ssh/config Setup for jump server

Guide

Intro

Assuming your situation is that connecting to a jump server is a must, in order to access EC2.

And now you don't want to connect to jump server manually every time, follow the procedure below to simplify the process.

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Setup .ssh/config

Short Method:

Host xxxx_jumpserver
    Hostname <jump server ip>
    User keith
    IdentityFile /Users/xxxx/.ssh/id_rsa
    Port 23422
    ForwardAgent Yes
    PubKeyAuthentication Yes
    UseKeychain Yes
Host ec2sandbox
    HostName <ec2 ip/hostname>
    User keith
    ProxyCommand ssh -W %h:%p xxxx_jumpserver
    # Only needed if you want to do port forwarding (tunnel)
    LocalForward 8888 localhost:8888

Long method:

Modify the .ssh/config as below

... some other lines...

Host <jump server ip address here>
        ForwardAgent yes
        IdentityFile <Full path to your key file>
        UseKeychain yes

... some other lines...

Replace the <jump server ip address here> as the jump server ip And replace the as the FULL path to your key file

Then you are done ! Simply type below to connect to ec2

ssh  -J <your username>@<jump server ip>:23422 <ec2 username>@<your ec2 host>

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