[nanomsg] Re: off topic: traversing http firewalls
- From: George Lambert <marchon@xxxxxxxxx>
- To: nanomsg@xxxxxxxxxxxxx
- Date: Wed, 25 Feb 2015 21:47:50 -0500
Reverse SSH Tunneling
Have you ever wanted to ssh to your Linux box that sits behind NAT?
Now you can with reverse SSH tunneling. This document will show you
step by step how to set up reverse SSH tunneling. The reverse SSH
tunneling should work fine with Unix like systems.
Let's assume that Destination's IP is 192.168.20.55 (Linux box that
you want to access).
You want to access from Linux client with IP 138.47.99.99.
Destination (192.168.20.55) <- |NAT| <- Source (138.47.99.99)
1. SSH from the destination to the source (with public ip) using command below:
ssh -R 19999:localhost:22 sourceuser@138.47.99.99
* port 19999 can be any unused port.
2. Now you can SSH from source to destination through SSH tuneling:
ssh localhost -p 19999
3. 3rd party servers can also access 192.168.20.55 through Destination
(138.47.99.99).
Destination (192.168.20.55) <- |NAT| <- Source (138.47.99.99) <- Bob's server
3.1 From Bob's server:
ssh sourceuser@138.47.99.99
3.2 After the sucessful login to Source:
ssh localhost -p 19999
* the connection between destination and source must be alive at all time.
Tip: you may run a command (e.g. watch, top) on Destination to keep
the connection active.
On Wed, Feb 25, 2015 at 6:28 PM, Alex Elsayed <eternaleye@xxxxxxxxx> wrote:
> Jason E. Aten wrote:
>
>> Only tangentially related to nanomsg:
>>
>> What do you guys use to go through http-only (port 80) firewalls?
>>
>> I'd like to find a golang library capable of tunneling ssh through an http
>> firewall. I'm not worried about https, but strictly http.
>>
>> There must be some library already available/recommended?
>>
>> Thanks!
>>
>> Jason
>
> Corkscrew is a general tool for getting arbitrary TCP across HTTP/HTTPS
> proxies: https://en.wikipedia.org/wiki/Corkscrew_%28program%29
>
> The wiki page also lists two alternatives that function in a similar manner.
>
>
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