#CentOS/RHEL 7:
rpm -Uvh http://repo.zabbix.com/zabbix/3.0/rhel/7/x86_64/zabbix-release-3.0-1.el7.noarch.rpm

# CentOS/RHEL 6:
rpm -Uvh http://repo.zabbix.com/zabbix/3.0/rhel/6/x86_64/zabbix-release-3.0-1.el6.noarch.rpm

#CentOS/RHEL 5:
rpm -Uvh http://repo.zabbix.com/zabbix/3.0/rhel/5/x86_64/zabbix-release-3.0-1.el5.noarch.rpm

Доустановить пакеты:

apt-get install zabbix-get zabbix-sender

on Windows OS

Установка службы

zabbix_agentd.exe --config "C:\Program Files\Zabbix Agent\zabbix_agentd.conf" --install

Firewall
Выполнять от Администратора:

Netsh Advfirewall Firewall Add Rule name="Zabbix Agent" description="Zabbix Agent" profile=any localport=10050 protocol=tcp dir=in action=allow

Минимальный конфиг

# file: C:\Program Files\Zabbix Agent\zabbix_agentd.conf

LogFile=C:\Program Files\Zabbix Agent\Zabbix_agentd.log

DebugLevel=3

Timeout=10

EnableRemoteCommands=1

Server=zabbix

ListenPort=10050

ServerActive=zabbix

Hostname=!УКАЗАТЬ_ИМЯ!

#UserParameter=system.test,echo 1