Unused IP On Static Network is Pingable

I run an old school NT server w/ about half a dozen windows and
linux boxes on my home LAN. All hard wired with static IP's.

I was just going through my router logs (linksys befsr41 v3 w/
updated firmware) and I noticed packets to and from IP
192.168.0.200. This IP is assigned to my network printer but
that printer is currently disconnected. I pinged the IP and
got replies!

As an aside, I also notice that some times the zonealarm
firewalls on my windoze machines will flag spooler sub system
for trying to access the internet zone. This usually happens
when I connect to a share on another machine. All my machines
are in the trusted zone (private ip block 192.168.0.0 -
192.168.0.256) so I see no need for the spooler to look else
where.

To top it all off, I also noticed that my routers DMZ was set
to the same IP (192.168.0.200) I recently set on of my boxes up
in the DMZ for some temporary torrent downloads (legal linux
distos) but the 192.168.0.200 ip was not the one I set up!

I disabled DMZ and rebooted the router but was still able to
ping the 192.168.0.200 address for over an hour before it
finally stopped responding.

I don't have a clue about why a device would respond to pings
when it is not even connected to the LAN nor why my DMZ address
would be automagically changed so I am assuming that somethings
been hacked. I can't find anything on the boxes, no rootkits,
spyware, virus's etc.

I know zonealarms not the best but I don't have cash to buy
anything better especially for NT server. Nevertheless, I
haven't had a problem with this set up in over six years. Any
ideas?

Thanks in advance,

Deb
.

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