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)