Re: Questions on Transparent Tunneling

[Aris Adamantiadis <aris@xxxxxxxxxxxx>]

Hi,

I think what you want is not possible. The originating IP address of
your tunnel will always be either the SSH client or the SSH server
depending on the direction of the proxying. It would be very hard to
change that information because it is not supposed to be tamperable
(Inside the OS' kernel).

I think your question is worth asking on a more general mailing list,
I'm afraid libssh is of no use for what you need.

Regards,

Aris
Le 23/10/13 21:32, Jeremy Brock a écrit :
> Hi Aris,
> 
>     Please forgive my ignorance, I am new to the ssh tunneling
> terminology.  I am trying to setup a tunnel from a windows client
> running Putty (or other openssh client) to an HPUX host running
> openssh.  I would like to pass plain text traffic across the tunnel to
> the HPUX server while preserving the client IP when the port forwarding
> is done at the HPUX side to itself (since it is the destination).
> 
>     I am currently able to tunnel with the following in putty, but
> unable to preserve my client IP when the forwarding occurs on the HPUX
> host :
> 
> 
> 
> 
> ~Jeremy
> 
> -- 
> 
> Jeremy Brock
> 
> Vital Soft, Inc
> www.vital-soft.com
> 
> On 10/23/2013 12:07 PM, Aris Adamantiadis wrote:
>> Hi,
>>
>> I don't understand what you want. SSH supports tcp forwarding, and yes
>> there's some metadata transfered about origin of the connection. (I
>> guess you speak of ssh -R behaviour).
>>
>> Aris
>>
>> Le 23/10/13 18:35, Jeremy Brock a écrit :
>>> Hi All,
>>>
>>>     Is possible with libssh, or openssh for that matter, to have a
>>> transparent tcp tunnel where the forwarded port traffic across the
>>> tunnel keeps intact the remote client ip address when received on the
>>> server side for logging purposes etc?
>>>
>>>     Thx!
>>>
>>>     ~Jeremy
>>>
>>
>