LoRa Trough 8 Floors – Using 100 mA

My student Tatu Erkinjuntti sent LoRa radio transmissions. His device can send messages trough eight concrete floors with minimal power consumption. He is using ESP32 with an external LoRa module, programmed with Arduino IDE. Power consumption during transmission is just … Continue reading

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Military Cyber Department Visit & Challenge w48 Thu

Military Cyber Department visits my course. First, there will be a lecture on the cyber department and how to join it. After that, selected students can try their skills in the Cyber Challenge. The event is in Finnish, and aimed … Continue reading

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Configure Windows and Linux with Single Salt Module

If OS is Windows, the path is ‘C:\tero’. If OS is Linux, the path is ‘/tmp/tero’. You can use conditionals to create Salt modules that work in multiple operating systems.

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Automatically Provision Vagrant Virtual Machines as Salt Slaves

Create a new, fully configured virtual computer in less than a minute. Keep configuration in version control. Manage trough configuration management system.

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Use "PCnet-Fast III" Network Adapter in VirtualBox – Prevent virtualbox_e1000_0day Attack

Use “PCnet-Fast III” network adapter in VirtualBox to prevent guest-to-host attack. MorteNoir1 published a guest-to-host escape from Virtualbox as a zero day attack. He named it virtualbox_e1000_0day. It seems that you can easily protect against the attack by using a … Continue reading

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