Solution for the exercises

1. Now continue to create vpc with 4 subnets out of which two subnets are private and 2 are public.

## Create a vpc
aws ec2 create-vpc --cidr-block '10.10.0.0/16'

# For shell scripts export vpcid = 'vpc-0bec25679d1be0400'
#  For powershell $vpcid = 'vpc-0bec25679d1be0400'
# vpc id

aws ec2 create-subnet --cidr-block '10.10.0.0/24' --vpc-id $vpcid
# subnet id
# $subnet1 = 'subnet-01cc74cc2dde74755'
aws ec2 create-subnet --cidr-block '10.10.1.0/24' --vpc-id $vpcid
# subnet id
#  $subnet2 = 'subnet-02eff93367aab7879'
aws ec2 create-subnet --cidr-block '10.10.2.0/24' --vpc-id $vpcid
# subnet id
# $subnet3 = 'subnet-0ae049fff83fcc624'
aws ec2 create-subnet --cidr-block '10.10.3.0/24' --vpc-id $vpcid
# subnet id
# $subnet4 = 'subnet-0c05bfe3d7b003aa2'

# create internet gateway
aws ec2  create-internet-gateway
# internet gateway id
# $igw = 'igw-0a2618cdb8bf0fad3'

# attach internet gateway to vpc
aws ec2 attach-internet-gateway --internet-gateway-id  $igw  --vpc-id $vpcid


# create private route table
aws ec2 create-route-table --vpc-id $vpcid

# {
#     "RouteTable": {
#         "Associations": [],
#         "PropagatingVgws": [],
#         "RouteTableId": "rtb-053c4d74337724a5a",
#         "Routes": [
#             {
#                 "DestinationCidrBlock": "10.10.0.0/16",
#                 "GatewayId": "local",
#                 "Origin": "CreateRouteTable",
#                 "State": "active"
#             }
#         ],
#         "Tags": [],
#         "VpcId": "vpc-0bec25679d1be0400",
#         "OwnerId": "798279872530"
#     }
# }
# $privatert = 'rtb-053c4d74337724a5a'

# create public route table
aws ec2 create-route-table --vpc-id $vpcid

# $publicrt  = 'rtb-0fbabde61ee2edf64'

# create a route for public rt to internet gateway
aws ec2 create-route --gateway-id $igw --route-table-id $publicrt --destination-cidr-block '0.0.0.0/0'


# associate public rt to subnet1 and subnet2
aws ec2 associate-route-table --route-table-id $publicrt --subnet-id $subnet1

# {
#     "AssociationId": "rtbassoc-0ed5fb13e526212ab",
#     "AssociationState": {
#         "State": "associated"
#     }
# }

aws ec2 associate-route-table --route-table-id $publicrt --subnet-id $subnet2
# {
#     "AssociationId": "rtbassoc-031c89f0ff89746dd",
#     "AssociationState": {
#         "State": "associated"
#     }
# }

# associate private rt to subnet3 and subnet4 

aws ec2 associate-route-table --route-table-id $privatert --subnet-id $subnet3

# {
#     "AssociationId": "rtbassoc-09df82b5c4c045b91",
#     "AssociationState": {
#         "State": "associated"
#     }
# }

aws ec2 associate-route-table --route-table-id $privatert --subnet-id $subnet4

# {
#     "AssociationId": "rtbassoc-01327320d20923690",
#     "AssociationState": {
#         "State": "associated"
#     }
# }

2. Create a Security Group and NACL

# Create a security group to allow ssh http and https inbound and everything outbound

aws ec2 create-security-group --description 'Allowsshandhttp' --group-name 'allowimp' --vpc-id $vpcid
# $sgid = 'sg-0a32918b1a48c9986'


aws ec2  authorize-security-group-ingress --group-id $sgid --protocol 'tcp' --port '22' --cidr '0.0.0.0/0'

aws ec2  authorize-security-group-ingress --group-id $sgid --protocol 'tcp' --port '80' --cidr '0.0.0.0/0'

aws ec2  authorize-security-group-ingress --group-id $sgid --protocol 'tcp' --port '443' --cidr '0.0.0.0/0'


# create nacl

aws ec2 create-network-acl --vpc-id $vpcid

# {
#     "NetworkAcl": {
#         "Associations": [],
#         "Entries": [
#             {
#                 "CidrBlock": "0.0.0.0/0",
#                 "Egress": true,
#                 "IcmpTypeCode": {},
#                 "PortRange": {},
#                 "Protocol": "-1",
#                 "RuleAction": "deny",
#                 "RuleNumber": 32767
#             },
#             {
#                 "CidrBlock": "0.0.0.0/0",
#                 "Egress": false,
#                 "IcmpTypeCode": {},
#                 "PortRange": {},
#                 "Protocol": "-1",
#                 "RuleAction": "deny",
#                 "RuleNumber": 32767
#             }
#         ],
#         "IsDefault": false,
#         "NetworkAclId": "acl-0f171f7081fa484c5",
#         "Tags": [],
#         "VpcId": "vpc-0bec25679d1be0400",
#         "OwnerId": "798279872530"
#     }
# }

# $nacl = 'acl-0f171f7081fa484c5'

# add nacl entry to allow communication within vpc both inbound and outbound

aws ec2 create-network-acl-entry --network-acl-id $nacl --ingress  --rule-number 300 --protocol tcp --port-range From=0,To=65535 --rule-action allow --cidr-block 10.10.0.0/16 

aws ec2 create-network-acl-entry --network-acl-id $nacl --egress  --rule-number 300 --protocol tcp --port-range From=0,To=65535 --rule-action allow --cidr-block 0.0.0.0/0 

aws ec2 create-network-acl-entry --network-acl-id $nacl --ingress  --rule-number 310 --protocol tcp --port-range From=22,To=22 --rule-action allow --cidr-block 0.0.0.0/0 

aws ec2 create-network-acl-entry --network-acl-id $nacl --ingress  --rule-number 320 --protocol tcp --port-range From=80,To=80 --rule-action allow --cidr-block 0.0.0.0/0

# deny all traffic from 8.8.8.8

aws ec2 create-network-acl-entry --network-acl-id $nacl --ingress  --rule-number 290 --protocol tcp --port-range From=0,To=65535 --rule-action deny --cidr-block 8.8.8.8/32