It’s possible to update a RFLink gateway from your Pi running Raspbian and Domoticz.
Monitor an external IP device by using ICMP request from a zabbix agent.
IPsec XAuth VPN server for native usage on Raspberry Pi, Windows or Linux clients.
How to monitor a device behind a NAT using active checks with Zabbix.
Update a domoticz sensor using a Wemos D1 and a seed light sensor.