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Stay Ahead With Linux Security HOWTOs

Logging Hero Image Esm H350
How to Learn Tips and TricksPrice Tag%201incident response system monitoring

A Linux server can be fully patched, hardened, and compliant, yet still leave investigators unable to explain how an attacker got in. Without reliable Linux logging, even a well-secured system can become impossible to investigate. . Hardening defines what a system should allow, but logs reveal what actually happened. When visibility is incomplete, security teams lose the evidence they need to detect attacks, understand their scope, and determine how they unfolded. Why Linux Logging Must Come...
1 min read How to Learn Tips and Tricks
How To Investigate Suspicious Outbound Network Hero Esm H350
How to Secure My NetworkPrice Tag%201incident response network traffic

Imagine logging into a production Linux server for routine maintenance and noticing background network activity connecting to an unfamiliar external IP address. Your endpoint protection agent is not popping up with an alert, there is no service failure, and on the surface, the system appears to be running normally. . For Linux administrators and security teams, such a situation is a moment of truth: Is this activity a sign of active intrusion or just a tool that was overlooked in the course of...
4 - 7 min read How to Secure My Network
Apply Least Privilege In Linux Hero Esm H350
How to Harden My FilesystemPrice Tag%201system hardening open source security

We all spend a lot of time defending our systems from external threats, but the amount of damage an attacker can cause often depends on what happens after they get in. A single compromised account doesn't always lead to a major incident. The real danger begins when that account has far more access than it actually needs. . That's exactly what the principle of least privilege is designed to prevent. By limiting users, services, and applications to only the permissions required for their jobs,...
6 - 12 min read How to Harden My Filesystem
Correlate Linux Logs For Faster Threat Detection Esm H350
How to Learn Tips and TricksPrice Tag%201threat detection system monitoring

For small security and IT teams, the "enterprise" dream of a fully automated SIEM often feels like a distant luxury. It’s a vision built on massive budgets and dedicated engineering teams—things that, frankly, most of us don't have. But here is the reality: you don’t need a six-figure platform to maintain a secure environment. . Linux systems are, by design, incredibly verbose. Every time a user authenticates, a process executes, or a configuration file changes, your system creates a record of...
5 - 9 min read How to Learn Tips and Tricks
Centralize Logs With Journald And Rsyslong Hero Esm H350
How to Learn Tips and TricksPrice Tag%201network security centralized logging

Linux systems generate a steady stream of authentication, service, kernel, and application logs. On most systems, those logs never leave the machine that created them. If you're responsible for ten or twenty servers, that means checking each one separately. If one disappears before you can investigate it, its logs may disappear with it. Centralized logging solves that by sending log messages to another server as they're created. Instead of searching every machine, you have one place to review...
3 - 6 min read How to Learn Tips and Tricks
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[{"id":506,"title":"Yes \u2014 critical security patches should install automatically.","votes":0,"type":"x","order":1,"pct":0,"resources":[]},{"id":507,"title":"No \u2014 every update should be tested before deployment.","votes":3,"type":"x","order":2,"pct":75,"resources":[]},{"id":508,"title":"Only critical vulnerabilities should auto-install.","votes":0,"type":"x","order":3,"pct":0,"resources":[]},{"id":509,"title":"I patch when Reddit starts panicking.","votes":1,"type":"x","order":4,"pct":25,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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Code Development Programming Esm H240
Price Tag%201software designmodularityprogramming

Exploring Object-Oriented Programming Concepts in Python

In my previous article, I explained how to make Python modular by using functions, creating modules, or both. Functions are invaluable to avoid repeating code you intend to use several times, and modules ensure that you can use your code across different projects. But there's another component to modularity: the class. . If you've heard the term object-oriented programming, then you may have some notion of the purpose classes serve. Programmers tend to consider a class as a virtual object, sometimes with a direct correlation to something in the physical world, and other times as a manifestation of some programming concept. Either way, the idea is that you can create a class when you want to create "objects" within a program for you or other parts of the program to interact with. The link for this article located at Opensource.com is no longer available. . If you've heard the term object-oriented programming, then you may have some notion of the purpose c. previous, article, explained, python, modular, using, functions, creating, modules. . Brittany Day

Calendar%202 Jul 08, 2019 •User Avatar Brittany Day How to Learn Tips and Tricks
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Should Linux servers automatically install security updates?

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[{"id":506,"title":"Yes \u2014 critical security patches should install automatically.","votes":0,"type":"x","order":1,"pct":0,"resources":[]},{"id":507,"title":"No \u2014 every update should be tested before deployment.","votes":3,"type":"x","order":2,"pct":75,"resources":[]},{"id":508,"title":"Only critical vulnerabilities should auto-install.","votes":0,"type":"x","order":3,"pct":0,"resources":[]},{"id":509,"title":"I patch when Reddit starts panicking.","votes":1,"type":"x","order":4,"pct":25,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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