It is definitely an issue with the WINS server which returns the old IP address

# nmblookup -U 172.27.88.81 -R 'MRIRESEARCH#1b'
querying MRIRESEARCH on 172.27.88.81
132.183.202.95 MRIRESEARCH<1b>

SO it is not automatically picking up the IP change which happened 4 days ago
and I have restarted samba on my PDC several times.  The old IP is definitely
not in /etc/hosts anymore or anywhere in smb.conf.  It only shows up in
gencache.tdb in the files /var/lib/samba even though I keep deleting that
file when I restart.

WINS is a total mystery to me.  How is this supposed to work?

-- Paul Raines (http://help.nmr.mgh.harvard.edu)



On Tue, 4 Sep 2012 12:00pm, Paul Raines wrote:

I have no idea what the WINS server is except that I am sure it running on Windows since they are totally Windows-based organization. So the WINS server is definitely the problem? When I talk to them and mention I am using Samba on Linux they may totally just say "we don't support it" and hang up.

It seems a strange design that a WINS server can take precedence over
my explicit "password server" setting in my smb.conf file.

-- Paul Raines (http://help.nmr.mgh.harvard.edu)



On Tue, 4 Sep 2012 11:21am, Robert Adkins II wrote:

More information is required.

What is the WINS server running OS wise? Can you work with the IT Staff in
charge of that WINS Server?

--

Regards,
Robert Adkins



-----Original Message-----
From: Paul Raines [mailto:rai...@nmr.mgh.harvard.edu]
Sent: Tuesday, September 04, 2012 11:16 AM
To: Robert Adkins II
Cc: samba@lists.samba.org
Subject: RE: [Samba] Changed PDC IP, all hell broke lose


I am not running winbindd on the server.  I am using the WINS
server of my hospital which I have no control over.

I have already tried deleting browse.dat (I do not see the
other two files anywhere) to no avail.

So my fear is that this is all happening because the WINS
server is refusing to recognize the change since I cannot do
anything about it. Is that the issue?  Is there anyway to
force a WINS server to change the IP it has a for domain
master browser?

-- Paul Raines (http://help.nmr.mgh.harvard.edu)



On Tue, 4 Sep 2012 10:59am, Robert Adkins II wrote:

It's most likely that your server has the old IP Address
Cached in the
wins.dat, browse.dat, browse.tdb.

I recommend the following:

Shutdown the windbind, nmbd and smbd services.

Back up each of the above mentioned files.

Delete the original above named files.

Restart your services and then see if you can connect.

You may also need to edit your samba configuration file to point to
the new server IP Address as the PDC Master Browser. (Assuming you
didn't already do
that.)

The problem is that your server is telling clients to
attempt to find
it on a network that no longer exists.

--

Regards,
Robert Adkins II



-----Original Message-----
From: samba-boun...@lists.samba.org
[mailto:samba-boun...@lists.samba.org] On Behalf Of Paul Raines
Sent: Tuesday, September 04, 2012 10:41 AM
To: samba@lists.samba.org
Subject: [Samba] Changed PDC IP, all hell broke lose


I had to move my RedHat 5 box acting as a PDC to a new IP
address. It
is running samba 3.5.10.  After the move, none of my
windows or linux
samba clients worked anymore.  I tried rejoining some to
the domain,
but would get error

Unable to find a suitable server
Join to domain 'MRIRESEARCH' is not valid


The old PDC IP address is 132.183.202.95 and nothing is at that IP
anymore (for 4 days now).  The new IP is 172.21.21.35

I ran 'net -d 10 join' and would see it was still trying
to connect
to the old IP address.  I tried 'net cache flush' to no avail.  I
shut down samba, removed every file in /var/cache/samba
and still no
change.
It tries to go to the old IP address.

On the PDC box, I increase 'os level' from 60 to 70,
stopped the nmbd
and smbd processes, did a 'net flush cache' and restarted nmbd and
smbd. Still it fails and the nmbd log as the following.

==========
[2012/09/04 10:09:25,  0] nmbd/nmbd.c:857(main)
   nmbd version 3.5.10-0.110.el5_8 started.
   Copyright Andrew Tridgell and the Samba Team 1992-2010
[2012/09/04 10:09:25.716397,  0]
nmbd/nmbd_logonnames.c:160(add_logon_names)
   add_domain_logon_names:
   Attempting to become logon server for workgroup MRIRESEARCH on
subnet 172.21.21.35
[2012/09/04 10:09:25.716599,  0]
nmbd/nmbd_logonnames.c:160(add_logon_names)
   add_domain_logon_names:
   Attempting to become logon server for workgroup MRIRESEARCH on
subnet 192.168.0.150
[2012/09/04 10:09:25.716671,  0]
nmbd/nmbd_logonnames.c:160(add_logon_names)
   add_domain_logon_names:
   Attempting to become logon server for workgroup MRIRESEARCH on
subnet UNICAST_SUBNET
[2012/09/04 10:09:25.716768,  0]
nmbd/nmbd_become_dmb.c:337(become_domain_master_browser_wins)
   become_domain_master_browser_wins:
   Attempting to become domain master browser on workgroup
MRIRESEARCH, subnet UNICAST_SUBNET.
[2012/09/04 10:09:25.716828,  0]
nmbd/nmbd_become_dmb.c:351(become_domain_master_browser_wins)
   become_domain_master_browser_wins: querying WINS server from IP
0.0.0.0 for domain master browser name MRIRESEARCH<1b> on
workgroup
MRIRESEARCH
[2012/09/04 10:09:25.722744,  0]
nmbd/nmbd_logonnames.c:121(become_logon_server_success)
   become_logon_server_success: Samba is now a logon server for
workgroup MRIRESEARCH on subnet UNICAST_SUBNET
[2012/09/04 10:09:25.722928,  0]
nmbd/nmbd_become_dmb.c:235(become_domain_master_query_success)
   become_domain_master_query_success:
   There is already a domain master browser at IP
132.183.202.95 for workgroup MRIRESEARCH registered on subnet
UNICAST_SUBNET.
[2012/09/04 10:09:29.096239,  0]
nmbd/nmbd_logonnames.c:121(become_logon_server_success)
   become_logon_server_success: Samba is now a logon server for
workgroup MRIRESEARCH on subnet 172.21.21.35
[2012/09/04 10:09:29.096382,  0]
nmbd/nmbd_logonnames.c:121(become_logon_server_success)
   become_logon_server_success: Samba is now a logon server for
workgroup MRIRESEARCH on subnet 192.168.0.150
[2012/09/04 10:09:49.731244,  0]
nmbd/nmbd_become_lmb.c:395(become_local_master_stage2)
   *****

   Samba name server PDC-NMR is now a local master browser for
workgroup MRIRESEARCH on subnet 172.21.21.35

   *****
[2012/09/04 10:09:49.731468,  0]
nmbd/nmbd_become_lmb.c:395(become_local_master_stage2)
   *****

   Samba name server PDC-NMR is now a local master browser for
workgroup MRIRESEARCH on subnet 192.168.0.150

   *****
[2012/09/04 10:10:10.732440,  0]
nmbd/nmbd_browsesync.c:247(domain_master_node_status_fail)
   domain_master_node_status_fail:
   Doing a node status request to the domain master browser
   for workgroup MRIRESEARCH at IP 132.183.202.95 failed.
   Cannot sync browser lists.
[2012/09/04 10:10:10.732636,  0]
nmbd/nmbd_browsesync.c:247(domain_master_node_status_fail)
   domain_master_node_status_fail:
   Doing a node status request to the domain master browser
   for workgroup MRIRESEARCH at IP 132.183.202.95 failed.
   Cannot sync browser lists.

=============================================

Where is it still getting the old IP address?

The the clients are all set with

    remote announce = 172.27.88.81
    wins server = 172.27.88.81
    security = domain
    password server = pdc.nmr.mgh.harvard.edu
    workgroup = MRIRESEARCH

The WINS server is run by central IT group of the hospital
and I have
no control over it.

DNS is properly changed:

# host pdc.nmr.mgh.harvard.edu
pdc.nmr.mgh.harvard.edu is an alias for
raidsrv01.nmr.mgh.harvard.edu.
raidsrv01.nmr.mgh.harvard.edu has address 172.21.21.35

---------------------------------------------------------------
Paul Raines                     http://help.nmr.mgh.harvard.edu
MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging
149 (2301) 13th Street     Charlestown, MA 02129            USA





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