Multiple hosts

While the example given previously is relatively simple, it's worth noting that you can do some pretty complex things with ProxyJump.

You can list hosts, as the manual page suggests, and you can also chain hosts, as follows:

Host *
Port 22

Host CentOS2-V4
Hostname 192.168.33.11
User vagrant

Host CentOS3-V4
Hostname 192.168.33.12
User vagrant
ProxyJump CentOS2-V4

Host CentOS4-V4
Hostname 192.168.33.14
User vagrant
ProxyJump CentOS3-V4

The advantage of ProxyJump itself should be obvious: using this technique, you can create a setup where it only takes one command from your local machine to access a remote and otherwise inaccessible box.

Generally, you might use ProxyJump in an environment with one ingress server.

ProxyJump also makes forwarding ports easier. If you add a LocalForward line to CentOS4-V4 in the preceding code, SSH will take care of handling the traffic through the ProxyJump hosts, too! This can be especially handy as it stops you having to forward ports manually, potentially through several hosts.