How to connect via SSH with tunnel in ST3?

Question

SSH

In general, there is a server (hereinafter "S1") to which I cannot connect via SSH (blocking on the provider's side).
But I can connect to another server ("S2") and ssh S1 there already. This works fine in the console, but I also need to connect the code editor to this case. I'm using Sublime Text 3 with the "SFTP" module .
There is a setting "sftp_flags" (which can be passed the flags added when starting ssh) ... Accordingly, there is an assumption that somehow this tunneling can be implemented to connect using them.
UPD: there is no sudo access on S2. S1 has

Answer 1

don't suffer x avz.org.ua/wp/2010/06/29/putty-how-to-make-your-wi...

Answer 2

ssh can take a command as an argument, which it will immediately execute after connecting. Try stuffing another ssh to s1 into this argument