openssh unix dev - Oct 2018 - Simple ways to test ssh tunnel

Hello List,

I'm not enterelly sure that I'm on the rist place to ask this question,
sorry if not.
The question is simple, *how to test simply a ssh tunnel ?*

I just want to make sure the the tunnel i'm opening is letting information
goes through it without problem, and I want to avoid any other point of
failure when testing.

for example let's say I run

ssh -L 8080:localhost:11111 user at remote

What command could I then use to use this tunnel as simply as possible,
either on the client, the server or both.

Thanks,

Mathieu Westphal

On 5 October 2018 at 19:23, Mathieu Westphal
<mathieu.westphal at kitware.com> wrote:
[...]
> ssh -L 8080:localhost:11111 user at remote
>
> What command could I then use to use this tunnel as simply as possible,
> either on the client, the server or both.
On the client, "telnet localhost 8080".  If it connects, depending on
what's on the other end either you'll get a banner or it'll wait for
the client to send something.  If it speaks HTTP. you can type
something like "GET /" and it'll probably give either a page or an
error message.

-- 
Darren Tucker (dtucker at dtucker.net)
GPG key 11EAA6FA / A86E 3E07 5B19 5880 E860  37F4 9357 ECEF 11EA A6FA (new)
    Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.

On Fri, 5 Oct 2018, Darren Tucker wrote:
> On 5 October 2018 at 19:23, Mathieu Westphal
> <mathieu.westphal at kitware.com> wrote:
> [...]
> > ssh -L 8080:localhost:11111 user at remote
> >
> > What command could I then use to use this tunnel as simply as
possible,
> > either on the client, the server or both.
> 
> On the client, "telnet localhost 8080".  If it connects,
depending on
> what's on the other end either you'll get a banner or it'll
wait for
> the client to send something.  If it speaks HTTP. you can type
> something like "GET /" and it'll probably give either a page
or an
> error message.
You can also use netcat instead of telnet, or perhaps "openssl
s_client"
if your endpoint requires TLS.

-d