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47 free troubleshooting labs · Networking, Linux, Windows Server, Microsoft 365

Learn to fix IT incidents – on a simulated system.

Faultory gives you a ticket, a network and a console. Find out what is broken and fix it – just like it happens in real operations.

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Interactive labs
47
Commands & cmdlets
150+
Learning mode
hands-on
WS-042 — PowerShellTicket #4711
PS C:\Windows\system32> nslookup example.com
DNS request timed out.
    timeout was 2 seconds.
*** Request to UnKnown timed-out
PS C:\Windows\system32> ipconfig /all | findstr DNS
   DNS Servers . . . . . . . . . . . : 192.168.10.99
PS C:\Windows\system32> Set-DnsClientServerAddress -InterfaceAlias Ethernet -ServerAddresses 192.168.10.10
PS C:\Windows\system32> nslookup example.com
Server:  dns01.firma.local
Address:  192.168.10.10
Non-authoritative answer:
Name:    example.com
Address:  93.184.215.14

Features

A simulation that behaves like real infrastructure.

Logically connected networks

Routers, firewalls, DNS and DHCP servers form one coherent system. Every change affects all subsequent commands.

Linux and PowerShell terminals

ping, dig, ip route, iptables, systemctl, Test-NetConnection, Get-ADUser, gpresult, Get-SmbShareAccess, Get-MessageTrace, Get-MgUser and many more – with realistic output.

Diagnosis instead of multiple choice

Nobody tells you the cause. You collect evidence, narrow it down and prove your hypothesis.

The system state is what gets graded

Faultory checks in the simulated network whether your fix works – no magic words, no template. Every correct approach counts.

Transparent feedback

Points for methodical work, efficiency and independence – with a clear reason for every deduction.

Secure by design

Input is never executed on a host. The simulation interprets a defined command set.

How it works

From ticket to solution in three steps.

  1. 01

    Read the ticket

    A user reports a problem. You get the topology, the network plan and access to the devices.

  2. 02

    Diagnose

    Test reachability, name resolution, routes and services. Narrow down the cause step by step.

  3. 03

    Fix & verify

    Correct the configuration. Faultory verifies the target state and grades your approach.

Scenarios

47 classics from everyday IT operations.

Real troubleshooting simulations instead of multiple choice – for learners, training companies and IT teams. All labs are freely available after free registration, even without a school or course.

View all 47 labs

Networking & Linux

DNS, DHCP, routing, subnetting, firewalls, systemd services and configuration files.

Windows Server & Active Directory

Locked accounts, group policies, AD DNS, share and NTFS permissions, service dependencies.

Microsoft 365 & cloud

Exchange Online, Intune, Entra ID Conditional Access, licensing and PowerShell automation.

DNS & name resolutionBeginner

Hostnames are not resolving

A workstation reaches servers by IP address but not by hostname. Find out why name resolution fails.

~10 min

Routing & gatewaysBeginner

No access to other subnets

A workstation reaches devices in its own network, but neither the server network nor the internet.

~12 min

DNS & name resolutionBeginner

Git server unreachable from just one computer

Everyone reaches the new Git server – except DEV02. DNS returns the correct address, yet the client connects to the wrong one.

~10 min

Linux servers & servicesBeginner

Customer portal offline after maintenance window

After the nightly reboot the customer portal is no longer reachable. The server answers ping, but not HTTP.

~8 min

Windows Server & Active DirectoryBeginner

Employee can no longer sign in

An account keeps getting locked even though the user enters her password correctly. Find the source of the failed attempts and unlock the account.

~10 min

Microsoft 365 & cloudBeginner

Exchange Online: emails do not arrive in the mailbox

An employee has not received any emails for days – neither internal nor external. The senders do not get an error message.

~10 min

For schools & teams

Assign tasks, track progress, build your own scenarios.

Instructors assign labs to participants and see results at a glance. Administrators manage users, roles and categories and publish new scenarios.

  • Roles for administrators, instructors and students – enforced on the server
  • Assignments with due dates and status per participant
  • Transparent grading with a points breakdown
  • Scenario editor with validation of the lab environment

Ready for your first ticket?

Sign up and solve “Hostnames are not resolving” in about ten minutes.

Get started Try a lab now – no sign-up