в дефолтном vpc?
Vpc свой, но наклом не закрыто Оказалось что sg и должно применяться к внутренним адресам и интерфейсам: When you specify a security group as the source for a rule, traffic is allowed from the network interfaces that are associated with the source security group for the specified protocol and port. Incoming traffic is allowed based on the private IP addresses of the network interfaces that are associated with the source security group (and not the public IP or Elastic IP addresses). Adding a security group as a source does not add rules from the source security group. For an example, see Default security group for your VPC.
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