AWS - Elastic Load Balancing
An NLB is not forwarding traffic to targets even though they are healthy. What could be a common misconfiguration?
An NLB is not forwarding traffic to targets even though they are healthy. What could be a common misconfiguration?
medium📝 Debug Q7 of 15
Step-by-Step Solution
Solution:
Step 1: Identify common network issues
If security groups on targets block inbound traffic from client IP addresses, traffic will not reach targets despite health checks passing.Step 2: Evaluate other options
Cross-zone load balancing enabled is not a cause for blocking traffic; correct ports and passing health checks indicate proper setup.Final Answer:
Security group attached to targets blocking inbound traffic from client IP addresses -> Option BQuick Check:
Security group blocking = no traffic forwarded [OK]
Quick Trick: Check security groups allow inbound from clients [OK]
Common Mistakes:
- Ignoring security group rules
- Blaming cross-zone load balancing
- Assuming health checks guarantee traffic flow
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