unrecognized item on my internal nic, how to prevent phonning home

Hi.  I have a linux server using iptables 1.8 and shorewall version
5.2.8.  I have two nics in the box, one for the outside world and an
internal nic for various computers.  I have two items in there which I
cannot identify -- even using nmap and I would like to prevent them
from accessing the outside.  Any way to do this with shorewall?

Let me know if you need any more information.

Thanks in advance for any suggestions.

-- 
Your life is like a penny.  You're going to lose it.  The question is:
How do
you spend it?

         John Covici wb2una
         [email protected]