Zabbix is a network monitoring solution. I used to play with Nagios but I find Zabbix a better product. Simpler to install, easier to use, better web interface.
Zabbix works in a client/server mode. Client is called an agent 
so on each box you want monitored you install the agent. The server gets installed either with mysql or with postgresql database support. I opted for mysql. The install was done on my laptop Ubuntu. I had some problems early on since my server didn’t see my client.
This was because of the server or client settings that I changed. Since installing both products I noticed a lot of forks/threads in the process list and I wanted to cut down the number of those by editing a config file.
Don’t do that, Zabbix doesn’t like that
Now I got 25 Zabbix instances in my process list
root@warlock:/tmp# ps aux|grep zabbix|grep -v grep|wc -l
25
Anyway, Zabbix looks nice. I can monitor everything related to how my box functions. I had to clone 2 eth0 rules (incoming and outgoing) and make it work for my wireless network. I just changed eth0 to ath0 both times after cloning.
I have to figure out how to send daily reports to my email 