Window server 2008 STD sp2 won't suddenlly allow any login's

Is the server also a DC?
Can you post DCDIAG if it is please?

It is  DC I will be able to get to the server again on monday dor that but i dont think dcdiag will run in safe mode

Also, please list the exact error you get when you try to login via normal boot.

Check your DNS settings and make sure that DNS in TCP/IP is pointing to the local IP address of the DC (Assuming that you DC is a DNS server).  Or just point your DNS to 127.0.0.1 and reboot the server and try login again.

Make sure you are only pointing to internal DNS servers only you shouldn't have any external DNS servers listed.

Also not if the server is the DNS server as well it should use the FULL IP address and not the LOOPBACK (127.0.0.1) address.

If you make changes to this then please restart the NETLOGON service BEFORE running DCDIAG.

Then please post DCDIAG results.

the exact error when i try to log in is user name or password is incorrect , this applys to the domain login and or the local login accounts.

the dns server is pointing to its actuall ip address which is 10.0.0.1 there is also running rass server for nas  . So I do have 2 ip addresses but the other one is the external internet fixed IP address.
would it be worth trying to remove and re install the dns server ? . I will try the loopback address also on monday.
It takes real long time applying computer settings also before the ctrl-alt-del screen appers booting in normal mode


the thing is no changes have been made to the server this just happened overnight.

<i will be next able to access the server on location on monday. are you sure dcdiag will run ok in safe mode ? . I can also boot to direcory repair mode which allows for services to be run .

If you have 2 NIC's you need to ensure that under the properties of the NOC that is not connected to the internal network has the "register this connection in DNS" unchecked

can you post DCDIAG results?

cool I didnt know that I had to not register the nic for internet in the tcpip propertys ill try that then ill try do a dcdiag and post it on monday I can boot in safe mode with networking to change those adaptor propertys , should i remove some entrys in the dns then for the external ip address ?
can I do this without the dns server running in safemode ?

thanks

You shouldnt need to remove any entries it shouod sort that out itself when you boot.

If not run DCDIAG /FIX

Also, run ipconfig /flushdns and ipconfig /registerdns before dcdiag /fix

None fo the suggestions so far have helped, also it seems you cannot run dcdiag in any safe mode including directory resotre mode,

i just get the reply that the server is not a dc ,

I have checked all the dns settings in safemode with networking and all seems to be ok the funny thing is the server seems to be functioning but will not allow logins locally when booting up normally.

Can you post ipconfig /all.