[Samba] Problem with winbind and nsswitch.conf on Solaris 8 server

David Legge David.Legge at dier.tas.gov.au
Sun Jan 4 23:49:02 GMT 2004


I'm having some problems using winbind on Samba 3.0.1 with /etc/nsswitch.conf on a Solaris 8 server. The Solaris 8 release is 10/00.

The basic problem that I have is that there are restrictions on what nsswitch.conf can contain if password ageing is used. 

My setup is that users connecting to shares on the Solaris samba server are authenticated against a accounts on a Windows Active Directory Domain. (That is, smb.conf is configured to use "security = ADS"). I am using winbind on the Solaris samba server to enumerate Active Directory Domain users and groups as standard unix groups and users.

I have installed the winbind libraries thus:

cp libnss_winbind.so /lib
ln -s /usr/lib/libnss_winbind.so /usr/lib/libnss_winbind.so.1
ln -s /usr/lib/libnss_winbind.so /usr/lib/nss_winbind.so.1
ln -s /usr/lib/libnss_winbind.so /usr/lib/nss_winbind.so.2

I have also edited /etc/nsswitch.conf from using 

passwd:     files
group:      files


passwd:     files winbind
group:      files winbind

The problem that I have is that there are restrictions on what nsswitch.conf can contain if password ageing is used.

This is indicated in the Solaris 8 man page for nsswitch.conf(4), which says:

  Interaction with Password Aging
     When password aging is turned on, only a limited set of pos-
     sible  name  services are permitted for the passwd: database
     in the /etc/nsswitch.conf file:


                files nis

                files nisplus

                files ldap





     Any other settings will cause the passwd(1) command to  fail
     when it attempts to change the password after expiration and
     will prevent the user from logging in. These  are  the  only
     permitted  settings  when password aging has been turned on.
     Otherwise, you can work around incorrect  passwd:  lines  by
     using  the  -r  repository argument to the passwd(1) command
     and using passwd -r repository to override the nsswitch.conf
     settings  and  specify  in  which  name  service you want to
     modify your password.

So, using winbind like this forces me to use `passwd -r files` to do operations using the passwd command.

If I don't use the "-r" switch on the password command, an error is produced due to the presense of winbind in the nsswitch.conf file. The error is

passwd: Unsupported nsswitch entry for "passwd:". Use "-r repository ".

We have some applications that will break because of this and we have to use password ageing because of our security policy.

Is there any way of overcoming this limitation with nsswitch.conf and winbind on Solaris 8?


David Legge

David Legge Ph.D.
Corporate Applications Server Support Officer
Information Management Branch
Department of Infrastructure, Energy and Resources

10 Murray Street, Hobart

GPO Box 936, Hobart, 7001
Tasmania, Australia

Telephone:  (03) 62337148
Facsimile:  (03) 62332573

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