Here's the problem,
I got Nagios3.2.1 installed on ubuntu server 10.10
I have 2 devices that over time, seems to be down (I use ping test at 10 minutes frequency)
if I do a manual ping from the server to the devices the packet are sent but never received.
if I use my pc for example and ping that very same device, the device reply to my pc.
both pc and servers are on same networks.
is there somewhere in ubuntu that when multiple packet are invalid from a device that it prevents communication with the device?
after an electrical maintenance the camera and the server were shut down and restarted,
the 2 devices that were doing the problem was working properly for about 1 month.
and now I have the very same problem.
if there is a manual way to un ban the device.
if any one can give me at least leads.