I have a small network, consisting mostly of Cisco devices (some of which 
are old enough to only support telnet), and have noticed something odd.

When I add a device into the system, all the ports are detected correctly. 
Telnet, ssh, ftp, ntp, etc. depending on what services are running on the 
particular device.  However, if the telnet port is ever unreachable, it 
changes its status to "closed" and then never changes back.  I can telnet 
to the devices in question from the jffnms server, it just doesn't seem to 
realize it.  Services on other ports behave themselves properly, and 
change their status back to "open" as soon as the device is reachable 
again.

I am not finding anything in the manual or the mailing lists 
which might cause and/or alleviate this behaviour (though sometimes I am 
known to miss the obvious.)  Does anybody have any ideas?

LMP

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