Security Group

A group of rules that apply to inbound and outbound network traffic for a VM. A security group acts as a virtual firewall that controls the inbound and outbound network traffic for the VMs to which the group has been assigned.

Rules are defined based on what type of network traffic should be allowed to the VM to which the security group is assigned. Traffic that does not match any of the rules assigned to an instance, is denied access, by default.

A default rule is predefined that allows all outbound traffic from the VM to which the security group has been assigned.