I have setup an environment on AWS for a client. I have used squid forwards proxy instead on NAT gateway to allow internet to the servers which reside in a private network on AWS. It is working fine. But now i also want to allow users to connect to SFTP from one of my private Centos server. I have configured squid proxy as a NAT instance by using AMI from AWS. I googled every possible thing and finally came here. Can anybody please help me to achieve this. Any possible solution will be appreciated. Thank you.