ssh Туннель -L -R Где какой порт: локальный и удаленный - Туннелирование

Собственно:

• Если у вас флаг -L:
  

   ssh -L

  то первым указываются локальный адрес (если нужно) локальный порт, как в этой заметке про туннель

• Если флаг -R:
  

   ssh -R

  то первыми идет адрес (если требуется) и порт удаленного узал

Источник цитаты далее: https://linuxcommand.org/lc3_man_pages/s...

Ниже цитаты с описаниями:

     -L [bind_address:]port:host:hostport
     -L [bind_address:]port:remote_socket
     -L local_socket:host:hostport
     -L local_socket:remote_socket
             Specifies that connections to the given TCP port or Unix
             socket on the local (client) host are to be forwarded to the
             given host and port, or Unix socket, on the remote side.
             This works by allocating a socket to listen to either a TCP
             port on the local side, optionally bound to the specified
             bind_address, or to a Unix socket.  Whenever a connection is
             made to the local port or socket, the connection is for‐
             warded over the secure channel, and a connection is made to
             either host port hostport, or the Unix socket remote_socket,
             from the remote machine.

............

     -R [bind_address:]port:host:hostport
     -R [bind_address:]port:local_socket
     -R remote_socket:host:hostport
     -R remote_socket:local_socket
     -R [bind_address:]port
             Specifies that connections to the given TCP port or Unix
             socket on the remote (server) host are to be forwarded to
             the local side.

             This works by allocating a socket to listen to either a TCP
             port or to a Unix socket on the remote side.  Whenever a
             connection is made to this port or Unix socket, the connec‐
             tion is forwarded over the secure channel, and a connection
             is made from the local machine to either an explicit desti‐
             nation specified by host port hostport, or local_socket, or,
             if no explicit destination was specified, ssh will act as a
             SOCKS 4/5 proxy and forward connections to the destinations
             requested by the remote SOCKS client.
.............