sudo arena
New: AI Security Fundamentals

Learn hacking by doing the job.

Sudo teaches cybersecurity the way the work is done: see the concept, try it in a live lab, then use it on a realistic client engagement.

  • Visual lessonsAnimated, narrated scenes for every concept.
  • Hands-on labsA lab machine in your browser, nothing to install.
  • Real-world scenariosAttacks and incidents modelled on real cases.
  • Mission-basedClient tickets, a team lead and a final report.
Get startedExplore paths
Junior Penetration Tester · Network recon In progress
Path progressSample learner

Scanning a network

Chapter 2 of 4
  • 22ssh
  • 80http
  • 443https
  • 3306mysql
Auto tour · click a step
Our curriculum
Career paths
31Each ends in a capstone project
Skill paths
68Across 8 skill categories
Modules
267Covering 19 security domains
Lessons
1,656Organised in 801 chapters
Labs, machines & CTFs
8848 lab rooms · 20 machines · 20 CTFs

How you'll learn

Four steps behind every topic.

Each idea goes from explanation to practice to real work. Click a step to see what it looks like.

See the full method
Lesson 2 · Scanning a network Narrated
web-0110.10.14.7
  • 22sshopen
  • 80httpopen
  • 443httpsopen
  • 3306mysqlfiltered
  • 8080http-altclosed

Three ports answered. -sV shows what's listening.

2:14 / 6:30

Paths

Pick a role. We'll map the route.

Choose where you want to work. You'll see every stage between your first lesson and the capstone project that proves you can do the job.

Browse all 31 career paths
Career path · OffensiveIntermediate

Junior Penetration Tester

29 modules 174 lessons 3 stages

  1. 1
    Shared foundations19 modules
    Security roles, ethics and authorisationLab operations and note taking
  2. 2
    Network & infrastructure9 modules
    Reconnaissance and Network MappingNmap and Service Enumeration
  3. 3
    Professional practice1 module
    Client Communications and Consulting
  4. Capstone projectAn authorised test of a corporate network, with a full report

How the 174 lessons work

  • Visual lessons44%
  • Hands-on labs22%
  • Mentor reviews17%
  • Independent cases17%
Start this path

Arena

Challenge anyone. Prove who's better.

Live 1v1 duels and 2v2 squad battles on the same target, against the same clock. Capture the flags first, climb the ladder and earn your rank in front of everyone.

  • 1v1 duels and 2v2 squadsGo head to head or bring a partner. Every match is ranked.
  • Fair by designIdentical targets, isolated instances and one shared clock.
  • Seasons and laddersClimb the rating ladder and earn season badges on your profile.
Enter the arenaHow ranking works
LiveRanked duel · Web exploitation10:00
Blue team
  • YOyou1,842 · Analyst II
0/ 5 flags
VS
Red team
  • NUnullbyte1,867 · Analyst II
0/ 5 flags

Match feed

  • 10:00Match started. Same target, same clock.

First to 5 flags, or most flags when the clock runs out

Sample match

Why Sudo

Not just flags. Real engagements.

Most platforms stop at the flag. We keep going, into the part of the job that actually gets you hired.

Flag-only labA Sudo mission
You start withA bare IP addressA client, a scope letter and a deadline
You're done whenThe flag is foundYour report is accepted
FeedbackRight or wrongA review from your senior analyst
RulesAnything goesWritten authorisation first

Client missions

Scope letters, deadlines and stakeholders, not a bare IP address.

A team that talks back

Your team lead and senior analyst brief you and review your work.

Reports that count

Write up findings and get them checked against a professional checklist.

Ethics built in

No written authorisation, no hacking. Rules come before tools.

Pricing

One subscription. Every path in its tier.

Pick how deep you want to go. Every plan unlocks all the paths and modules in its tier.

Student

33% off Silver

Silver Bundle for verified university students

€20/ month

or €200 a year, save 17%

  • 10 career pathsfull accessEntry-level and intermediate roles
  • 120 modulesfull access720 lessons
  • 29 skill pathsfull accessOf 68 in the catalog

Everything in Silver Bundle, verified with your university email

Includes roles like

  • Junior Cybersecurity Analyst
  • Junior Penetration Tester
  • Web Application Penetration Tester
  • +7 more
View details

Silver Bundle

Core + career paths

€30/ month

or €300 a year, save 17%

  • 10 career pathsfull accessEntry-level and intermediate roles
  • 120 modulesfull access720 lessons
  • 29 skill pathsfull accessOf 68 in the catalog

Includes roles like

  • Junior Cybersecurity Analyst
  • Junior Penetration Tester
  • Web Application Penetration Tester
  • +7 more
View details

Gold Bundle

Most popular

Advanced paths included

€79/ month

or €790 a year, save 17%

  • 23 career pathsfull accessAdds advanced roles in every core track
  • 191 modulesfull access1,200 lessons
  • 52 skill pathsfull accessOf 68 in the catalog

Adds roles like

  • Senior Infrastructure Penetration Tester
  • Active Directory Security Specialist
  • Senior Web and API Security Researcher
  • +10 more
View details

Platinum Bundle

Everything, all tiers

€120/ month

or €1,200 a year, save 17%

  • 31 career pathsfull accessAdds the specialist tracks
  • 267 modulesfull access1,656 lessons
  • 68 skill pathsfull accessOf 68 in the catalog

Adds roles like

  • Endpoint Security and EDR Engineer
  • AI Red Team Specialist
  • AI Security Engineer
  • +5 more
View details

Every plan includes

  • Foundations modules and terminal labs
  • XP, ranks and progress tracking
  • Cancel anytime, access until the period ends
Compare plans

Start your first lab today.

Pick a path, open the first lesson and run your first command on a lab machine in your browser. Nothing to install.

Get startedSee pricing