# API How-Tos [Cloud API](https://api.ionos.com/docs/cloud/v6/) allows contract administrators, owners, and authenticated users with the required permissions to create a NSG and associate it with [Network Interface Cards (NICs)](https://docs.ionos.com/cloud/support/general-information/glossary-of-terms#network-interface-card-nic) or [Virtual Machine (VM)](https://docs.ionos.com/cloud/support/general-information/glossary-of-terms#virtual-machine-vm) resources.
Create a Default Network Security GroupLearn how to create a Default NSG./pages/yd8zR2tuROnRcFPVm0Wr
Create a Custom Network Security GroupLearn how to create a Custom NSG./pages/Q3ePbub5vdB7RHnDv5NZ
Convert a Custom Network Security Group to DefaultLearn how to convert a Custom NSG to a Default NSG./pages/S01ujttkLNsbVXEhDuys
Retrieve Network Security Groups by Group IDLearn how to retrieve a NSG by Group ID./pages/EL40ps8CklkeoVYkTGGK
Retrieve all Network Security GroupsLearn how to retrieve your NSGs./pages/Rq0lLPPDt63BhRKOhb4e
Update a Network Security GroupLearn how to update a NSG./pages/H4nV9pjWx0wY7NspEKBR
Delete a Network Security GroupLearn how to delete your NSGs./pages/3zLmR1JOrbQhWquqwUqg
Create Firewall rule for a Network Security GroupLearn how to create a Firewall rule for the specified NSG./pages/4XXyhD24Ef0f7ols0Lq1
Retrieve Firewall rules by Network Security Group IDLearn how to retrieve all Firewall rules for the specified NSG./pages/4k4pHMoOjlBaG8zyU7R6
Update Firewall rules of a Network Security GroupLearn how to update Firewall rule of the specified NSG./pages/bqsHLsD0R3yPd0AvBfM6
Delete Firewall rule from a Network Security GroupLearn how to delete a firewall rule from a NSG./pages/URD8909TZiQkpbPHyKpT
Attach a List of Security Groups to a Server or NICLearn how to attach a list of NSGs to a server or NIC./pages/pTmfuLhqgIumD0dF4MjZ
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