AWS For Beginners

Requirement: Create 3 EC2 instances (Machine A, Machine B and Machine C)in 3 different VPCs(VPC A, VPC B, VPC C). We should be able to do SSH from Machine A to Machine B and from Machine B to Machine C. However, we should NOT be allowed to Machine B to Machine A as well as Machine C to Machine B Solution: 1.        Create two VPC with CIDR Range 10.0.1.0/24, 10.0.2.0/24 & 10.0.3.0/24 2.        Create Subnet in respective VPC with range same as VPC CIDR 3.        Create two Internet Gateway and attach to respective VPC. 4.        In default Route Table add the default Rule (0.0.0.0/0) and target to Internet Gateway. 5.        Create Peering connections (for VPC Peering) a.        Select the Source as VPC A and destination as VPC B b.        Accept the...

VPC Peering VPC Peering feature is used when we need to establish connectivity between subnet in two different VPCs in the same or different account. Let’s take a scenario of creating VPC Peering between two VPC in the same account to keep it simple. NOTE: All the IP address and CIDR range depicted in the below diagram and subsequent steps is for example only. Step 1: Create a VPC A with CIDR Range 10.0.0.0/16 and keep Default in Tenancy dropdown.   Step 2: Create a VPC B with CIDR Range 172.16.0.0/16 and keep Default in Tenancy dropdown.  Step 3: Enter Name tag as SubNetA and map to VPC A in VPC dropdown. Note that VPC CIDRs of VPC A is auto-populated and status as associated. Selecting Availability zone is not mandatory. However, AWS will select one of the Availability Zone when we create a subnet. Enter 10.0.1.0/24 as IPv4 CIDR block and then click on Create button. Step 4: Create SubNet A and map to VPC B in VPC dropdown. Note th...