Attaching a security group to an instance

This article describes how to attach an existing security group to an instance. Want to know more about security groups or how to create a new security group? Then you can read these articles: What is a security group and Creating a new security group

1. Log in to your Mijndomein Cloud dashboard
2. Go to "Compute". This page will show a list of all your instances. 
3. Click the "Options" button of the instance you want to manage
4. A menu will open. Click on "Edit instance" and go to "Security groups"
5. Select the security group you want to attach and press "Save".

Changes to the security groups will take effect immediately and do not require a reboot of the instance.