# Replace ProxyJump in ~/.ssh/config

ssh

I'm am using ProxyJump in my ~/.ssh/config

Host jump
User jane
HostName 1.2.3.4
DynamicForward 1028
Host dev
User bill
HostName 5.6.7.8
ProxyJump jump


My colleague is using an old version of ssh (which they are unable to update). What would be the equivalent configuration to allow them to connect via the jump host? Would DynamicForward still work?

ProxyJump was added in OpenSSH 7.3 but is nothing more than a shorthand for using ProxyCommand, as in:
Host hidden-host

If your ssh version is even older, you might lack the -W option, in which case you can use nc, as in:
Host hidden-host