GCP VM Firewall Configuration

I have a single Google Cloud VM that serves both my application (Nginx) and its database. I’d like to harden it by adding a cloud-native firewall layer and turning on full traffic visibility. Here’s the scope: • Use GCP’s built-in VPC firewall (no third-party appliances) to create the rule set... (Budget: $30 - $250 USD, Jobs: Cloud Security, Google Cloud Platform, Linux, Network Administration, Network Security, Nginx, System Admin, System Administration)