AWS NAT Gateway Troubleshooting Guide
Disable source/destination checking on NAT instance, ensure proper routing & IPTables config. Also, permit inbound traffic from private subnets & implement TCP keepalive to prevent connection timeout issues.
Network Address Translation (NAT) instances in AWS sometimes encounter connectivity issues when forwarding traffic from private EC2 instances. Here's a detailed analysis of common problems and their solutions. Key Configuration Points Source/Destination Check Disable source/destination checking on the NAT instance, as this is often the root cause of connectivity issues[3]. Network Configuration Ensure the private subnet's route table directs 0.0.0.0/0 traffic to the NAT instance The NAT instance must reside in a public subnet with proper routing to the Internet Gateway Es...