 | | | Root login fails when using serial dialup modem | Root login fails when using serial dialup modem 2007-11-29 - By Rick Stevens
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On Thu, 2007-11-29 at 07:34 -0500, Bill Jones wrote:
> Thanks for the reply Rick.
>
> There wasn't a usertty file and securetty did indeed have /dev/ttyS0 as
> an entry. We got around the issue by creating a user and then su to root
> after successfully logging in via the modem.
Ah, /etc/securetty should NOT have the "/dev/" bit in it...just "ttyS0".
The "/dev/" bit is assumed.
> Again, thanks for taking time to reply.
No problem.
> -- --Original Message-- --
> From: redhat-install-list-bounces@(protected)
> [mailto:redhat-install-list-bounces@(protected)] On Behalf Of Rick
> Stevens
> Sent: Wednesday, November 28, 2007 1:59 PM
> To: Getting started with Red Hat Linux
> Subject: Re: Root login fails when using serial dialup modem
>
> On Tue, 2007-11-27 at 23:11 -0500, Bill Jones wrote:
> > I'm trying to help someone configure their filesystems using remote
> > dialup but the root user login fails when I try to login after the
> > modem answers and provides the login prompt. I have ttyS0 in the
> > /etc/securetty file. RHEL 4 is the s/w version in question. It says
> > invalid login when I attempt root login. The same login and p/w works
> > from the system console. Does anyone have ideas what is causing the
> > login to fail?
>
> The first things to check are /var/log/messages and /var/log/secure to
> see what's going on. Specifically, verify that the tty being presented
> to login is, indeed, /dev/ttyS0. Sometimes the name gets mogrified
> (e.g. shows up as /dev/modem or some such nonsense).
>
> You should also check to see if you have an /etc/usertty file. If you
> do, check the content and verify there aren't any extra access
> restrictions set up.
>
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