samba - Apr 1998 - Am I being hacked?

I am seeing a BUNCH of these type of messages in my log.nmb file.  the IP
address varies, with only 2 different ones showing up.

process_node_status_request: status request for name *<00> from IP
206.139.7.109
 on subnet REMOTE_BROADCAST_SUBNET - name not found.

The other IP address is 192.68.22.214

Unfortunately, the log does not have time stamps, so I don't know when
this is happening.  Neither of these networks are mine (an nslookup shows
lbb.ofthe.net - a local Internet Service Provider and host214.melita.com a
company in Georgia - we are in Texas).

So, my question - what EXACTLY does this message mean?  No, I don't have
ports 137 and 139 blocked, but I supposed I should...

=== Tim

---------------------------------------------------------------------
|  Tim Winders, CNE, MCP         |  Email:  TWinders@SPC.cc.tx.us   |
|  Network Administrator         |  Phone:  806-894-9611 x 2369     |
|  South Plains College          |  Fax:    806-897-4711            |
---------------------------------------------------------------------

>   3) Am I being hacked?
> 	by Tim Winders <twinders@SPC.cc.tx.us>
> I am seeing a BUNCH of these type of messages in my log.nmb file.  the IP
> address varies, with only 2 different ones showing up.
 Only 2? :-)

> process_node_status_request: status request for name *<00> from IP
206.139.7.109
>  on subnet REMOTE_BROADCAST_SUBNET - name not found.
 
 I get these all the time, from a wide varity of source addresses,
some may be our own people (with laptops) on the move, but I imagine
most are 'hackers' looking for NT/Win95 box with a writable share.

 My site get probed all the time. Just the last week some one probed
every IP address looking for IMAP servers.


-- 
Matthew Geier,                          matthew@law.usyd.edu.au
Computer Systems Manager,               +61 2 9351 0240
Law School, University of Sydney        +61 2 9351 0200 (fax)