From: David Williams
[mailto:dwilliams AT dtw-consulting DOT com]
Sent: Thursday, March 18, 2010 1:05 PM
To: 'General list for user discussion, questions and support'
Subject: Re: [BackupPC-users] Communicating with a windows laptop on my
workgroup
Answers below.
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Dave Williams
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-----Original Message-----
From: Michael Stowe [mailto:mstowe AT chicago.us.mensa DOT org]
Sent: Thursday, March 18, 2010 12:04 PM
To: dwilliams AT dtw-consulting DOT com; General list for user discussion, questions
and support
Subject: Re: [BackupPC-users] Communicating with a windows laptop on my
workgroup
> I posted this to a Linux forum but also wanted to
post it here since this
> is also relates to backuppc.
Only peripherally, in the sense that if you're using smb
and smb doesn't
work, backuppc won't work.
> I did post something a while back and some mentioned
about modifying
> Samba so that it became a local master.
Anyway, I
> made the changes to my smb.conf file with the
following:
>
> local master = yes
> preferred master = yes
> wins support = yes
>
> That said, I still cannot seem to perform a
nmblookup on a windows laptop
> that is connected to my network that has a dynamic
IP address L
I'm not entirely sure why you'd want to use NMB rather
than DNS; then
again, I don't recommend SMB since rsync is available.
I am by no means an expert in
this area at all, and I am open to looking at other options. I know that
I had the smb method working a while back on a fixed IP address windows
machine. The last time I posted on here with this issue, albeit with less
information, I was asked to make the changes to Samba that I indicated
above. I don't pretend to always understand the ins and outs, just as
long as I can get it working J
> I have just noticed something in my syslog, which I
believe is related to
> a change in my Samba setup. I am using
Backuppc to perform backups on my
> linux server and I was (and still am) having a
problem in that I wasn't
> able to back up any machine that had a dynamic IP
address, namely my
> laptop.
Does it actually resolve via DNS?
This is a home network so to
be honest, I wouldn't even know how to go about testing this. My laptop
is associate to a Workgroup and my Linux server has a static IP address within
the 192.168.15.x range. I can ping the laptop by ip address but I am not
sure what it's normal address would be. For example, would it be
laptop1.workgroup.com ?
> It
> seems that nmblookup will not resolve the ip address
from any machines on
> my
> network. Really not sure what the problem is
since I have very little
> experience with this. Also, I don't remember
what change I made to the
> samba configuration (I had a look but nothing jumped
out) other than it
> had to do with enforcing Samba to act as a Domain
Master if that makes
> sense.
No, it doesn't make sense. What you want (and need)
is a master browser,
which (on a workgroup, not a Windows domain) is elected
from computers on
the segment. N.B.: if you're not on the same
segment and don't have a
domain controller, you can't browse or use nmblookup.
> The errors I am getting in my syslog are as follows:
> nmbd[4123]:
find_domain_master_name_query_fail:
> nmbd[4123]: Unable to find the Domain
Master Browser name XXXXXX<1b> for
> the workgroup XXXXX.
> nmbd[4123]: Unable to sync browse lists
in this workgroup.
That's normal. The local master browser is looking
for a domain master
browser. Which you apparently don't have.
This is indicating that for
whatever reason, samba is not functioning as the
LMB. There may be better
clues when it starts up, since typically that's when the
elections are
held.
In your log.nmbd, you should see this sort of thing:
become_domain_master_browser_bcast:
Attempting to become domain master browser on
workgroup XXXXX on subnet
10.168.0.1
If you're not seeing this, then something's funny with
your smb.conf.
After a restart to Samba
here's what's in my log:
[2010/03/18 13:06:58,
0] nmbd/nmbd_become_lmb.c:395(become_local_master_stage2)
*****
Samba name server
LINUXPC is now a local master browser for workgroup WORKGROUP on subnet
192.168.15.2
*****
[2010/03/18 13:06:58,
0] nmbd/nmbd_browsesync.c:350(find_domain_master_name_query_fail)
find_domain_master_name_query_fail:
Unable to find the
Domain Master Browser name WORKGROUP<1b> for the workgroup WORKGROUP.
Unable to sync browse
lists in this workgroup.
> I'd really appreciate any help that would allow me
to be able to use
> nmblookup (which is what backuppc uses to resolve client
names to an IP
> address) and work out just what I did to samba.
Can you actually browse any windows shares at all?
I'm not at my Linux box right
now, but I'm pretty sure that I can. For example, from my laptop I can
browse the Samba shares that I setup on the Linux box.
> If I try and do a nmblookup for a client I get the
following error
> message:
> nmblookup laptop1
> querying laptop1 on 192.168.15.255
> name_query failed to find name laptop1
Without a local master browser, this is to be expected.
It's roughly
equivalent to doing an nslookup without a DNS server.
I made one change to my smb.conf file and added domain master =
yes
When I now restart Samba I get the following messages:
[2010/03/18 13:38:31, 0] nmbd/nmbd.c:854(main)
nmbd version 3.4.2 started.
Copyright Andrew Tridgell and the Samba Team 1992-2009
[2010/03/18 13:38:31, 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 WORKGROUP,
subnet UNICAST_SUBNET.
[2010/03/18 13:38:31, 0]
nmbd/nmbd_become_dmb.c:351(become_domain_master_browser_wins)
become_domain_master_browser_wins: querying WINS server from
IP 192.168.15.2 for domain master browser name WORKGROUP <1b> on
workgroup WORKGROUP
[2010/03/18 13:38:37, 0]
nmbd/nmbd_become_dmb.c:110(become_domain_master_stage2)
*****
Samba server LINUXPC is now a domain master browser for
workgroup WORKGROUP on subnet UNICAST_SUBNET
*****
[2010/03/18 13:38:37, 0]
nmbd/nmbd_become_dmb.c:292(become_domain_master_browser_bcast)
become_domain_master_browser_bcast:
Attempting to become domain master browser on workgroup WORKGROUP
on subnet 192.168.15.2
[2010/03/18 13:38:37, 0]
nmbd/nmbd_become_dmb.c:305(become_domain_master_browser_bcast)
become_domain_master_browser_bcast: querying subnet
192.168.15.2 for domain master browser on workgroup WORKGROUP
[2010/03/18 13:38:45, 0]
nmbd/nmbd_become_dmb.c:110(become_domain_master_stage2)
*****
Samba server LINUXPC is now a domain master browser for
workgroup WORKGROUP on subnet 192.168.15.2
*****
[2010/03/18 13:38:53, 0]
nmbd/nmbd_become_lmb.c:395(become_local_master_stage2)
*****
Samba name server LINUXPC is now a local master browser for
workgroup WORKGROUP on subnet 192.168.15.2
*****
So, I would say that it's now a DMB. That said, I can still not
do a nmblookup laptop1 and still get the same errors. Perhaps I need to reboot
the laptop so that it reconnects to the network. Will give that a try tonight
and see if it works.
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