[ale] port forwarding with nc

[H. A. Story]

Wow,  This is cool  You know you can get Digi Terminal Servers for about 
$1000.00 or close to it?  And they don't even do ssh I think

James P. Kinney III wrote:

>OK. So I reverse the ends and run the ssh tunnel from B to A and it
>works.
>
>There is a firewall between B and the internet but it was set for full
>forwarding (which is getting closed up now). 
>
>On Thu, 2005-08-25 at 12:47 -0400, James P. Kinney III wrote:
>  
>
>>More stuff:
>>
>>established an ssh tunnel from A to B with:
>>ssh -fNL 26150:machineB:26150 machineB &
>>
>>now try to simply connect netcat to the localhost port 26150:
>>nc localhost 26150
>>
>>I get the error message:
>>
>>channel 1: open failed: connect failed: No route to host
>>
>>????? I'm connecting to localhost. ?!?!?!?!?
>>
>>On Thu, 2005-08-25 at 09:51 -0400, James P. Kinney III wrote:
>>    
>>
>>>The scenario:
>>>
>>>take serial port data from /dev/ttyS14 on machineA and route it securely
>>>with an ssh tunnel to machineB where it is picked up and put onto serial
>>>port /dev/ttyS1
>>>
>>>I have been trying to do it with a combination of nc and ssh as follows:
>>>
>>>on machineA:
>>>#!/bin/sh
>>>
>>>TCP_PORT=26150
>>>SERIAL_PORT=/dev/ttyS14
>>>BAUDRATE=38400
>>>
>>>while (true)
>>>        do
>>>        (stty $BAUDRATE -echo clocal raw pass8 ; exec nc -l -p
>>>$TCP_PORT)  < $SERIAL_PORT > $SERIAL_PORT
>>>done
>>>
>>>followed by:
>>>
>>>ssh -L 26150:machineB:26150 machineB
>>>(ssh connection is with keys)
>>>
>>>And on machineB the same script as above with SERIAL_PORT=/dev/ttyS1
>>>
>>>I keep running into the issue of not being able to "share connections"
>>>to port 26150 on machineA. Both nc and ssh want to lock it on their
>>>connection. How do I get around this?
>>>
>>>(stupid, ancient DOS app that can't be run over a nice fast network
>>>line)
>>>
>>>
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>>>http://www.ale.org/mailman/listinfo/ale
>>>      
>>>
>>_______________________________________________
>>Ale mailing list
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>>http://www.ale.org/mailman/listinfo/ale
>>    
>>
>>------------------------------------------------------------------------
>>
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>>http://www.ale.org/mailman/listinfo/ale
>>