Bind Samba server to specific IP

By default, a Samba server will listen for connections on all the interfaces of the host. This can be verified by:

# netstat -tulpn | egrep "samba|smbd|nmbd|winbind"
tcp    0    0 0.0.0.0:139         0.0.0.0:*       LISTEN      30352/smbd
tcp    0    0 0.0.0.0:445         0.0.0.0:*       LISTEN      30352/smbd
tcp    0    0 :::139              :::*            LISTEN      30352/smbd
tcp    0    0 :::445              :::*            LISTEN      30352/smbd

To bind the server to a specific IP or interface, add the following lines to the [global] section of Samba's configuration:

bind interfaces only = yes
interfaces = lo eth0

That will make the server listen to connections only to lo and eth0. The value of the interfaces parameter, can also be an IP, like:

interfaces = 10.1.2.3

For further information, see the man page for smb.conf.

See also

  • The Samba port usage article in the Samba Wiki explains a bit more on why it might be necessary to have the server listening on the lo interface.