Scp through ssh tunnel opened

Question

I want to send files from machineA which has opened a reverse tunnel with a server. The reverse tunnel connects port 22 on machineA with port 2222 on the server:

Answer 1

You can use ControlMaster option in your ssh_config (~/.ssh/config), which will create persistent connection for further ssh/scp/sftp sessions. It is easy as pie:

Host yourhost
  Hostname fqdn.tld
  Port port_number # if required, but probably yes, if you do port-forwarding
  ControlMaster auto
  ControlPath ~/.ssh/master-%r@%h
  ControlPersist 5m