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[HowTo] Install Coreboot and disable Intel ME on Lenovo Thinkpad X230

I have been promising to myself for very long time that one day I had to have a computer as much privacy focused as possible. As I cannot afford to buy a Purism laptop, I thought the best approach was to find some device where at least it was possible to disable Intel ME and […]

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[How To] Monero (XMR) Wallet with Trezor Model T

Recently the GitHub user ph4r05 released some commits for the Monero wallet GUI that enabled the use of Trezor Model T with the Monero cryptocurrency (XMR). As the commits are now merged in the main Github repository of Monero but not yet “frozen” in a stable release I decided to publish this small guide that […]

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[SysAdmin] Create isolated WiFi network on OPNSense with local wireless interface

During the last months I am using OPNSense as my firewall (moving away from PFSense). At the very beginning I was using it on an apu2d board but then I decide to try running it in a kind of NFV way. Now I am indeed running OPNSense as a virtual machine (with KVM as hypervisor […]

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Configure OpenVSwitch and libvirt to enable trunking (802.1q) between KVM Guests

The goal of this article is to cover a complete configuration of OpenVSwitch and KVM networking to have ports of the virtual switch allowing trunking toward the KVM guests. The reason to do that is to give the opportunity to arrange topologies between routers running as KVM guests connected using trunks instead of physical (virtual) […]

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GNS3 - RIP and RIPng TCP/IP Volume 1 Topology

[Networking Lab] RIP and RIPng configuration exercise (TCP/IP Volume 1)

Hi there! Yet another GNS3 laboratory for a bit of practice. This time I arranged the starting configuration to play with RIP and RIPng following the exercise found on TCP/IP Volume 1, Chapter 6. As always, let me provide you with the topology picture: This time the picture is also showing what are the configurations […]

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[Networking] Select a mask so that there will be a specific number of subnets and hosts available

This is mainly a reminder for myself and for who is working with subnetting and with the always arising question about how to work with subnets design. The question to answer today is: you are given a network and you are asked to find a netmask so that you will have a defined number of […]

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