Linux Box Blocking Network Neighborhood

Thu Oct 12 21:21:57 GMT 2000

> -----Original Message-----
> From: Allen, Michael B (RSCH) [mailto:Michael_B_Allen at ml.com]
> Subject: Linux Box Blocking Network Neighborhood
> 
> One of the master browsers on our corporate network failed to 
> communicate the entire list of hosts for the segment to the
> domain master browser. Computer support tracked down the
> failing master browser to find it was a Linux machine running
> Samba...

I've had a closer look at the errord Linux machine. Below is the result of
my diagnostic script at the bottom of this message.

So it cannot even find the domain master browser? If I do the following on
that machine:

nmblookup -U 147.126.88.66 -R grp-ny#1b
querying rsch-ny on 147.127.88.66
172.12.33.188 grp-ny<1b>

Looks good to me. So the machine can find the domain master browser via
nmblookup. Maybe as DCB says it's a NetBUEI/Netware problem? But also not
the network address ends in 192? That's wrong I think(at least all the
machines I  know of have 0 but INANE). Also the nmblookup -A 127.0.0.1
failed to show any names. Weird b/c this works on my machine which is also
RH6.2. But from my machine I can do the node status on it and it looks
normal. Weird this didn't knock out the browse list for that whole segment.
I guess the secondary master kicked in?

I've added 'local master = no' and restarted smb but I'd really like to give
the network guys a good explaination. Any help would be appreciated.

Thanks,
Michael B. Allen
http://jcifs.samba.org

--
[Red Hat 6.2]
Linux msmith.rs.dd.ml.com 2.2.14-5.0 #1 Tue Mar 7 21:07:39 EST 2000 i686
unknown
msmith.rs.dd.ml.com
eth0      Link encap:Ethernet  HWaddr 00:81:5E:49:D6:D8
          inet addr:172.12.186.247  Bcast:172.12.186.255
Mask:255.255.255.192
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1043 errors:0 dropped:0 overruns:0 frame:0
          TX packets:296 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          Interrupt:11 Base address:0x1400 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:3924  Metric:1
          RX packets:41 errors:0 dropped:0 overruns:0 frame:0
          TX packets:41 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt
Iface
172.12.186.247  0.0.0.0         255.255.255.255 UH        0 0          0
eth0
172.12.186.192  0.0.0.0         255.255.255.192 U         0 0          0
eth0
127.0.0.0       0.0.0.0         255.0.0.0       U         0 0          0 lo
0.0.0.0         172.12.186.252  0.0.0.0         UG        0 0          0
eth0

Looking up status of 127.0.0.1
received 0 names
num_good_sends=0 num_good_receives=0

[the above nmblookup -A 127.0.0.1 failed? But I can do it from another
machine. It looks totally normal]

Version 2.0.6

[global]
   workgroup = GRP-NY
   server string = msmith
   printcap name = /etc/printcap
   load printers = yes
   log file = /var/log/samba/log.%m
   max log size = 50
   security = user
  encrypt passwords = yes
  smb passwd file = /etc/smbpasswd
   socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
   wins server = 147.126.88.66
   dns proxy = no 
[homes]
   comment = Home Directories
   browseable = no
   writable = yes
[printers]
   comment = All Printers
   path = /var/spool/samba
   browseable = no
   guest ok = no
   writable = no
   printable = yes
[2000/10/12 14:53:33, 1] nmbd/nmbd.c:main(747)
  Netbios nameserver version 2.0.6 started.
  Copyright Andrew Tridgell 1994-1998
------------------------------------
  Unable to find the Domain Master Browser name GRP-NY<1b> for the workgroup
GRP-NY.
  Unable to sync browse lists in this workgroup.
[2000/10/12 09:12:08, 0]
nmbd/nmbd_browsesync.c:find_domain_master_name_query_fail(362)
  find_domain_master_name_query_fail:
  Unable to find the Domain Master Browser name GRP-NY<1b> for the workgroup
GRP-NY.
  Unable to sync browse lists in this workgroup.
[2000/10/12 09:27:08, 0]

... add infinitum

<snip>
> It
> was only a miscommuniation between the Linux machine and the 
> domain master
> browser.
>
<snip>
> Actually I thought I might just run the following script. 
> Anyone care to add
> to the diagnostics I should perform?
> 
> #/bin/sh
> 
> PATH=/bin:/usr/bin:/usr/sbin:/usr/local/bin:/sbin
> 
> uname -a
> hostname
> ifconfig
> netstat -rn
> nmblookup -A 127.0.0.1
> smbd -V
> cat /etc/smb.conf | awk '/^[    ]*[^#;]/ { print }'
> tail -100 /var/log/samba/log.nmb
> echo '------------------------------------'
> tail -100 /var/log/samba/log.nmb.1
> 
> Thanks,
> Mike
> 
> 
> 