Hello
What would be good way to alert on condition when some node suddenly starts responding to ping or to tcp port for example and normal status would be down. Usually monitoring it other way around.
Egert
If you have it a s a node in NetXMS, then server will generate usual SYS_NODE_UP event. All you have to do is to create rule which somehow will filter SYS_NODE_UP eents only for such nodes. It could be filter script that check container membership or certain custom attribute.
Best regards,
Victor