Series/groups of articles

Managing a corporate computer network using Microsoft OS usually means managing Active Directory Domain Services (AD DS). It is a very extensive group of technologies, protocols and services. The basis is directory services, authentication and the LDAP communication protocol.

Articles related to user and device identity (not only) in Microsoft Entra ID. Different login and authentication options. Areas such as modern authentication, multi-factor authentication, password-less login, etc. Often involving the use of FIDO Authentication, for example using the FIDO2 security key or Windows Hello for Business.

Various popular topics regarding the public cloud. More focused on Microsoft services, i.e. IaaS, PaaS, SaaS Azure, Entra ID directory services (formerly Azure AD) and hosted Microsoft 365 / Office 365 services.

Articles dedicated to backup (Backup), replication (Replication) and restoration (Restore) of data. That is, data protection (Data Protection) using backup copies and recovery after a crash (Disaster Recovery).

I wrote this series for Connect magazine. It contains most of the same information as my older series Computer networks, but it is written in a slightly different way. Computer network technologies are first briefly summarized and then discussed in a little more detail from the lowest layers up.

A large series about the operating system of Cisco's active elements. It contains some of the most read articles on this site. The articles describe the configuration of switches and routers, primarily with Cisco IOS. Things about ports, VLANs, STP, ACLs, QoS, etc.

Articles on Cisco's newer active element operating system, NX-OS. It is used on Nexus Series Ethernet switches and MDS Fibre Channel switches.

Cisco UC category articles describe Cisco IP telephony in general. The main focus is on the Cisco Unified Communications Manager (CUCM) PBX. Another category focuses on UCCX.

The Wireless LAN Controller is a Cisco device for central management of WiFi networks (access points). The articles describe the function and configuration of Cisco wireless networks. From Access Points (i.e. access points), to WLC, Wireless Control System (WCS) and Cisco Prime Infrastructure.

This series covers the basics of computer networking. Important practical aspects that everyone interested in networking should know are briefly described. It contains some of the most widely read articles on this site. It is used for teaching in schools.

Data storage is a vast and complex issue in the computer world. Here you will find articles dedicated to Storage Area Networks (SAN), iSCSI technologies, Fiber Channel, disk arrays (Storage System, Disk Srray) and data storage and storage in general.

SMTP protocol and its features. Protection of electronic mail against SPAM and Phishing. Encryption of mail...

Articles related to Extreme Networks networking features, including ExtremeCloud IQ cloud management.

FIDO authentication is based on the FIDO2 standard (WebAuthn and CTAP2). It brings a more secure option to log in to online services. It belongs to Passwordless MFA (multi-factor authentication without a password). At the same time, it increases the convenience of users (it supports the use of biometrics). These are, for example, Windows Hello for Business, FIDO2 security key and generally passkeys (access keys).

Fortinet security solutions. Mostly focused on the Next Generation Firewall (NGFW) FortiGate. Configuration of FW, policies, NAT, but also VPN and authentication options. Marginally working with logs using FortiAnalyzer and with clients using FortiClient EMS.

Group Policy is definitely the basis for central management of computers in a domain. With them we can control the settings, security and behaviour of workstations and servers.

Authentication protocol that is widely used (not only) by Microsoft. The articles focus on single sign-on (SSO), in practice it is very much about using Microsoft Active Directory Domain Services.

A new series that deals in detail with the Kerberos V5 protocol, mainly in the Microsoft Active Directory environment. It also describes a number of related things that are needed to understand how Kerberos Single Sign-On (SSO) works.

Multi-line connection. EtherChannel, Link Aggregation, PAgP, LACP, NIC Teaming, Bonding, Bundling ...

Almost since the beginning of my practice, I have been involved in the administration of the Microsoft mail server, i.e. Exchange Server. I started with the 2003 version and worked my way up to Exchange Online. The articles cover many areas of management. Most since the migration to Exchange Server 2016 and its complete configuration. But also Exchange Hybrid and e-mail security.

Cloud solution for managing corporate and private devices with different operating systems. It supports Mobile Device Management (MDM) and Mobile Application Management (MAM). Allows management (access) of users, devices and applications.

Articles that relate to NetApp E-Series disk arrays running SANtricity OS.

Articles that relate to NetApp All Flash FAS (AFF) and Fabric-Attached Storage (FAS) disk arrays with the ONTAP operating system.

Introduction to computer network monitoring and description of basic protocols.

Articles related to Microsoft's PowerShell scripting language, which is used in all new versions of MS OS and applications.

This series of articles is devoted to the comprehensive issue of quality assurance in data transmission, i.e. Quality of Service. Everything is addressed taking into account the current trends used on Cisco active elements, along with configuration examples.

Security tools. Primarily Firewall and the like.

Simple Network Management Protocol (SNMP) is very useful for managing a computer network.

The Secure Sockets Layer protocol and its successor, Transport Layer Security, are widely used on the Internet to secure the communication of another protocol (such as HTTPS, SMTPS, XMPP) using encryption.

Articles that focus on Veeam Software's backup solution. It is a platform for Backup, Replication and Restore. In other words, a Data Protection and Disaster Recovery solution.

Articles from popular topics about virtualization of servers and workstations.

A series of articles that provides a general description of VPN technology. It breaks down individual VPN types such as Site to Site VPN and Remote Access VPN. And it describes configurations on different devices.

Articles dedicated to Microsoft operating systems, both client and server.

Different ways to get the image from the device to the display surface without using cables.