Multi-Cloud Firewall Management

Organizations increasingly deploy web servers across multiple cloud providers, requiring consistent security policies across platforms. Several strategies help manage this complexity:

Infrastructure as Code enables consistent firewall deployment across clouds:

# Multi-cloud firewall abstraction
class MultiCloudFirewall:
    def __init__(self, provider):
        self.provider = provider
        
    def create_web_server_rules(self):
        if self.provider == 'aws':
            return self._create_aws_rules()
        elif self.provider == 'azure':
            return self._create_azure_rules()
        elif self.provider == 'gcp':
            return self._create_gcp_rules()
    
    def _create_aws_rules(self):
        rules = [
            {
                'IpProtocol': 'tcp',
                'FromPort': 443,
                'ToPort': 443,
                'IpRanges': [{'CidrIp': '0.0.0.0/0'}]
            },
            {
                'IpProtocol': 'tcp',
                'FromPort': 80,
                'ToPort': 80,
                'IpRanges': [{'CidrIp': '0.0.0.0/0'}]
            }
        ]
        return rules
    
    def _create_azure_rules(self):
        rules = [
            {
                'name': 'AllowHTTPS',
                'protocol': 'Tcp',
                'source_address_prefix': '*',
                'destination_port_range': '443',
                'access': 'Allow',
                'priority': 100,
                'direction': 'Inbound'
            },
            {
                'name': 'AllowHTTP',
                'protocol': 'Tcp',
                'source_address_prefix': '*',
                'destination_port_range': '80',
                'access': 'Allow',
                'priority': 110,
                'direction': 'Inbound'
            }
        ]
        return rules