Multi-Hop Connection

[yang (Yang.Y)]

There is a similar question on SO, but using ssh command line:

SSH from A through B to C, using private key on B

The principle behind the selected answer also applies to Core Tunnel, but in your case, we need do some more extra job:

local ------> jump1 ------> jump2 ------> target
         ^             ^
   using local's  using jump1's
     ssh key        ssh key

Firstly, we must enable an advanced feature in Core Tunnel:

Use system default `ssh_config` and `known_hosts` configuration

By default, Core Tunnel uses configuration files in its own container folder: # known_hosts ~/Library/Group Containers/E78WKS7W4U.io.coressh.ssh/.ssh/known_hosts # ssh_config ~/Library/Group Containers/E78WKS7W4U.io.coressh.ssh/.ssh/config This works very well in most of cases. But if you have a lengthy ~/.ssh/config or /etc/ssh/ssh_config, or have StrictHostKeyChecking set to yes and use ~/.ssh/known_hosts, /etc/ssh/ssh_known_hosts as the only source data trusted host keys, you may want to u…

Then edit your ~/.ssh/config file and add some lines like this:

Host jump2
    ProxyCommand ssh -A jump1 'ssh-add && nc %h %p'

Then edit settings of your tunnel for target, set Proxy Jump option to jump2:

Then every thing should work. If you run into any problem, please enable debug log and paste at here (don't forget eliminate sensitive information):

Enable logging

The default logging level is set to Info, Debug1, Debug2 and Debug3 each specify higher levels of verbose output. [image] Core Shell Open or go to Hosts tab, right click on the host and select Edit Settings… from context menu, navigate to Connection tab, then scroll down to Log Level option. Press ⌘ I (or select Shell -> Show Inspector from main menu) reveals shell session information, as well as log content. [image] Core Tunnel Navigate to tunnel's Settings…, Connection tab, then scrol…

Good luck