It seems like on Sat, Jul 08, 2000 at 12:39:40PM -0700, David Demland scribbled:
Orig Msg> In the last two days I have been getting probed by an IP 200.1.28.20

They are university systems.
Filter them, it's the only way to be sure.

Here is the first one.

Universidad Tecnica Federico Santa Maria (NETBLK-UTFSM) NETBLK-UTFSM
                                                       200.1.16.0 - 200.1.31.0
Universidad Tecnica Federico Santa Maria (NET-UTFSM-13) UTFSM-13    200.1.28.0


Orig Msg> Reply from 146.83.240.200: Destination net unreachable.

Here is the second.

Red Universitaria Nacional (NET-REUNA)
   Canada 239 Providencia6640806
   CL

   Netname: REUNA
   Netnumber: 146.83.0.0

   Coordinator:
      Espinoza, Octavio  (OE-ARIN)  oespinoz@REUNA.CL
      56-2-3370300

   Domain System inverse mapping provided by:

   TERMINUS.REUNA.CL            146.83.183.94
   NS.DCC.UCHILE.CL             146.83.4.11
   SPARKY.CCMAIL.COM            192.216.79.100
   NS.UU.NET                    137.39.1.3