AWS Network Load Balancer (NLB) is designed for handling TCP and UDP traffic with ultra-low latency. Direct integration with an EC2 instance ensures robust network performance.
1. Prerequisites
A running EC2 instance in a VPC.
IAM permissions for managing EC2 and NLB resources.
Security group rules allowing traffic to/from the instance.
2. Create an NLB
1. Navigate to EC2 > Load Balancers.
2. Click Create Load Balancer and select Network Load Balancer.
3. Configure basic settings:
Specify a name (e.g., MyNLB).
Choose an internet-facing or internal scheme.
Select the appropriate VPC and availability zones.
4. Define a listener:
Add listeners for required protocols (e.g., TCP on port 80 or 443).
3. Create a Target Group
1. In the Target Groups section, click Create Target Group.
2. Choose Instances as the target type.
3. Specify a name (e.g., NLBTargetGroup) and protocol (TCP/UDP).
4. Add the EC2 instance to the target group.
4. Associate Target Group with NLB
1. Return to the NLB settings.
2. Under Listeners, select the listener and associate it with the target group.
3. Save the configuration.
5. Test and Monitor
1. Obtain the NLB DNS name.
2. Test connectivity using tools like curl or telnet.
3. Use CloudWatch metrics for monitoring NLB performance.
Conclusion
Integrating EC2 instances with WAF and NLB establishes a secure and high-performance architecture. WAF ensures application-layer security, while NLB handles network-layer traffic efficiently. Combining these services enhances scalability, availability, and protection against threats.
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