diff --git a/modules/resources/exercise_networking.md b/modules/resources/exercise_networking.md
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+# Essential Networking on Debian
+
+VirtualBox has multiple options when it comes to it's networking settings.
+We've already used two different ones, *NAT* and *bridged*, but we'll now try to create our own *internal* network.
+For this we'll need a few minimal Debian installations.
+I invite you to install at the least two basic installations.
+
+* One will become our router
+* The other one our first client
+
+## Static routing
+
+The most basic way of setting your network settings in Debian can be found in the `/etc/network/interfaces` file.
+When you open it you'll notice it mentions it sources a folder called `interfaces.d`.
+The choice is up to you whether you set your networking settings in this file or create a new file in the folder but I advise you to go for the second way.
+Don't just *copy/paste* the code below, check whether the interface names and ranges make sense!
+
+```bash
+auto eth0
+iface eth0 inet static
+ address 10.0.0.1
+ netmask 255.255.255.0
+ gateway 10.0.0.1
+```
+
+
+
+If you set both machines with addresses in the same range, you should be able to ping each other.
+Have a go at this until you can make it work.
+Which service do you have to restart of reload to apply your changes?
+
+## Forwarding traffic
+
+One of our machines is supposed to be a router and the other a client.
+Right now we can just ping between both machines but the outside world is completely invisible to us.
+How can we tackle this?
+Do we need more equipment?
+
+An overview of what we would like to accomplish can be seen below.
+
+
+
+In VirtualBox we can add more than one network adapter.
+On the router machine I would like you to add a second network interface and set it to *bridged mode*.
+When you reboot you should notice you have two network cards.
+Can you ping outside of your network now?
+
+You could try and add a dhcp configuration to your `/etc/network/interfaces` file for this second interface.
+Once this is done, how do you ask for an IP address from the dhcp server?
+Have a look at the `dhclient` program to see how it works.
+
+Now, if everything went OK your router should have two IP addresses, one in the 10.0.0.0/24 range and one in the 192.168.0.0/24 range.
+Who gave you this second address?
+Can the client ping both IP addresses?
+Can the client now ping outside of the network?
+
+There are **two** main things you need to do in order for the router to actually route.
+
+1. IP forwarding needs to be setup on the router
+2. NAT needs to be enabled
+
+```bash
+sysctl net.ipv4.ip_forward=1
+iptables -t nat -A POSTROUTING -j MASQUERADE
+```
+
+These settings won't save themselves so next time you reboot they'll be missing.
+There are multiple ways of setting this up.
+Have a look around and find me a good solution!
+
+### Extra Challenge
+
+Your client machines are now behind a NAT.
+Can you think of a way to ssh into them?
+
diff --git a/modules/resources/network_basic.dia b/modules/resources/network_basic.dia
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+
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+ #A4#
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+ #Your Windows workstation#
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+ #Your Debian ROUTER#
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+ #Debian CLIENT 1#
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diff --git a/modules/resources/network_basic.png b/modules/resources/network_basic.png
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diff --git a/modules/resources/network_large.dia b/modules/resources/network_large.dia
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+
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+ #A4#
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+ #Your Windows workstation#
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+ #Your Debian ROUTER#
+
+
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+ #Debian CLIENT 1#
+
+
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+ #Debian CLIENT 5#
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+ #Debian CLIENT 3#
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+ #Debian CLIENT 2#
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+ #Debian CLIENT 4#
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+ #Debian CLIENT 5#
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diff --git a/modules/resources/network_large.png b/modules/resources/network_large.png
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