AWS Network Firewall是一种AWS托管的网络防火墙服务，用于监控和控制流量。使用AWS Network Firewall可以轻松设置和规划规则，过滤流量并保护网络。

与之相反，Cloudwatch日志是一种AWS托管的日志管理服务。使用Cloudwatch日志，您可以监视您的AWS资源并捕获、存储和处理日志。

以下是使用AWS Network Firewall和Cloudwatch日志记录防火墙流量的示例代码：

首先，我们要创建一个AWS Network Firewall实例。

import boto3

client = boto3.client('network-firewall')

response = client.create_firewall(
    FirewallName='example-firewall',
    FirewallPolicyArn='arn:aws:network-firewall:us-west-2:111122223333:firewall-policy/example-firewall-policy',
    VpcId='vpc-12345678',
    SubnetMappings=[
        {
            'SubnetId': 'subnet-01234567',
            'EndpointId': 'vpce-0123456789abcdef0'
        },
    ],
    DeleteProtection=False,
    Description='This is an example firewall'
)

然后，我们要配置AWS Network Firewall以将流量发送到Cloudwatch日志。

response = client.associate_firewall_policy(
    FirewallArn='arn:aws:network-firewall:us-west-2:111122223333:firewall/example-firewall',
    FirewallPolicyArn='arn:aws:network-firewall:us-west-2:111122223333:firewall-policy/example-firewall-policy',
    UpdateToken='example-update-token'
)

response = client.update_logging_configuration(
    FirewallArn='arn:aws:network-firewall:us-west-2:111122223333:firewall/example-firewall',
    LoggingConfiguration={
        'LogDestinationConfigs': [
            'arn:aws:logs:us-west-2:111122223333:log-group:example-log-group:example-log-stream'
        ],
        'LogDestinationType': 'S3',
        'RedactedFields':