Tag: security

Our 2023 Recommended Summer Reads 2023 FreeBSD and Linux

Embrace the power of FreeBSD! 🌞📚 Unleash its potential with our captivating summer collection. Optimize performance, boost security, and expand your tech horizons. Level up your skills as you sip on your summer cocktail or simply take a break from a heavy year.

FreeBSD – Linux and FreeBSD Firewalls – Part 2

In the first article of this series, we covered the major differences between two types of firewalls platforms – either Linux or FreeBSD based and what the options are. In the second part, we go a bit deeper and discuss how egress filtering is done, and how tables and sets are built. Read more about it in our second write-up.

FreeBSD – Linux and FreeBSD Firewalls – Part 1

Choosing the right firewall for your operating system can be daunting, especially with the variety of options available for Linux and FreeBSD. In this article, we’ll explore four of the most widely used firewalls—iptables, nftables, ipfw, and pf—offering insights to help you decide which one is best suited for your needs.

Sysadmin Series – How to Catch a Bitcoin Miner

What first looked like some CPU oddity in a monitoring graph became a full-fledged hunt for a bitcoin miner. Figuring out what happened and how they were operating is part of the investigation. Collecting evidence to make a case soon became akin to a detective story.

OpenZFS – Data Security vs. Integrity

Data security is about preventing data from being disclosed, ensuring that only the correct people can access it. Data integrity ensures the data is correct, that it has not become corrupt due to hardware failure or other issues. With ZFS, you can get both.

Improving Replication Security With OpenZFS Delegation

OpenZFS privilege delegation is an extremely powerful tool that enables system administrators to carefully provide unprivileged users the ability to manage ZFS datasets and zvols at an extremely precise level —with much finer control than would be possible with generic security tools like sudo or doas.

The FreeBSD Boot Process

Let’s talk about the FreeBSD boot process. It is very robust and complex, as it is well-thought. Find out what are the differences when you boot from UEFI or legacy BIOS, or from GPT and MBR partitioning schemes. Learn what happens when you use ZFS or UFS filesystem.

Using FreeBSD’s pkg audit to Investigate Known Security Issues

Keeping systems secure and free of any vulnerabilities is an important task in any sysadmin’s or developer’s book. Fortunately, FreeBSD systems come with several tools to accomplish that task for both its Base System and installed 3rd party packages.
In this article, we will take a look at how these tools can help us efficiently manage security vulnerabilities in our FreeBSD systems