Introduction to Virtual Private Cloud (VPC)
Think of a Virtual Private Cloud (VPC) as a private gated community or neighborhood where only you live and control who can access it.
VPC as a Neighborhood: This neighborhood contains houses which represent servers. These servers are where you store your data. The servers can be personal (private servers), workplaces (public servers), or public-facing applications like websites.
Streets (Private Network): The streets in this neighborhood signify a private network. Only you and your family (other resources within your VPC) can use these streets to travel between your houses. Each house (server) has its own unique address (IP address), ensuring all resources can locate each other.
Big Wall (Firewall): This neighborhood is surrounded by a big wall, which represents a firewall that separates your VPC from the outside world (public internet).
Gates and Guards (Security Groups and Access Control Lists): The big wall has gates that symbolize security groups. These gates are guarded by access control lists who act like security personnel, checking the identification (security protocols) of every person (traffic) that wants to enter or leave the neighborhood. You can set the rules for these guards, deciding who (which IP addresses) can use each gate (port).
Pathways (Peering Connections and VPN): There are options to build pathways to other neighborhoods (other VPCs) or a direct, secure path to your office (VPN) that bypasses the public transportation system (internet).
The gated community or neighborhood is your own customizable part of the cloud (AWS, Google Cloud, Azure, etc.). It provides security by separating your resources from the public cloud, while still allowing interaction based on the rules you set.
Key Concepts in VPC
Security Group: The Security Group is like the security system of your home. It controls the inbound and outbound traffic rules, allowing only certain people (trusted IP addresses) to enter and restricts others (untrusted or unknown IP addresses).
Key Pair: The Key Pair is like the keys to your front door. AWS stores the public key (the lock), and you keep the private key (the key). You need the private key that matches the public key to access your EC2 instance (enter your home). Without the correct private key, access is denied.
Instance: The Instance is your home itself, where you keep all your data and applications. The type of instance you choose depends on your needs; you might need a small apartment (low-capacity instance) or a large mansion (high-capacity instance) depending on your data size and processes.
When creating a new EC2 instance, you're building a new home (instance), setting up a security system (security group), and receiving a set of keys (key pair) for access. You can customize the home size and security level as needed. Remember, it's important to keep your keys safe (private key), and configure your security system correctly (security group) to keep your home (instance) secure!
Kommentare