|Work with the Eucalyptus User Console / Work with Security Groups|
Eucalyptus enables you to control access to your cloud using security groups. A security group contains a group of rules that control inbound traffic to instances in the group for the specified protocols and ports.
To grant access to an IP address or range of IP addresses, select the IP Address radio button and enter a CIDR range in the text box.
To grant access to another security group, select the Other security group radio button and enter the name of the security group in the text box.