A-Team Systems, Author at A-Team Systems

CUPS Vulnerabilities Underscore the Need for Proper System Configuration Beyond Edge Security

Monday, October 14, 2024

Recent vulnerabilities identified in the Common Unix Printing System (CUPS), specifically CVE-2024-47076, CVE-2024-47175, CVE-2024-47176, and CVE-2024-47177, highlight the importance of not just securing the network perimeter but also ensuring proper system configuration. While edge security measures such as firewalls and intrusion detection systems (IDS) are crucial in protecting Linux servers from external threats, they are… Read more »

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CUPS, Linux, networking, printing, security

Zero Trust Architecture for Linux: A New Era of Security for Modern Infrastructure

Wednesday, September 4, 2024

The security paradigm is shifting as organizations increasingly adopt cloud, containerization, and microservices architectures. Traditional security models, which rely on a strong perimeter to protect the internal network, are becoming obsolete. In this new digital era, where workloads and users operate from anywhere, security must move closer to the workload. This is where Zero Trust… Read more »

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The Inevitability of Cybersecurity Breaches: A Reflection on the XZ/LibLZMA Vulnerability

Thursday, April 4, 2024

The recent revelation of a significant vulnerability within xz’s liblzma library has brought to light a critical truth in cybersecurity: It’s not a matter of if a security breach will occur, but when. This incident serves as a poignant reminder that, despite rigorous security measures and proactive risk management strategies, vulnerabilities can and will be discovered within the… Read more »

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cloud servers, Linux, security

The Rising Tide of Cyber Crime Targeting Small Businesses

Friday, March 22, 2024

Cybersecurity has become a paramount concern for organizations worldwide. As larger enterprises have fortified their defenses against cyber threats, small businesses have emerged as more vulnerable targets for cybercriminals. This shift is primarily due to the limited resources small businesses can allocate to cybersecurity measures compared to their larger counterparts. The implications of this trend… Read more »

Using tcpdump and Wireshark – Linux & FreeBSD Network Capture and Analysis Guide

Tuesday, March 5, 2024

Network Capture and Analysis Guide A common go-to when troubleshooting network issues is to use a packet sniffer. However running Wireshark directly on a headless server with no GUI, potentially hundreds or thousands of miles away, presents problems. The good news is you can create pcap files with tcpdump which you can then download to… Read more »

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Gitlab Project Access Token “You are not allowed to download code from this project.”

Thursday, January 11, 2024

We ran into an issue where a Gitlab Project Access Token simply would not work when trying to clone a repository it definitely had permission to, it would report this error: You are not allowed to download code from this project. It turns out that Project Access Tokens in a private repository will not work… Read more »

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Understanding NginX’s sendfile Parameter and Its Implications with NFS

Tuesday, November 7, 2023

In the world of web servers, NginX has emerged as a robust, high-performance option, powering some of the most trafficked sites on the internet. It’s praised for its scalability and its myriad of features, which allow for fine-tuned optimization. One such feature is the sendfile directive, a parameter within NginX’s configuration that can significantly affect… Read more »

ZFS failed to read pad2 area of primary vdev

Friday, September 8, 2023

There are number of issues that can lead to this error when trying to boot a FreeBSD server with ZFS as root / zroot: ZFS failed to read pad2 area of primary vdev There can be a few reasons for this error, but check these in order: “Phantom” Pool: Make sure you haven’t added any… Read more »

Zabbix Ubuntu: zabbix-agent : Depends: libssl1.1 (>= 1.1.1) but 1.1.0g-2ubuntu4 is to be installed

Wednesday, August 2, 2023

If you’re ever tried to install the Zabbix agent on a Linux server and gotten an error like this, you’re in the right place to find help: $ apt install zabbix-agent Reading package lists… Done Building dependency tree Reading state information… Done Some packages could not be installed. This may mean that you have requested… Read more »

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Linux, monitoring, Ubuntu, Zabbix

What is CPU Steal Time Under Linux, How To Measure it, And How To Keep Your Cloud Provider Honest!

Monday, July 10, 2023

What is CPU Steal Time? In Linux, CPU steal time refers to the amount of time a virtual CPU waits for a real CPU while the hypervisor is servicing another virtual processor. This measurement is often seen in virtualized environments like AWS, Azure, or Google Cloud. In simpler terms, ‘steal time’ is time that a… Read more »

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Linux, monitoring, Performance