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Re:SSH hacks – a little sanity for remote workers by ryukafalz on Wednesday April 29, 2020 @10:36PM (#23026922)
>If you're using an older SSH you can do this with a `ProxyCommand` (requires netcat on the jump box, but that's pretty standard)

Even without ProxyJump, you can do something similar with ProxyCommand without netcat:

    Host final
    HostName host.example.com
    ProxyCommand ssh -W %h:%p [email protected]
(Granted, this is still more recent, but I think ProxyJump was introduced later than this.)

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