Can I define custom security groups and port access for my instances?

You can define your own EC2 Security Groups and open more ports for your instances. At the moment you cannot do this directly through Scalarium.

You can either use the EC2 command line tools or the Amazon Web Services Console.

Please check that the created SecurityGroups belong to the same Credential and AWS Region you use in your Scalarium environment. If you use multiple regions/credentials you will have to create the SecurityGroups for each region/credential.

Once you defined a another, custom SecurityGroup you can assign it to any role via the "Role Settings" tab of that role. See also this blog post about custom SecurityGroups.