Security Groups — Overview
A Security Group is a virtual firewall that controls inbound and outbound network traffic for resources in your VPC. Each Security Group contains a set of rules that define which traffic is allowed or denied in the inbound (Inbound) and outbound (Outbound) directions.
How Security Groups work
When you attach a Security Group to a resource (for example, a virtual server), the system inspects every packet entering or leaving that resource against the configured rules:
- Inbound rule — controls traffic flowing from outside into the resource.
- Outbound rule — controls traffic flowing out from the resource.
Traffic that does not match any rule is denied by default.
Scope of applicability
Security Groups are available on both VPC types:
| VPC type | Security Groups supported |
|---|---|
| General VPC | Yes |
| Specific VPC | Yes |
What you can do
| Action | Description |
|---|---|
| Create a Security Group | Define a new set of firewall rules for a resource |
| Add / edit / delete rules | Configure inbound and outbound rules for each Security Group |
| Attach a Security Group to a resource | Apply the rule set to a virtual server or network resource |
| Edit Security Group information | Update the name, description, or tags |
| Delete a Security Group | Remove a Security Group when it is no longer needed |
Navigation
To access Security Groups, from the left navigation panel within the VPC context:
VPC → Network → Security Groups