Skill · Networking · Operate and troubleshoot network services
Translate addresses: SNAT, DNAT and port forwarding
Understand SNAT, DNAT and masquerade, then turn a Linux box into a gateway with nftables: connection sharing, port forwarding and checking with conntrack.
Start lesson 1The Networking domain
- 2 lessons
- ~1 h 35 of reading
- 2 quizzes
- 0 proof lab
The path
Where it comes from, where it leads
What you need to know first, where you stand on this skill, and what it opens next. Your status is computed in your browser, from what you have read and passed.
Before · 2 prerequisites
- Address in IPv4 and read a routing table
- Tell TCP from UDP and interpret refusals, timeouts and resets
Recommended before · 1
This skill, for you
Translate addresses: SNAT, DNAT and port forwarding
Computing
It unlocks · nothing yet
No other skill requires it: it is an end-of-path skill.
The path through the foundations From the most upstream foundation to this skill: what is in place, what remains to read.
Lessons
How to learn it
2 lessons, about ~1 h 35, in program order. Each lesson ends with its quiz.
The program
2 lessons · ~1 h 35
Part 1 · Les services qui font tourner un réseau (in French) 1 lesson · ~25 min
Part 2 · Secure 1 lesson · ~1 h 10
Beyond the lessons
Assess, practise, pass the proof
Reading a lesson confirms nothing. A skill is confirmed by a passed quiz, practised in a guided lab, and put to the test by a challenge or a mission; an imported lab result is not verified by the site.
Assess yourself
2 quizzes
At the end of the lessons: passed at 70%, they confirm the skill.
Proof
No proof
Neither a challenge nor a mission with a proof yet.
Placement test
Preparing the questions…
Your answers in detail
For each question asked: your answer, the correct answer, its explanation and the page to reread.
Around it
Who requires it, who teaches it
Required by
- Linux Administrator
- LFCS
In red: the certification it prepares for.
Taught by
Same block · Operate and troubleshoot network services