[ Thanks to Dmitri
Popov for this link. ]
“Reverse SSH tunneling is a common technique for making a
machine sitting behind NAT accessible from the Internet. Usually,
this involves some command-line trickery, but localtunnel provides
a hassle-free way to enable access to a server on a local
network.“Most people have a standard internet setup where you have a
router connected to the internet with a single IP address, and a
network of computers that all ‘share’ the same IP address. This is
great for two reasons: the first one is that the network is very
safe, as it’s unreachable from the outside. It also means that any
one specific computer can ‘get out’, but nothing can connect ‘to
it’ so to speak.”