[ale] OT: ICMP Tunnel

[Christopher Fowler]

On my trp to IL and MN, I ran into 2 instances of attempting to
get fast internet access.  In both instances, I could ping a remote
host but could do nothing else.  When I would fire up a browser, I
would be directed to a page prompting me to pay X amount of dollars
for short term access.  So I had a thought of building a tunnel that
would create a VPN back to a host running a server for that tunnel.

The idea is to use the data portion of the ICMP packet to store 
a packet header plus data that should be redirected to a pppd 
server running on both the client and the server.  Since ping was
successful between the networks, This woul make it possible to 
do a network tunnel using ICMP as the transport.  The only
problem is that ICMP is not a reliable protocol so all the
reliability will have to be built into the client and the
server.  It will be a tad slower than paying the fee but far
cheaper. 

Any ideas?

Chris

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