samba - Sep 2011 - Samba: Domain "Skolelinux" not available if IP beyond 10.0.2.239

Dear list,

our Debian Edu system used to be stable like a rock.
After holidays, I encountered an issue as follows:

The last 8 of 20 clients in our cabinet cannot log in to samba,
their message is "domain not available".

I checked cables and switches - and IPs (from 2nd boot
partition running Debian Edu without problem), nothing
that differs from other machines.

It stroke me that all clients concerned were in an IP range
of 10.0.2.240 upwards (static190).

Then, I changed dhcpd.conf, giving those clients lower IPs
(there was a gap in static62..70).

And, indeed: Now those clients were also able to login!
All butt the last one (that got no free IP in dhcpd).

There were no other changes AFAIK, can anybody explain
this behaviour, i.e. rejection of clients with specific IPs?

Thank you very much,
I like to sort out the origin of this issue ASAP, because
I need to report tickets to our support compony (without
giving them the chance to blame Skolelinux)

Bye
Ralf

P.S.: Maybe there is a connection to this changes:
- I added a course of 85 students, now we got >> 1000 users)
- I added a corresponding share
- another share (restricted access) is not available anymore
  recently, while testparm reports no issues, and any other
  share is working.

Hi

On 8 September 2011 15:10, RalfGesellensetter <rgx at gmx.de>
wrote:
> Dear list,
>
> our Debian Edu system used to be stable like a rock.
> After holidays, I encountered an issue as follows:
>
> The last 8 of 20 clients in our cabinet cannot log in to samba,
> their message is "domain not available".
>
> I checked cables and switches - and IPs (from 2nd boot
> partition running Debian Edu without problem), nothing
> that differs from other machines.
>
> It stroke me that all clients concerned were in an IP range
> of 10.0.2.240 upwards (static190).
>
> Then, I changed dhcpd.conf, giving those clients lower IPs
> (there was a gap in static62..70).
>
> And, indeed: Now those clients were also able to login!
> All butt the last one (that got no free IP in dhcpd).
>
> There were no other changes AFAIK, can anybody explain
> this behaviour, i.e. rejection of clients with specific IPs?
>
> Thank you very much,
> I like to sort out the origin of this issue ASAP, because
> I need to report tickets to our support compony (without
> giving them the chance to blame Skolelinux)
>
> Bye
> Ralf
>
> P.S.: Maybe there is a connection to this changes:
> - I added a course of 85 students, now we got >> 1000 users)
> - I added a corresponding share
> - another share (restricted access) is not available anymore
> ?recently, while testparm reports no issues, and any other
> ?share is working.
Check that the server can ping the clients and vice versa.  Also check
the netmask on the server and clients to make sure it is correct
(probably 255.255.255.0).  Have a look at the hosts allow/hosts deny
parameters in smb.conf to make sure that they are not restricting
access to some of the machines.

-- 
Michael Wood <esiotrot at gmail.com>