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aws ec2 describe-tagsuses the AWS API and not the IP address or the DNS domain name. Three different things with different documented behaviors.aws ec2 describe-tagsconnects toec2.eu-west-2.amazonaws.combut in--debugmode this connection stage hangs. Any ideas why? Thanks.aws ec2 describe-tagscommands, and which EC2 instances work and don't work are too vague to troubleshoot definitively. My best guess is that you've launched new EC2 instances in private subnets that don't have NAT gateways, or you've launched new EC2 instances in public subnets but haven't given them public IP addresses.