Category: Security
Category: Security
Section titled “Category: Security”5 posts
Use related tags below to narrow down implementation-level topics.
Related tags
- Linux (5)
- System Administration (4)
- Firewall (2)
- Network Security (2)
- SSH (2)
- Chmod (1)
- Chown (1)
- File Ownership (1)
- Build a Minimal Packet Filter with nftables This guide explains how to build a minimal packet filter using nftables tables, chains, rules, counters, and persistence, and how to manage and verify it safely, including avoiding concurrent management with firewalld.
- Secure Initial Configuration of a Linux OpenSSH Server This guide explains how to improve the security of OpenSSH Server on Linux step by step by checking sshd_config, restricting root login, disabling password authentication, configuring AllowUsers, and reloading the configuration without losing access.
- Practical Guide to firewalld Zones, Services, and Rich Rules This guide explains how to safely modify and verify a Linux firewall with firewalld without disrupting connectivity, while checking runtime/permanent settings, zones, services, source restrictions, and rich rules on an actual system.
- Complete Guide to Linux File Ownership and Permission Design This guide systematically covers Linux file owners, groups, permissions, umask, and special bits, with practical explanations of how to design secure access rights and troubleshoot permission problems.
- SSH Public Key Authentication Client Setup (Windows/Linux) Step-by-step guide on how to configure SSH public key authentication on the client side for Windows and Linux systems.