Ssh missing 'login as' prompt
m.seaman at infracaninophile.co.uk
Sat Nov 1 02:32:31 PST 2003
On Sat, Nov 01, 2003 at 01:07:05AM -0600, Mike Loiterman wrote:
> Daniel <mailto:daniel at hawton.org> wrote:
> > ssh -l (username) (host)
> I understand that you can use the -l command to specifiy a user to
> login as.
You can't with ssh(1) -- it just doesn't work like that.
ssh(1) will try and log you into an account with the same name as your
current login by default, or you can log into an atlternate username
% ssh -l username remotehost
% ssh username at remotehost
> I want the person ssh'ing into the server to have to enter a valid
> username before they get a password prompt.
It's also the case that it's a bad move in security terms for the
system to ever let on to an attacker that their attempted login failed
because they got a correct username but the wrong password. That
should be indistinguishable from attempting to log in to a
non-existent username. The principle being that once you know what
usernames exist on a server, you can target your attempts to crack the
passwords a lot more efficiently.
Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks
PGP: http://www.infracaninophile.co.uk/pgpkey Marlow
Tel: +44 1628 476614 Bucks., SL7 1TH UK
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