Proxy Jump in SSH Connections

proxy-jump-ssh-connection.md

Create config file for ssh (my.conf):

Host Server1
    User root
    HostName 192.168.100.10
Host Server2
    User root
    HostName 192.168.100.5
Host Server3
    User root
    HostName 192.168.100.2
    ProxyJump Server1, Server2

Expect code (server3.sh):

#!/bin/sh
/usr/bin/expect <<EOF
spawn ssh -F my.conf Server3
expect "password"
send "PASSWORD-OF-SERVER-1\r"
expect "password"
send "PASSWORD-OF-SERVER-2\r"
expect "password"
send "PASSWORD-OF-SERVER-3\r"
expect "$"
interact
EOF

Try it:

$ server3.sh

Good reference: https://en.wikibooks.org/wiki/OpenSSH/Cookbook/Proxies_and_Jump_Hosts

scp sample command:

$ scp -F my.conf myfile Server3:/root/