A firewall is either a hardware or software device that filters network traffic that's passing through it. This filtering can be done based on many conditions, such as source, target IPs, protocol, or ports. It allows you to secure your network from unwanted access.
The firewall rules allow you to control traffic flow to and from VM-based instances. Firewall rules work independent of the VM operating system and are always enforced if put in an enabled state. VPC acts as a distributed firewall that leverages micro-segmentation. This means that the firewall rules are enforced per virtual machine, even if the machines reside in the same network. The firewall rules are constructed of the following components:
- Ingress (inbound) firewall rules:
- Priority 0: 65545 with a default value of 1000
- Action: allow or deny
- Enforcement: enabled or disabled
- Target (destination...