samba - Mar 2006 - domain controller cannot be contacted

Hi everyone,

I have struggled with this problem for awhile now. randomly and 
intermittently a workstation or
bunch of workstations will not be able to log in.

This is pretty much reproduceable at will, and here is what you need to 
do to get this little issue to show up:
1. Log out and try to log in as a different user
2. Attempt to login immediately after the machine is booted.

To ensure you can log in, if you boot your workstation in the morning 
and wait 2-3 minutes before trying to log in
you can log in no problem.

I have replaced our switch, cabling, network cards, tried many many 
things......
I took this a step further. I got 3 machines rounded up and built a mini 
network with its own switch.
Only these 3 machines were on this switch.
Of these 3 machines I installed a fresh copy of windows xp with sp2 on 
two of them.
Took our current config and slapped it onto the third machine running 
gentoo + samba

These 3 machines had not been exposed to our main network...
what makes this all so interesting..... I was able to join these 2 
workstations no problem with
default settings, no registry patches, nothing and it just worked.

I tried to reproduce this problem with this little test network and our 
smb.conf for hours on end.
It just never happened.

On our main network I can get this to occur every 2 minutes if I wanted to.
Our samba machine is doing wins as well, and the machines get this wins 
server info with their dhcp info.


Any ideas? Anything at all? This issue is...... just too hard to me to 
figure out.
Also, no indication of an error in any logs.

You know "User Hive Cleanup Service for XP, if not install it.
http://www.microsoft.com/downloads/details.aspx?familyid=1B286E6D-8912-4E18-
B570-42470E2F3582&displaylang=en


I experienced problemen with loggin's because some programs 
badly closes the registry, of a old connection with samba stays
open.

Louis
 
>-----Oorspronkelijk bericht-----
>Van: samba-bounces+louis=van-belle.nl@lists.samba.org 
>[mailto:samba-bounces+louis=van-belle.nl@lists.samba.org] 
>Namens Mark Rutherford
>Verzonden: woensdag 29 maart 2006 16:45
>Aan: samba@lists.samba.org
>Onderwerp: [Samba] domain controller cannot be contacted
>
>Hi everyone,
>
>I have struggled with this problem for awhile now. randomly and 
>intermittently a workstation or
>bunch of workstations will not be able to log in.
>
>This is pretty much reproduceable at will, and here is what 
>you need to 
>do to get this little issue to show up:
>1. Log out and try to log in as a different user
>2. Attempt to login immediately after the machine is booted.
>
>To ensure you can log in, if you boot your workstation in the morning 
>and wait 2-3 minutes before trying to log in
>you can log in no problem.
>
>I have replaced our switch, cabling, network cards, tried many many 
>things......
>I took this a step further. I got 3 machines rounded up and 
>built a mini 
>network with its own switch.
>Only these 3 machines were on this switch.
>Of these 3 machines I installed a fresh copy of windows xp with sp2 on 
>two of them.
>Took our current config and slapped it onto the third machine running 
>gentoo + samba
>
>These 3 machines had not been exposed to our main network...
>what makes this all so interesting..... I was able to join these 2 
>workstations no problem with
>default settings, no registry patches, nothing and it just worked.
>
>I tried to reproduce this problem with this little test 
>network and our 
>smb.conf for hours on end.
>It just never happened.
>
>On our main network I can get this to occur every 2 minutes if 
>I wanted to.
>Our samba machine is doing wins as well, and the machines get 
>this wins 
>server info with their dhcp info.
>
>
>Any ideas? Anything at all? This issue is...... just too hard to me to 
>figure out.
>Also, no indication of an error in any logs.
>
>
>-- 
>To unsubscribe from this list go to the following URL and read the
>instructions:  https://lists.samba.org/mailman/listinfo/samba
>

You know, the strangest thing happened here.....
One thing I neglected to mention and I bet it was vital information, is 
that w have 2 samba machines on the network.
we have one as a spare in case the main server dies.
It is sync'd with the main server every 5 minutes with rsync.

I had to turn that backup machine off to do some hardware maintenance, 
ad it stayed off over the weekend.
This issue disappeared while that machine was turned off.
As soon as I turned this machine on again, the issues started all over 
again.
It was the same 'cannot contact the domain controller' hiccup.

I shut down the samba daemons and the problem went away.
It would seem to me that something, someplace is misconfigured.

This is what is on the main:

domain logons = Yes
os level = 65
lm announce = Yes
preferred master = Yes
domain master = Yes
wins support = Yes

And, this is what is on the backup:

domain logons = Yes
os level = 35
lm announce = Yes
preferred master = Yes
local master = No
domain master = Yes
wins server = 192.168.0.201


Wins server on the backup is pointing at the main server, not sure that 
this is completely right either.
My gut tells me it is one of these settings on one of the servers.

So, does anyone have any idea on how I can get the two machines to coexist?
I have no idea why the clients cannot log in randomly and intermittently 
when both are running.


Louis van Belle wrote:
> It's still from the NT4, when these problems occurred.
> let me know if it works. 
> you could set the os level to 65 ( that's what im having atm. ) 
>
>
> Louis 
>
>   
>> -----Oorspronkelijk bericht-----
>> Van: samba-bounces+louis=van-belle.nl@lists.samba.org 
>> [mailto:samba-bounces+louis=van-belle.nl@lists.samba.org] 
>> Namens Mark Rutherford
>> Verzonden: woensdag 29 maart 2006 18:31
>> Aan: samba@lists.samba.org
>> Onderwerp: Re: [Samba] domain controller cannot be contacted
>>
>> Hi again Louis,
>>
>> I have in my smb.conf:
>>
>> domain logons = Yes
>> os level = 34
>> lm announce = Yes
>> preferred master = Yes
>> domain master = Yes
>> wins support = Yes
>>
>> It is the only server. The clients get the ip of this server via dhcp.
>> I never heard of needing 2 wins server ip addresses, so I'm 
>> interested and I just added that to the dhcpd.conf and 
>> rehashed it. I am going to try that (is my desperation 
>> showing yet? :-D)
>>
>>
>>
>>
>>
>> Louis van Belle wrote:
>>     
>>>  If it always happens after a reboot you could try to set the 
>>> connection timeout lower, somebody correct me if I'm wrong.
>>>
>>> I had this problem also, what you also can so let you samba 
>>>       
>> server act 
>>     
>>> as wins server, and put the wins ip in you XP configuration.
>>>
>>> Als ALWAYS put 2 WINS IP in even if they are the same, this 
>>>       
>> is because 
>>     
>>> of strange windows behavor.
>>>
>>> Also check if your server is the master browser of the network.
>>> if not, make sure only 1 server and preffered the samba server, the
>>> master browser.
>>>
>>> Louis
>>>
>>>   
>>>       
>>>> -----Oorspronkelijk bericht-----
>>>> Van: samba-bounces+louis=van-belle.nl@lists.samba.org
>>>> [mailto:samba-bounces+louis=van-belle.nl@lists.samba.org]
>>>> Namens Mark Rutherford
>>>> Verzonden: woensdag 29 maart 2006 17:44
>>>> Aan: samba@lists.samba.org
>>>> Onderwerp: Re: [Samba] domain controller cannot be contacted
>>>>
>>>> Hi Louis,
>>>>
>>>> The reason I would say this is not it, is because it 
>>>>         
>> always happens 
>>     
>>>> on a reboot.
>>>> You have not logged in yet... so nothing is running.
>>>>
>>>> However, I will have to read up on this issue a bit. Did 
>>>>         
>> not know it 
>>     
>>>> existed.
>>>>
>>>>
>>>> Louis van Belle wrote:
>>>>     
>>>>         
>>>>> You know "User Hive Cleanup Service for XP, if not
install it.
>>>>>
>>>>>       
>>>>>           
>>>> http://www.microsoft.com/downloads/details.aspx?familyid=1B286
>>>>     
>>>>         
>>> E6D-8912-4E18-
>>>   
>>>       
>>>>> B570-42470E2F3582&displaylang=en
>>>>>
>>>>>
>>>>> I experienced problemen with loggin's because some
programs badly
>>>>> closes the registry, of a old connection with samba stays
open.
>>>>>
>>>>> Louis
>>>>>  
>>>>>
>>>>>   
>>>>>       
>>>>>           
>>>>>> -----Oorspronkelijk bericht-----
>>>>>> Van: samba-bounces+louis=van-belle.nl@lists.samba.org
>>>>>>
[mailto:samba-bounces+louis=van-belle.nl@lists.samba.org]
>>>>>> Namens Mark Rutherford
>>>>>> Verzonden: woensdag 29 maart 2006 16:45
>>>>>> Aan: samba@lists.samba.org
>>>>>> Onderwerp: [Samba] domain controller cannot be
contacted
>>>>>>
>>>>>> Hi everyone,
>>>>>>
>>>>>> I have struggled with this problem for awhile now.
randomly and
>>>>>> intermittently a workstation or bunch of workstations 
>>>>>>             
>> will not be 
>>     
>>>>>> able to log in.
>>>>>>
>>>>>> This is pretty much reproduceable at will, and here is
what you
>>>>>> need to do to get this little issue to show up:
>>>>>> 1. Log out and try to log in as a different user 2.
Attempt to
>>>>>> login immediately after the machine is booted.
>>>>>>
>>>>>> To ensure you can log in, if you boot your workstation
in
>>>>>>         
>>>>>>             
>>>> the morning
>>>>     
>>>>         
>>>>>> and wait 2-3 minutes before trying to log in you can
log in no
>>>>>> problem.
>>>>>>
>>>>>> I have replaced our switch, cabling, network cards,
tried
>>>>>>         
>>>>>>             
>>>> many many
>>>>     
>>>>         
>>>>>> things......
>>>>>> I took this a step further. I got 3 machines rounded up
>>>>>>             
>> and built a 
>>     
>>>>>> mini network with its own switch.
>>>>>> Only these 3 machines were on this switch.
>>>>>> Of these 3 machines I installed a fresh copy of windows
xp
>>>>>>         
>>>>>>             
>>>> with sp2 on
>>>>     
>>>>         
>>>>>> two of them.
>>>>>> Took our current config and slapped it onto the third
>>>>>>         
>>>>>>             
>>>> machine running
>>>>     
>>>>         
>>>>>> gentoo + samba
>>>>>>
>>>>>> These 3 machines had not been exposed to our main
network...
>>>>>> what makes this all so interesting..... I was able to 
>>>>>>             
>> join these 2 
>>     
>>>>>> workstations no problem with default settings, no 
>>>>>>             
>> registry patches, 
>>     
>>>>>> nothing and it just worked.
>>>>>>
>>>>>> I tried to reproduce this problem with this little test
>>>>>>             
>> network and 
>>     
>>>>>> our smb.conf for hours on end.
>>>>>> It just never happened.
>>>>>>
>>>>>> On our main network I can get this to occur every 2
minutes if I
>>>>>> wanted to.
>>>>>> Our samba machine is doing wins as well, and the 
>>>>>>             
>> machines get this 
>>     
>>>>>> wins server info with their dhcp info.
>>>>>>
>>>>>>
>>>>>> Any ideas? Anything at all? This issue is...... just
too
>>>>>>         
>>>>>>             
>>>> hard to me to
>>>>     
>>>>         
>>>>>> figure out.
>>>>>> Also, no indication of an error in any logs.
>>>>>>
>>>>>>
>>>>>> --
>>>>>> To unsubscribe from this list go to the following URL 
>>>>>>             
>> and read the
>>     
>>>>>> instructions: 
https://lists.samba.org/mailman/listinfo/samba
>>>>>>
>>>>>>     
>>>>>>         
>>>>>>             
>>>>>   
>>>>>       
>>>>>           
>>>> --
>>>> Thanks!
>>>>
>>>> Mark Rutherford
>>>> Maunz Electronics, Inc.
>>>> 803-791-5860
>>>>
>>>> --
>>>> To unsubscribe from this list go to the following URL and read
the
>>>> instructions:  https://lists.samba.org/mailman/listinfo/samba
>>>>
>>>>     
>>>>         
>>>   
>>>       
>> --
>> Thanks!
>>
>> Mark Rutherford
>> Maunz Electronics, Inc.
>> 803-791-5860
>>
>> --
>> To unsubscribe from this list go to the following URL and read the
>> instructions:  https://lists.samba.org/mailman/listinfo/samba
>>
>>     
>
>
>