Você precisa ativar o recurso GatewayPorts no seu arquivo sshd_config
.
trecho da página do manual sshd_config :
GatewayPorts
Specifies whether remote hosts are allowed to connect to ports
forwarded for the client. By default, sshd(8) binds remote port
forwardings to the loopback address. This prevents other remote
hosts from connecting to forwarded ports. GatewayPorts can be used to
specify that sshd should allow remote port forwardings to bind to
non-loopback addresses, thus allowing other hosts to connect. The
argument may be “no” to force remote port forwardings to be
available to the local host only, “yes” to force remote port
forwardings to bind to the wildcard address, or “clientspecified”
to allow the client to select the address to which the forwarding
is bound. The default is “no”.
Algo como isso precisa ser adicionado:
GatewayPorts yes
OBSERVAÇÃO: Reinicie o sshd
depois de fazer essa alteração.
Veja este post anterior para mais detalhes & exemplos: