Working With Bastion Host

In last Lab, we made the private subnet which is completely isolated now, to manage the private EC2 instance we would need Jump Server or Bastion Host in public
We would first login to public EC2 and then take SSH of private EC2 instance
We would need make sure Private-1B-SG has port 22 or SSH allowed for Public-1A-SG
Now, login to Public EC2 and make sure .pem is copied to this instance, since this would be need to SSH into private EC2
You can upload pem to S3 bucket make it publicly accessible and do a wget in your public EC2
```
wget https://S3-PEM-FILE-URL
```
After downloading you would need to give pem file proper permission
```
chmod 400 FILENAME.pem
```
then do SSH
```
ssh -i FILENAME.pem ec2-user@PRIVATEIP
```
Dont close the SSH session or delete the EC2 instances as we will need in next lab
Similarly, we can try Bastion host for Windows EC2 as well