[EC2] Action items when Tomcat restart fails on instance

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  1. Environment
    1. Tomcat is installed and operated separately on an EC2 instance.
    2. Remote access to the EC2 instance running Tomcat is made from an on-premise VDI, not through a Bastion host.
    3. When attempting to restart Tomcat after remotely connecting to the EC2 instance from the on-premise VDI, a Tomcat shutdown error occurs.
  2. Action
    1. Add Tomcat port to the Security Group of the EC2 instance running Tomcat as a loopback
      • Source: Security Group of the EC2 instance running Tomcat (Loopback)
      • Registered ports: Inbound rule: TCP / 8005, 8009, Outbound rule: TCP / 8009

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