We were working with a test system and disconnected it from the network. When we reconnected it several days later and tried to access it through the console, it was no longer in our device list and it did not automatically get added back in. We tried rebooting the system, but it did not help. We turned on the Windows firewall log, but do not see any traffic from the console being blocked. In the investigation, we determined that none of our devices show that they have been scanned in the last week. The agent systems in question reboot every night, plus we had tried to reboot the test system, so we thought the next step would be to reboot the server. This was done, and, now, we cannot connect from the console to the devices. I started capturing the traffic between the console and one of the devices from the console side, and I am seeing very minimal traffic. When I click on a device, I see a ping and a reply, but no other traffic. In the past, I have seen traffic over several ports like 9595 and 9535 trying to establish remote control capabilities. All LANDesk services are running on the console, and the same is true on the test system which is on site. There is no firewall between the devices and the console, except for the Windows Firewall on the devices.
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