[Samba] Samba BDC rejected or stuck waiting

[julien Chaffraix]

Hello all,

First, I am new to Samba so maybe I will made some mistakes in my 
interpretation, so be cool.

since an migration from my BDC NOVA (from linux to FreeBSD, which also 
upgraded Samba), my BDC can't remain BDC more that a couple of days. The 
network it is in is a class-B heterogene network (both linux and 
windows). The server is alone on the network and no authentification is 
done on the computers on the network.

I have enquiried a lot on the problem and it seems that some users 
(around 10 computers mostly Windows XP workstation) refuse the 
registration paquet for being master browser :

[2006/10/18 23:35:20, 0] 
nmbd/nmbd_nameregister.c:register_name_response(130)
  register_name_response: server at IP 10.0.191.195 rejected our name 
registration of MYDOMAIN<1d> IP 10.0.1.246 with error code 6.
[2006/10/18 23:35:20, 5] 
nmbd/nmbd_nameregister.c:register_name_response(147)
  register_name_response: failure in registering name MYDOMAIN<1d> IP 
10.0.1.246 with 10.0.255.255.
[2006/10/18 23:35:20, 0] 
nmbd/nmbd_become_lmb.c:become_local_master_fail2(417)
  become_local_master_fail2: failed to register name MYDOMAIN<1d> on 
subnet 10.0.1.246. Failed to become a local master browser.
[2006/10/18 23:35:20, 4] 
nmbd/nmbd_workgroupdb.c:find_workgroup_on_subnet(171)
  find_workgroup_on_subnet: workgroup search for MYDOMAIN on subnet 
10.0.1.246: found.
[2006/10/18 23:35:20, 2] 
nmbd/nmbd_become_lmb.c:unbecome_local_master_browser(280)
  unbecome_local_master_browser: unbecoming local master for workgroup 
MYDOMAIN on subnet 10.0.1.246


This seems to block for a while the master browser registration process. 
It restarts but the server seems to be stuck waiting potential browser 
state and a windows computer takes its role.

[2006/10/18 23:23:29, 2] nmbd/nmbd_elections.c:run_elections(204)
  run_elections: >>> Won election for workgroup MYDOMAIN on subnet 
10.0.1.246 <<<
[2006/10/18 23:23:29, 2] 
nmbd/nmbd_become_lmb.c:become_local_master_browser(525)
  become_local_master_browser: Awaiting potential browser state. Current 
state is 5

I add my configuration and the conversation that I think lead to the 
problem.

Any help would be great,

Julien Chaffraix

nova# testparm
Load smb config files from /usr/local/etc/smb.conf
Processing section "[partage]"
Loaded services file OK.
Server role: ROLE_DOMAIN_BDC
Press enter to see a dump of your service definitions

[global]
        workgroup = MYDOMAIN
        server string = Serveur DHCP, DNS, News ...
        map to guest = Bad User
        passdb backend = tdbsam
        log level = 3
        syslog = 0
        log file = /var/log/samba/log.%m
        domain logons = Yes
        os level = 230
        preferred master = Yes
        domain master = No
        dns proxy = No
        hosts allow = 10.0., 127.

[partage]
        comment = Partage de Nova
        path = "/home/partage"
        guest ok = Yes

18:46:23.071019 IP (tos 0x0, ttl 64, id 21850, offset 0, flags [none], 
proto: UDP (17), length: 96) nova.mydomain.netbios-ns > 
10.0.255.255.netbios-ns: [bad udp cksum c47b!]

 >>> NBT UDP PACKET(137): REGISTRATION; REQUEST; BROADCAST

TrnID=0xDA3

OpCode=5

NmFlags=0x11

Rcode=0

QueryCount=1

AnswerCount=0

AuthorityCount=0

AddressRecCount=1

QuestionRecords:

Name=MYDOMAIN NameType=0x1D (Master Browser)

QuestionType=0x20

QuestionClass=0x1


ResourceRecords:

Name=MYDOMAIN NameType=0x1D (Master Browser)

ResType=0x20

ResClass=0x1

TTL=0 (0x0)

ResourceLength=6

ResourceData=

AddrType=0x0

Address=10 (0xa).0 (0x0).1 (0x1).246 (0xf6)


18:46:23.071515 IP (tos 0x0, ttl 128, id 47604, offset 0, flags [none], 
proto: UDP (17), length: 90) user.mydomain.netbios-ns > 
nova.mydomain.netbios-ns:

[udp sum ok]

 >>> NBT UDP PACKET(137): REGISTRATION; NEGATIVE; RESPONSE; UNICAST

TrnID=0xDA3

OpCode=5

NmFlags=0x58

Rcode=6

QueryCount=0

AnswerCount=1

AuthorityCount=0

AddressRecCount=0


ResourceRecords:

Name=MYDOMAIN NameType=0x1D (Master Browser)

ResType=0x20

ResClass=0x1

TTL=0 (0x0)

ResourceLength=6

ResourceData=

AddrType=0x4000

Address=10 (0xa).0 (0x0).189 (0xbd).237 (0xed)