When we are moving to the cloud or opting for the cloud, network security is of the utmost importance. On the cloud, we can define the policy at our firewall level to allow and deny the traffic. In AWS, we use VPC to define the network. In VPC, we must create subnets to define the public, private, and management subnets. For SSH or RDP access, we must have either a jump server or bastion host. This will add one additional layer of security. The route table should be properly defined. We must define and configure network ACL to control the incoming and outgoing packets. In security, we only require the ports to be open and the source should be clearly specified. Do not open all the ports to the public.
For private subnet VMs, ...
