About non 24/7 tunnelbrokers

[itojun@iijlab.net]

>The best approach to this is having some client/server 
>application, where the user logs on to the tunnelbroker
>via telnet, and issues something like this:
>USER <local-user>
>PASS <hispassword>
>TUNNEL TO 212.26.212.123
>TUNNEL UP
>..
>and then the server will send a PING every 60 seconds or
>so, to which the client must respond a PONG or else he
>will get disconnected and the tunnel will be set to down
>state (thus not sending unwanted traffic to the next user
>of the IP).

	there was a protocol proposal made by Peter Tattam, just like the
	above.  it used APOP for user authentication.  an implmentation 
	is included in KAME distribution under "dtcp" directory.  imasy.or.jp
	has been using this.   not sure where the protocol proposal (internet
	draft) went.  I guess he is too busy.

itojun