An application load balancer cannot be used here because it only supports HTTP(S) listeners. This can be achieved by creating a listener in the network load balancer as shown below. And you also don’t need to pay for a bastion host! Wouldn’t it be great if you could target your SFTP connection to a load balancer in front of the auto-scaling group, instead of individual instances in the group itself? The LB won’t change its DNS name, unlike the private IP of the EC2s behind it. Not to mention that they’re most likely not publicly accessible & you’ll need a bastion host to SFTP to them anyway. Click on the launch instance to start configuring your own ec2. On linux or macos, open a command terminal. The problem here is that since the instances are in an auto-scaling group, they could die & get recreated at any time & when they do, they change their IPs. In Filezilla Click On Edit > Settings > Sftp. Or maybe you just want to download tons of application logs by SFTP-ing to the instances directly. Maybe they’re web servers sharing an EFS & you need to get to that mounted EFS via SFTP. Say you have a number of EC2 instances in an auto-scaling group & you need to be able to connect to them via SFTP.
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