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Course Introduction：This guide demonstrates how to configure a multi-server CrowdSec Security Engine, enhancing your network's collective security. One server acts as the parent (server-1), receiving alerts from child Log Processors (server-2 and server-3). This archit

2025-03-09 comment 0  385

Course Introduction：Bolstering Ubuntu Server Security: A Comprehensive Guide Ubuntu Server, a globally popular open-source operating system, powers countless infrastructures. Its efficiency and ease of use make it a favorite, but like any system, it's vulnerable to sec

2025-03-14 comment 0  422

Course Introduction：The second part of this tutorial will explain how to set up and secure the installation of the multi-server CrowdSec security engine. In the first part, we explain how to set up the CrowdSec security engine on multiple servers, one of which serves as the parent server and the other two forward the alert to it. This section will solve the security issues caused by plaintext HTTP communication in previous multi-server security engine installations. To solve this problem, we recommend establishing communication between security engines through encrypted channels. This solution allows server 2 or server 3 to trust the identity of server 1 and avoid man-in-the-middle attacks. Use a self-signed certificate Creating a Certificate First, you need to create a certificate. This can be achieved by the following single line command: open

2025-03-10 comment 0  422

Course Introduction：Security settings at the SQLServer instance level are crucial, and protection should be strengthened from four aspects: login account, server role, network protocol and audit mechanism. 1. Manage login accounts: Follow the principle of minimum permissions, disable or delete unnecessary accounts (such as SA), avoid using SA account for daily operations, and restrict remote login. 2. Configure server roles: Assign appropriate server roles according to responsibilities, such as securityadmin and serveradmin, avoid abuse of sysadmin roles, and regularly review role members. 3. Strengthen network and protocol security: enable SSL/TLS encrypted connections, restrict IP access, and close unnecessary protocols (such as NamedPipes). 4. Audit and logging:

2025-08-06 comment 0  810

Course Introduction：To use SQLServerAudit for security auditing, the core step is to configure audit policies and analyze audit logs. 1. Configure audit policy: First create a server audit object, select an audit target (such as file, Windows event log), set an audit level (server or database level), and remember to enable audit; for example, use CREATESERVERAUDIT to create an audit and bind it to a file path, and then specify monitoring events through the server or database audit specifications. 2. Audit events are recommended to pay attention to: login failure (FAILED_LOGIN_GROUP), permission change (SCHEMA_OBJECT_PERMISSION_CHANGE_GROUP), sensitive number

2025-07-20 comment 0  385

Course Elementary  13826

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

Course Elementary  82366

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

Course Elementary  13184

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

Course Elementary  24632

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Course Elementary  27491

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.