Reverse VPN or SSH to Windows

[bradmcmahon at gmail.com (Bradley McMahon)]

to setup a reverse ssh connection
ssh -R Port#1:localhost:Port#2 "host address"

-R is the option to setup the reverse proxy
Port 1: this is the port that you need to ssh to from the host in order to
connect back to the machine you initiated the reverse ssh connection
Port 2: is the port your connecting to the host to open the tunnel (default
22 for ssh)
host address is the host your connecting to.

so on the machine you want to connect to you from behind a firewall.
ssh -R 1020:localhost:22 adrian at remote.machine.com

and on your box your connected to to get back into that machine
ssh -p 1020 root at localhost

extra credit:
ssh -C -D 1080 -p 1020 root at loclahost

this will setup a socks proxy so you can actually use any program that
supports socks proxy as if you were on that actual machine, nice for making
changes to routers remotely.

happy hunting.

-Brad



On Mon, Nov 16, 2009 at 3:32 PM, Adrian Crenshaw <irongeek at irongeek.com>wrote:

> Hi All,
>     I'm playing around with making reverse connections out of a NATed of
> network. I can do it with ncat no problems. I've tried to get reverse SSH to
> work from a Linux box (using OpenSSH) behind NAT to a Windows box (using
> putty), but so far no luck. I think it has something to do with no
> gatewayports being present.  Anyone ever set thi up before?
>
> I'd also be interested in a way to do a reverse VPN. Basically, I'd have a
> drop box behind the firewall that would make a VPN connection out to me,
> then I could use any tools I like from my client box. Any ideas on that?
>
> Thanks,
> Adrian
>
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