in command sudo ssh -gL 80:127.0.0.1:8080 localhost
option -g - Allows remote hosts to connect to local forwarded ports
option -L - [bind_address:]port:host:hostport
Specifies that the given port on the local (client) host is to be
forwarded to the given host and port on the remote side. This
works by allocating a socket to listen to port on the local side,
optionally bound to the specified bind_address. Whenever a
connection is made to this port, the connection is forwarded over
the secure channel, and a connection is made to host port
hostport from the remote machine. Port forwardings can also be
specified in the configuration file.
traffic from port 80 redirected to port 8080 on localhost