IÂ´m trying to monitorize a network with 10 servers with plesk, some in windows and most with linux. I tried to install cacti but I canÂ´t see any other machine in the network, I hear about nagios but I donÂ´t know exactly how to install it. anyone know something about these programs? can you recomend me some other programs? ps: can nagios or cacti be use to monotorize exactly ports, like port 80 in the port 12 of a switch. excuse me about my english.