CRC – Cyclic Redundancy Check

Cyclic Redundancy Check (CRC) is a widely used error-detecting code that helps ensure the integrity of data during transmission or storage. It is a crucial concept in networking and data communication, making it essential for new IT students to understand how it works and its applications. What is CRC? CRC is a method used to Read More …

Covert Recruitment

Information security, traditionally focused on technical defenses against digital intrusions, is increasingly grappling with threats that exploit human vulnerabilities, particularly in intelligence gathering and economic espionage. Modern adversaries are employing sophisticated social engineering tactics that leverage personal circumstances to gain access to sensitive information. A recent Reuters report highlights a concerning development: a secretive Chinese Read More …

Hacker TV – GoFetch

This video demonstrates how GoFetch utilizes Bloodhound attack graph data to automatically pivot from an exploited host to the domain controller.  The demonstration begins in Bloodhound, where the presenter identifies the attack path to the domain controller. After finding a path, the graph is exported for use by the attack script. The presenter then launches GoFetch Read More …

smbclient test for 445

While smbclient is primarily used for interacting with SMB shares (like listing shares or accessing files),, it can implicitly indicate if port 445 is open and accessible. If smbclient can successfully connect to an SMB share on a target system, it means port 445 is open on that system and allowing connections. How it works: When you use smbclient Read More …

FCS – Frame Check Sequence

A Frame Check Sequence (FCS) is an essential component in data communication protocols, serving as a method for error detection. It is a sequence of bits added to the end of a data frame, which allows the receiving device to verify the integrity of the data it has received. Understanding FCS is crucial for new Read More …

Notes :: Kubernetes

 Key topics include: Traditional vs. Kubernetes Challenges: Comparing the challenges of managing applications in traditional virtual machine environments versus containerized Kubernetes environments. Kubernetes Fundamentals: Defining Kubernetes, its origins, why it’s used, and key concepts like cluster architecture, API server, nodes, pods, and network policies. Kubernetes Security Fundamentals: Discussing control plane and data plane protection, including API protection, encryption, Read More …

Docker GPU Access

Docker containers can effectively allow access to the GPU, particularly through the use of the NVIDIA Container Toolkit, which enables Docker to communicate with NVIDIA GPUs.  This setup is essential for workloads such as AI/ML, deep learning, and data processing that require GPU acceleration to enhance performance.  To enable GPU acceleration, your machine needs a Read More …

VPC – Virtual Private Cloud

A Virtual Private Cloud (VPC) in Amazon Web Services (AWS) is a logically isolated section of the AWS cloud where users can define and control a virtualized network environment. VPCs enable users to launch AWS resources, such as Amazon EC2 instances, within a virtual network that they define, providing enhanced security and control over their Read More …