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What tool are you using to check the ports? And as well as the security groups check that there isn't a host-based firewall in which the ports need to be opened - this could be Windows Firewall on Windows, ufw on Ubuntu, firewalld on RHEL, and so on.
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- AWS OFICIALAtualizada há 2 anos
I have saved the rules and also went back multiple times to check they saved