> For the complete documentation index, see [llms.txt](https://docs.neevcloud.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.neevcloud.com/neevcloud-products/computes/manage-cloud-instance/security-group.md).
# Security Group
A security group is a virtual firewall that controls the incoming and outgoing traffic for instances or resources within a network.
To Create a Security Group follow [links](https://docs.neevcloud.com/neevcloud-products/networking/security-groups/add-security-group).
After creating the security group to attach your server.
**Security Group Update**
* The current Security Group has been set to the default configuration, including the rules.
To add a custom Security Group, follow
Security Groups > Add Security Group
Select the created security group
For more details about security groups follow these [link](/neevcloud-products/networking/security-groups.md)s.
