Explore / Technologies

IT Technologies

Access BAOI tools, diagnostics and resources from the technology you use.

Fortinet / Network Security FortiGate

Tools, diagnostics, commands and resources for administering and troubleshooting FortiGate firewalls and FortiOS.

FortiOSIPsec VPNSSL VPNSD-WAN

Explore → Microsoft / Identity Active Directory

Active Directory resources for domain controllers, AD DNS, GPO, Kerberos, replication, accounts and certificates.

AD DNSGPOKerberosReplication

Explore → Microsoft / Infrastructure Windows Server

Windows Server diagnostics and administration for services, RDP, storage, VSS, Event IDs, PowerShell, certificates and updates.

PowerShellEvent IDRDPVSS

Explore → Microsoft Cloud Microsoft 365

Microsoft 365 administration and troubleshooting for Entra ID, Exchange Online, Intune, OneDrive, SharePoint, MFA and email.

Entra IDExchange OnlineIntuneOneDrive

Explore → Virtualization / VMware VMware

VMware resources for ESXi, vCenter, vSphere, VMDK, snapshots, datastores, shared storage, HA and vMotion.

ESXivCenterVMDKSnapshot

Explore → Network / Infrastructure IT Networking

Tools and methods for DNS, DHCP, VLANs, routing, Wi-Fi, switching, TCP/IP, latency, MTU and network diagnostics.

DNSDHCPVLANTCP/IP

Explore → Backup / Continuity Backup & Disaster Recovery

Backup, restore and disaster recovery resources for Veeam, Acronis, VSS, RPO, RTO, immutability, replication and restore testing.

VeeamAcronisVSSRPO

Explore → IP Telephony / SIP 3CX & VoIP

3CX and VoIP troubleshooting for SIP trunks, DECT, SBC, NAT, RTP, audio quality, certificates, phones and backups.

3CXSIPDECTSBC

Explore → Security / Defense Cybersecurity

Defensive resources for phishing, ransomware, compromised accounts, MFA, hardening, firewalls, incidents and backup protection.

PhishingRansomwareMFAMalware

Explore → Web / WordPress WordPress

WordPress guides and diagnostics for critical errors, plugins, themes, SMTP, permalinks, PHP, security and performance.

Error 500PluginsSMTPPermalinks

Explore → Linux / Administration Linux

Linux commands, diagnostics and resources for Debian, Ubuntu, Bash, systemd, SSH, files, networking, logs and backups.

DebianUbuntuBashsystemd

Explore → Virtualization / Linux Proxmox VE

Proxmox VE administration and troubleshooting for QEMU VMs, LXC containers, clusters, Ceph, storage, backups, migration and networking.

PVEQEMULXCCluster

Explore → Microsoft / Virtualization Hyper-V

Hyper-V administration and troubleshooting for virtual machines, VHDX, checkpoints, vSwitch, Live Migration, replication, Failover Clustering and CSV storage.

VHDXCheckpointsvSwitchLive Migration

Explore → Storage / Infrastructure Storage / NAS / SAN

Enterprise storage resources for RAID, SMART, NAS, SMB/NFS, iSCSI, MPIO, LUNs, SAN, ZFS, LVM, snapshots, capacity and performance.

RAIDSMARTNASSAN

Explore → Data / SQL SQL / Databases

SQL Server, MySQL, MariaDB and PostgreSQL administration and troubleshooting for connections, performance, blocking, backups, logs and storage.

SQL ServerMySQLPostgreSQLDeadlocks

Explore → Peripherals / Network Printers / Scanning / SMB

Troubleshooting for printers, print servers, SMB scan-to-folder, SMTP scan-to-email, drivers, WSD, TWAIN and WIA.

SpoolerDriversSMBScan to folder

Explore → Microsoft / Endpoint Windows 11 / Endpoint

Windows 11 troubleshooting for performance, Windows Update, BSOD, startup, profiles, BitLocker, drivers, networking, OneDrive and system repair.

Windows UpdateBSODBitLockerDrivers

Explore → Microsoft Cloud / Identity Azure / Entra / Intune

Azure, Entra ID and Intune administration and troubleshooting for MFA, Conditional Access, devices, synchronization, compliance, Autopilot, RBAC and Azure networking.

Entra IDIntuneMFAConditional Access

Explore →

Explore IT technologies

BAOI IT Technologies is the learning entry point for understanding the technologies behind day-to-day administration and troubleshooting. Use it to move from a concept to the related diagnostic, guide, procedure or practical tool.

A practical learning path

Start with the technology family involved in the incident: networking, identity, systems, cloud, security, virtualization, storage, web or communications.
Read the core concept and identify the protocol, component boundaries and normal data flow before changing configuration.
Open the matching BAOI guide or troubleshooting page to translate the concept into observable checks.
Use procedures and tools for execution, then record the result so the same diagnosis can be repeated by another technician.

How to use the knowledge operationally

A useful technology note should let you explain the normal path, name the failure boundary and choose the next diagnostic test without relying on trial-and-error changes.

Build reusable technical evidence

For each topic, keep the terminology, relevant ports/protocols, architecture diagram or flow, expected healthy state and links to the operational runbook.

Frequently asked question

Where should I start if I only know the symptom?

Start from BAOI Diagnose or Problems & Symptoms, then follow the identified technology family back to IT Technologies when you need the underlying concept.

Related BAOI resources: IT tools · procedures · IT dictionary.