diff --git a/modules/resources/exercises_raspberrypi.md b/modules/resources/exercises_raspberrypi.md
index 81b7289..b48fe73 100644
--- a/modules/resources/exercises_raspberrypi.md
+++ b/modules/resources/exercises_raspberrypi.md
@@ -70,7 +70,7 @@ Can you *accidentally* log into the wrong PI?
 How would you make it more clear for yourself (and others) that your PI is yours?
 
 If you made it this far you should know your IP address.
-There is a webserver running on my raspberry pi who you can find at `172.30.6.108` this webserver is serving a file called `accounts.csv`.
+There is a webserver running on my raspberry pi who you can find at `172.30.6.96` this webserver is serving a file called `accounts.csv`.
 Please download it and create user accounts for all these people.
 The username should be the `$USERNAME` part of their matrix handle and as a password their `$FIRSTNAME$LASTNAME`.
 
@@ -82,3 +82,17 @@ Can you connect to our matrix server and send us a message from this computer?
 How can we exchange files between this computer and our windows machine?
 Some sort of FTP server would be handy no?
 Can you set one up for all our users?
+
+## Setting up a fileserver
+
+Have a look at the accounts.cvs file again.
+The last collumn is a *teams* collumn.
+Please add all the users to either the *red* or the *blue* team group.
+You probably need to create these groups first no?
+
+You are yourself in one of the groups and you consider the people in the same group to be your trustworthy friends.
+The other team you consider them less trustworthy so you don't want to give them shell access.
+There is a feature in the sftp server included into the ssh server that allows you to do this.
+How do you make the sshd daemon aware of changes in the config file?
+
+Test all of this out with people from your team and the other team.