On Sun, Sep 28, 2003 at 05:30:41PM -0400, Buck wrote:
> I have seen SSH referred to in several postings on the listservs.
> Is that what I want to study?

Yes.  Turn on the sshd service, ssh is great.  It stands for "secure
shell", in its most common use, where one might have typed "telnet
someserver.com" to do a text login, the smarter thing would be to type
"ssh someserver.com" and do an encrypted login.  At that point you
have a text prompt and can do all those text-based things, and not
even worry about someone listening in on your wireless connection.

But ssh gets better.  Once you are logged in over an ssh connection
you can do X Windows graphical stuff where you run the program on the
remote machine but the windows and buttons and all appear on the
machine you are sitting at.  (This can be slow over a slow
connection.)

And you can tunnel anything over an excrypted ssh link.

You can consider that ssh includes sftp (secure ftp) and scp (secure
copy).  rsync is a great way to copy multiple files from one machine
to another, and it can do all its work over an ssh connection.  For
unattended operations ssh can authenticate with a key file instead of
requiring a typed password.

If you really need to see the base screen and operate upon icons on
the desktop, use the Redhat menu, etc., you can use VNC (Virtual
Network Computing), do a man page on vncviewer and vncserver--but you
want to run your VNC session over an ssh tunnel.

So yes, go learn a lot of stuff (learning is fun) and make sure ssh is
on the list.


-kb

P.S.  ssh is a more complex protocol than telnet and so uses more more
complicated software.  This means it is more likely than simpler
software to have bugs, and some of those bugs will be security bugs.
Keep your software--including ssh--up to date.  ssh has had some
security recently, you want them.  Lots of smart, paranoid, and
careful use ssh and depend upon it for security, but they keep it up
to date.  Keep it up to date.  Give it more time and I think they will
stop finding bugs, but not yet.


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