To create a Bastion server utilizing AWS CloudFormation, it is advisable outline the required assets in a CloudFormation template. Right here’s an instance of how one can create a Bastion server utilizing CloudFormation:
AWSTemplateFormatVersion: "2010-09-09"
Assets:
BastionSecurityGroup:
Sort: AWS::EC2::SecurityGroup
Properties:
GroupDescription: Bastion Safety Group
SecurityGroupIngress:
- IpProtocol: tcp
FromPort: 22
ToPort: 22
CidrIp: 0.0.0.0/0
VpcId: "your-vpc-id"
BastionInstance:
Sort: AWS::EC2::Occasion
Properties:
ImageId: "your-ami-id"
InstanceType: "t2.micro" # Replace with the specified occasion kind
SecurityGroupIds:
- !Ref BastionSecurityGroup
KeyName: "your-key-pair-name"
UserData:
Fn::Base64: !Sub |
#!/bin/bash
echo "AllowTcpForwarding sure" >> /and so forth/ssh/sshd_config
service sshd restart
iptables -t nat -A PREROUTING -p tcp --dport 22 -j REDIRECT --to-port 2222
iptables-save > /and so forth/sysconfig/iptables
systemctl allow iptables
systemctl restart iptables
BastionEIP:
Sort: AWS::EC2::EIP
Properties:
InstanceId: !Ref BastionInstance
Within the CloudFormation template:
- The
BastionSecurityGroup
useful resource creates a safety group permitting SSH entry on port 22 from any IP tackle (0.0.0.0/0
). Ensure that to interchange"your-vpc-id"
with the ID of your VPC. - The
BastionInstance
useful resource creates an EC2 occasion utilizing the required Amazon Machine Picture (AMI) and occasion kind. Replace"your-ami-id"
with the ID of the specified AMI, and"your-key-pair-name"
with the identify of your EC2 key pair. - The
UserData
property runs a sequence of instructions on the Bastion occasion to allow SSH forwarding, redirect SSH visitors from port 22 to 2222 (helpful if in case you have different companies already utilizing port 22), and restart the required companies. - The
BastionEIP
useful resource associates an Elastic IP (EIP) with the Bastion occasion, offering it with a static public IP tackle.
Be sure you have the required permissions to create EC2 cases, safety teams, and EIPs in your AWS account earlier than deploying this CloudFormation template. Alter the template in line with your particular necessities.