They are probably running in stealth mode.  
They do not reply to pings.

I would probably recommend to drop all packets coming
from that host.

The Wolf

-> -----Original Message-----
-> From: antispam@demon.com [mailto:antispam@demon.com]
-> Sent: Saturday, July 08, 2000 8:43 PM
-> To: plug-discuss@lists.PLUG.phoenix.az.us
-> Subject: Re: Missing IP?
-> 
-> 
-> The IP address hasn't changed, ip 146.83.240.200 is telling 
-> you that it can't
-> reach that host.  That is the last system in the route to 
-> get to 200.1.28.20.
-> 
-> > In the last two days I have been getting probed by an IP 
-> 200.1.28.20. When I
-> > try to ping the address I get a message:
-> > 
-> > Reply from 146.83.240.200: Destination net unreachable.
-> > I will assume that the computer with the IP I am trying is 
-> off. But since the
-> > IP has been changed to 146.83.240.200. How do I find out 
-> how this is.
-> 
-> 
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->