[Samba] Trouble while join domain from Windows 2k/SP3 looking for SRV records

Bruno Bonfils bonfils at fimasys.fr
Mon Sep 20 16:17:41 GMT 2004


i have trouble when I'm trying to join a 2ktest SP 3 box into a samba
3 domain.

[2. samba 3 configuration --- application/octet-stream; smb.conf]...

The 2ktest (it's the name of the box) have as IP
Address, the samba 3 have

Here the tcpdump output when i try to join the domain :

FMSTST is the workgroup name defined in smb.conf 

16:53:17.829963 >  18+ SRV? _ldap._tcp.dc._msdcs.FMSTST. (45)

Windows complains about it can't find the name FMSTST

so, i set up a bind with some entries (especially one SRV record)

domain.tld.             600     IN      A
domain.tld.             600     IN      A
domain.tld.             3600    IN      NS      srv-18.domain.tld.
domain.tld.             3600    IN      MX      9 srv-19.domain.tld.

srv-18                  IN      A
pdc-fmstst              IN      A
2ktest                  IN      A
_ldap._tcp.dc._msdcs    IN      SRV     10 10 389 srv-18.domain.tld.

now, i try to join the domain domain.tld, then i have the following
tcpdump output :

16:58:50.413893 >  20+ SRV? _ldap._tcp.dc._msdcs.fimasys.fr. (49)
16:58:50.414409 >  20* 1/2/1 (151) (DF)
16:58:50.420354 >  udp 122
16:58:50.420413 > icmp: udp port ldap unreachable [tos 0xc0]

Why Windows try to access to LDAP server via *UDP* port ?

I also try with a Windows XP, i have the same error, it try to find
some SRV records.

I don't understand where i'm wrong. I already success to have
samba3/ldap as PDC but with more older Windows as members. Note I
_can_ browser the PDC via its name (PDC-FMSTST) using IE (via
\\pdc-fmstst). I join my samba 3 configuration, but I think the
problem don't comes from samba.

Thanks for your help

Bruno Bonfils

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