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Doing a bunch of traveling recently in Asia (adventures blogged
here: http://blog.redswoosh.net), I’ve
found myself in many situations where I’ve had to purchase wireless Internet
access, quite often at double or triple the prices seen in the States. Before paying however, I am almost always able to do a DNS
look-up and sometimes even ping remote hosts, though normal Internet traffic
over port 80 (and various other ports) is blocked. It got me to thinking about ICMP tunneling around these
wireless “toll booths” so I could travel Asia and even the states
without having to communicate over those popular ports that cost money to
communicate over. Maybe something could be coded up to tunnel over ICMP to a
proxy server (or proxy peer), that then translates communication back to the
intended protocol and port and forwards communication along. It seems
that at least theoretically, with raw sockets and promiscuous settings, even on
Windows machines, this should be possible. Anybody have experience with tunneling over this widespread,
but often forgotten protocol and port? Could it also be useful for NAT
traversal in extreme conditions? Alex (pankratov), do you have any experience with Hamachi on
this tip? T Travis Kalanick Blog – http://blog.redswoosh.net |
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