# Convert Custom Network Security Group to Default

Default NSGs provide a standardized set of security rules and automatically add every newly provisioned VMs as a member, making it easier to maintain and scale your network security as your organization grows. It also reduces administrative overhead by eliminating the need to configure and update security rules manually.

{% hint style="info" %}
**Prerequisites:** Ensure that you have appropriate permissions to create NSGs. Only contract administrators, owners, and users with permissions to the corresponding VDC can create and manage NSGs.
{% endhint %}

{% hint style="info" %}
**Note:**

* Only one security group can be a default group at a time.
* A default security group is created with the four default rules. However, the rules are not created when you convert an existing custom NSG to a default NSG. For more information, see [<mark style="color:blue;">FAQs</mark>](/cloud/security/network-security-groups/nsg-faqs.md#what-predefined-rules-does-a-default-network-security-group-contain).
  {% endhint %}

## Convert from custom to default

To convert a custom NSG to a default NSG, follow these steps:

1\. In the **DCD**, go to **Menu** > **Security** > **Network Security Groups**.

2\. Select a data center from the drop-down list.

3\. Select an NSG and click **Set as default** in the **Network Security Groups** window to convert the respective custom group to default.

![Set as default](/files/fi6zr6WrsEzpqSpGVXCS)

* Alternatively, on the **Network Security Groups** window, you can select the **NAME** of the respective security group or select **View & Edit** for the respective security group:

![Alternative options](/files/jDGP5IQFxcr6U2iLyi9R)

* Next, select **Set as default** in the **Security Group Details** window.

![Set as default](/files/PET8Z6jdsyNdIB7TTZ80)

4\. Select **Confirm** in the pop-up window.

{% hint style="success" %}
**Result:** The selected NSG is converted to the default group.
{% endhint %}

![The group is set to Default](/files/rnFCteKdgl6v5erQS8Ga)

## Revert from default to custom

1\. Select **Remove default status** in the **View & Edit Group** window to remove the default status.

![The Default NSG is converted to Custom](/files/4LVmk19mit5FvjtxonEJ)

2\. Select **Confirm** to confirm the status change.


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