Re: SSH

On 7/4/06, RyAnZ <nocph@xxxxxxx> wrote:
Hi, sorry my English is not that good that's why I minimize my words.

Here are some details... I'm connecting from different network eth0 is
private 10.10.x.x and eth1 is public 203.x.x.x, no problem on connecting
internal but the external I cant connect. I tried telnet on port 22 the
results below:

SSH-2.0-OpenSSH_4.3

Protocol mismatch.


Connection to host lost.

I tried disabling the iptables still doesn't work, I copied my ssh_config
from core4 still doesn't work..

Any suggestion?

Thanks

-----Original Message-----
From: fedora-list-bounces@xxxxxxxxxx [mailto:fedora-list-bounces@xxxxxxxxxx]
On Behalf Of Jay Cliburn
Sent: Tuesday, July 04, 2006 9:39 AM
To: For users of Fedora Core releases
Subject: Re: SSH

On Tue, 2006-07-04 at 09:30 +0800, RyAnZ wrote:
> Hi Guys,
>
> I have a problem connecting on ssh2 I have a fresh install fedora core 5.
It
> jus doesn't work. No error.

More detail needed. Does the connection eventually time out? Are you
trying to connect to another machine on your LAN or on another network?
Can you cut and paste the connection attempt here? Have you run a
packet capture using, say, ethereal to see if the remote machine is
answering? Have you used the -vv option to ssh to be more verbose when
you try to connect?

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Are you connecting as a specific user from the external network. If
your logged in username is the same as the SSH valid username then you
are ok. If you are using the same username on all your machines
internally (or at least the same username on your SSH box and the one
you are using to connect with) then that would work no problem. But
if you are trying to connect and your username is one not found on the
FC5 SSH server, it will not work. You must specify the username. I
am wondering if you are trying to connect externally under a username
not found on the remote machine (and you are not specifying a specific
username to connect as). That would not work.

Example: Your FC5 SSH server has users john, mary, steve, and paul.
You are logged in on your remote machine as john. When you issue the
command ssh xxx.xxx.xxx.xxx it will try and connect to your SSH server
using the username john and prompt you for that username's password.
Where that is a valid username on the SSH server, it works. But if
you are logged in as nancy for example, then it won't work. You have
to use the command:

ssh username@xxxxxxxxxxxxxxx
where username is a valid user on the SSH server. Of course you can
do this even when logged in as john for example on your local machine
but you want to ssh to the user mary on the remote server. Then you'd
issue

ssh mary@xxxxxxxxxxxxxxx

Telnet would still provide the output you experienced above (but it's
an excellent tip to remember to check if a port is listening).

If you are already doing this then disregard my suggestion. Maybe it
will benefit someone else.

Jacques B.

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