r228152: anyone got the None cipher working with base OpenSSH?

[Jeremy Chadwick]

On Fri, Dec 02, 2011 at 05:51:03PM -0600, Adam Vande More wrote:
> On Fri, Dec 2, 2011 at 5:39 PM, Jeremy Chadwick <freebsd at jdc.parodius.com>wrote:
> 
> >  If the WARNING message that is output to stderr
> > bothers you, use -T.
> >
> 
> This says -T disables the NONE cipher:
> 
> http://www.psc.edu/networking/projects/hpn-ssh/none.php
> 
> I haven't looked at current patches so maybe doesn't apply.

No, you're correct -- use of -T disables the none cipher.

I only checked actual packets (for plain-text) with tcpdump when testing
the above **without** -T.  I found that -T disabled the warning message;
well duh, because it disables the none cipher.

TL;DR -- my above message ("use -T to disable the warning") is
absolutely wrong.  The WARNING message to stderr, when a tty is
allocated, cannot be disabled to my knowledge -- the -n flag should
inhibit it, and I imagine this is intentional so that admins can use
-oCipher=none for backups on LANs, etc..

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                   Mountain View, CA, US |
| Making life hard for others since 1977.               PGP 4BD6C0CB |