[Samba] Samba streitet sich um Master Browser und wird kein PDC...

Tue Mar 20 00:41:33 MDT 2012

Dear all,

since yesterday our samba PDC did "loose" his master status within our LAN for the domain "SRG" - since then windows boxes did not "see" the logon server anymore.

	nmblookup -T -M SRG 

is reporting some of the windows machines (one box running since more then a year...).

- net rpc join -S SRG -U root (on the PDC works)
- net rpc join -S 192.168.123.202 -U root (on a client works)
- net rpc join --S SRG -U root (on a client works NOT - "no nmbd around" and srg host got resolved to the wrong one)

Some monthes ago i had a similiar problem - in that case i had a bug in my interface conf in smb.config

I've produced some level 10 logs (full log see urls above) - these lines seems important to me from then.

--- snip ---
2012/03/19 19:12:56,  8] nmbd/nmbd_elections.c:361(check_elections)
  check_elections: Cannot send election packet yet as name SRG<1e> not yet registered on subnet 192.168.123.202
---snap ---

and:

--- snip ---
[2012/03/20 07:35:24,  3] nmbd/nmbd_logonnames.c:138(become_logon_server)
  become_logon_server: go to first stage: register SRG<1c> name
[2012/03/20 07:35:24,  3] nmbd/nmbd_elections.c:77(check_for_master_browser_success)
  check_for_master_browser_success: Local master browser for workgroup SRG exists at IP 192.168.124.242 (just checking).
[2012/03/20 07:35:24,  0] nmbd/nmbd_nameregister.c:73(register_name_response)
  register_name_response: Answer name SRG<00> differs from question name SRG<1c>.
[2012/03/20 07:35:24,  3] nmbd/nmbd_incomingrequests.c:456(process_name_query_request)
  process_name_query_request: Name query from 192.168.124.243 on subnet 192.168.123.202 for name SRG<1d>
[2012/03/20 07:35:26,  0] nmbd/nmbd_logonnames.c:64(become_logon_server_fail)
  become_logon_server_fail: Failed to become a domain master for workgroup SRG on subnet 192.168.123.202. Couldn't register name SRG<1c>.
[2012/03/20 07:35:26,  0] nmbd/nmbd_namelistdb.c:309(standard_fail_register)
--- snap ---

here my [global]:

--- schnipp ---
[global]
        name resolve order = host wins lmhosts bcast
        time server = Yes
        lprm command = lprm -P'%p' %j
        netbios name = SERVER
        lpresume command = lpc release '%p' %j
        logon script = %U.bat
        workgroup = SRG
        os level = 255
        queueresume command = lpc start '%p'
        add machine script = /usr/sbin/useradd  -c Machine -d /var/lib/nobody  -g machines -s /bin/false %u
        max log size = 5000
        log level = 10
        lanman auth = yes
        log file = /var/log/samba/log.%m
        load printers = No
        map acl inherit = Yes
        username level = 15
        #socket options = SO_KEEPALIVE TCP_NODELAY IPTOS_LOWDELAY SO_SNDBUF=8192 SO_RCVBUF=8192
        logon drive = L:
        guest ok = yes
        domain master = Yes
        local master = Yes
        idmap backend = rid:KPAK=100-100000000
        winbind use default domain = yes
        passdb backend = tdbsam
        logon home = \\%L\%U
        wins support = Yes
        case sensitive = No
        dos filetime resolution = Yes
        netbios aliases = audioserv
        server string = PDC
        queuepause command = lpc stop '%p'
        preexec = /usr/local/bin/netlogon %U
        logon path = \\%L\profiles\%U
        client lanman auth = yes
        lppause command = lpc hold '%p' %j
        preferred master = Yes
        winbind cache time = 1
        domain logons = Yes
        #add machine script = /usr/sbin/useradd  -c Machine -d /var/lib/nobody  -g machines -s /bin/false %m$
        interfaces = 192.168.123.202/255.255.0.0 127.0.0.1/255.0.0.0
        hosts allow = 192.168.123. 192.168.124. localhost
        bind interfaces only = yes

--- schnapp ---

...nmbd seems to hear "properly":

~ # netstat -atun|grep 137
udp        0      0 192.168.255.255:137     0.0.0.0:*                          
udp        0      0 192.168.123.202:137     0.0.0.0:*                          
udp        0      0 0.0.0.0:137   

The correct PDC should be 192.168.123.202 - the current wrong one is 192.168.124.242

For testing purposes i still tried to remove wins.dat und browse.dat as some caches to let samba create it freshly.

Here is a level 10 log from nmbd:

	http://217.171.190.10/srg.debug.txt

Output from nbmlookup -T -M SRG (Level 10) here:

	http://217.171.190.10/srg.nmblookup.txt

It would be very nice to get any input  - many thanks in advance for any hint or tip!...

best regards,

Niels.
-- 
 ---
 Niels Dettenbach
 Syndicat IT & Internet
 http://www.syndicat.com
 ---

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