[ale] port forwarding with nc

[James P. Kinney III]

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)
> > 
> > 
> > _______________________________________________
> > Ale mailing list
> > Ale at ale.org
> > http://www.ale.org/mailman/listinfo/ale
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://www.ale.org/mailman/listinfo/ale
-- 
James P. Kinney III          \Changing the mobile computing world/
CEO & Director of Engineering \          one Linux user         /
Local Net Solutions,LLC        \           at a time.          /
770-493-8244                    \.___________________________./
http://www.localnetsolutions.com

GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
<jkinney at localnetsolutions.com>
Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7
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