Resources
Resources for teams responsible for critical systems
Technical articles, company updates, security commentary, and longer-lived infrastructure perspective from A-Team Systems.
A-Team Systems publishes practical technical references, public company updates, and longer-lived infrastructure perspective for people working around Linux and FreeBSD systems.
Resource areas
Choose the resource path that matches what you need.
Tech Blog
Use the Tech Blog for practical technical references, troubleshooting notes, and guides from Linux and FreeBSD systems work.
Visit the Tech BlogNews & Press
Use News & Press for company updates, public announcements, certification notes, community news, and security commentary.
View News & PressInfrastructure Perspective
Use Infrastructure Perspective for deeper thinking on system ownership, reliability, operational discipline, and long-term care.
Explore Infrastructure PerspectiveLatest Technical Articles
Recent practical notes from Linux, FreeBSD, networking, troubleshooting, and system maintenance.
SQLSTATE[HY000] [2002] Connection timed out: FreeBSD PF, CARP, and Intermittent MySQL TCP Failures
SQLSTATE[HY000] [2002] Connection timed out
A-Team Systems investigated a production issue where a PHP application intermittently reported this MySQL connection error:
Unfortunately, this error can mean a lot of different things. You can get it when the database engine is down, when a firewall rule is wrong, when routing is broken, when a cable or switch path is having trouble, or when something in the middle simply does not return the TCP handshake.
- FreeBSD
- PF
- CARP
- MySQL
- TCP
- firewall state
- production debugging
Using tcpdump and Wireshark: Linux and FreeBSD Network Capture and Analysis Guide
Capture network traffic on a headless Linux or FreeBSD server with tcpdump, save it as a pcap file, and review the results locally in Wireshark.
- Linux
- FreeBSD
- Networking
- Troubleshooting
- Security
GitLab Project Access Token “You are not allowed to download code from this project.”
We ran into an issue where a GitLab Project Access Token would not work when trying to clone a repository it had permission to access.
- GitLab
- access tokens
- source control
Understanding NginX’s sendfile Parameter and Its Implications with NFS
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...
- FreeBSD
- Linux
- NFS
- NginX
- Performance
- sendfile
- Web Server
Latest News & Press
Recent public updates, announcements, and security commentary.
A-Team Systems Launches Updated Website and Clearer Service Names
A-Team Systems has launched an updated website with clearer service naming to help customers and prospects better understand its production infrastructure support services.
A-Team Systems Monitoring Claude Mythos Preview and Project Glasswing
A-Team Systems is monitoring Anthropic's Claude Mythos Preview and Project Glasswing as AI-assisted vulnerability discovery changes the pace of software security work.
A-Team Systems Joins the Linux Foundation as a Silver Member
A-Team Systems has joined the Linux Foundation as a Silver Member, reflecting our continued support for open source software and the communities that maintain it.
CUPS Vulnerabilities Underscore the Need for Proper System Configuration Beyond Edge Security
Recent CUPS vulnerabilities are a reminder that perimeter security is not enough. Production Linux systems also need careful service configuration and removal of unnecessary attack surface.
Infrastructure Perspective
Guidance on ownership, reliability, operational responsibility, and the practices behind stable systems.
What "Managed" Actually Means in Infrastructure
What managed service does, and does not, mean for systems that still need clear ownership.
Read perspectiveWhy Smart Teams Still Have Fragile Production Systems
How capable teams can still end up with fragile systems when responsibility is spread too thin.
Read perspectiveDevOps Is Not Infrastructure Management
Why delivery workflows and long-term system care solve different problems.
Read perspectiveWho Actually Owns Production Operations?
Why critical systems need explicit ownership before something breaks.
Read perspectiveSecurity and Audits Reveal Operational Truth
Why audits often expose gaps in responsibility, documentation, and day-to-day system care.
Read perspectiveWhy LLMs Struggle With Production Infrastructure Without Context
Why infrastructure work depends on context, history, and operational judgment, not just syntax.
Read perspectiveNeed help with production Linux or FreeBSD infrastructure?
A-Team Systems provides engineer-led infrastructure management and support for organizations that rely on stable Linux and FreeBSD systems.
Contact A-Team Systems