DigitalOcean Cloud Firewalls are a network-based, stateful firewall service for Droplets provided at no additional cost. Cloud firewalls block all traffic that isn’t expressly permitted by a rule.
To destroy a firewall, from the Networking section of the control panel, click the Firewalls tab. Open the More menu of the firewall you want to destroy and click Destroy.
In the Destroy Firewall window that opens, click Confirm to destroy the firewall. Destroying a firewall does not destroy the Droplets that were associated with it.