SSH ProxyJump: Connect SSH Through an Intermediate Server

SSH ProxyJump is a feature in OpenSSH 7.3+ that allows connecting to a target server through intermediate machines (jump hosts).

Usage

ssh -J user@bastion user@target

SSH Config Setup

Host myserver
  HostName private-server.internal
  User dev
  ProxyJump admin@bastion.example.com
  IdentityFile ~/.ssh/id_rsa

Then simply: ssh myserver