You have a business-to-business web application running in a VPC consisting of an Elastic Load Balancer (ELB), web servers, application servers and a database. Your web application should only accept traffic from pre-defined customer IP addresses. Which two options meet this security requirement? (Choose two.)

Topic #: - All AWS-SysOps Questions

A. Configure web server VPC security groups to allow traffic from your customers’ IPs
B. Configure your web servers to filter traffic based on the ELB’s “X-forwarded-for” header
C. Configure ELB security groups to allow traffic from your customers’ IPs and deny all outbound traffic
D. Configure a VPC NACL to allow web traffic from your customers’ IPs and deny all outbound traffic

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