all of your
workstations.


Harj
Power Your Active Directory Investment
www.specopssoft.com
 
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