For me, networks are a very "opaque" thing, and even with reading a lot of tutorial about SSH, I do not understand how to create a basic tunnel to transfer my files.
The configuration is the following :
My Computer --[Internet]--> Bridge Machine --[Local Network]--> Final Machine
Currently I do the following :
1) Connect to the Bridge Machine with : ssh -X email@example.com 2) Connect to the Final Machine with : ssh -X username@finalmachine 3) I copy the address of files I need (for example .../mydirectory) 4) Then I deconnect from the finalmachine with : exit 5) I copy the files to the bridge : scp -r username@finalmachine:/.../mydirectory . 6) I deconnect from the bridge with : exit 7) I copy the files to my machine : scp -r firstname.lastname@example.org:/.../mydirectory .
Which is quite complicated. My question is basic : how to simplify this using a SSH tunnel ?
(and please explain me the signification of each command line you write, to understand what each line really do and to avoid to use it like a magical thing. Furthermore if some ports number are used, explain me if I can pick a completely random number or if I have to choose a specific one.)