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There are several possible reasons why you are experiencing network connection issues with your Linux instances on AWS:
- Security Group Rules: Check the security group rules of your instance and ensure that the ports required for your application are open for incoming traffic.
- Network Configuration: Check the network configuration of your instance and ensure that the IP address, subnet mask, and gateway are correctly configured.
- Route Tables: Verify the route tables to make sure that they are correctly configured and point to the correct Internet Gateway or NAT Gateway.
- DNS Resolution: Check the DNS resolution of your instance and ensure that it can resolve hostnames to IP addresses.
- Resource Exhaustion: Verify that your instance has enough resources, such as CPU, memory, and disk space.
- Instance Health: Check the system log and CloudWatch Logs to identify any potential issues with the instance's health.
- Instance Type: Consider upgrading the instance type to a larger one if the current instance type is unable to handle the workload.
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