Re: Dial-in mgetty line security
At 05:47 PM 11/14/99 -0800, Michael W. Shaffer wrote:
><> Is this adequate to protect from random dialers who might
>stumble on the modem tone and try logging in to this machine?
I think war dialers are a thing of the past really.
><> Are there any other routine actions like this I should take
>to protect modem lines like this used only for occasional remote
Set adminname to a random sequence so it will be extremely hard to guess.
Enable failed login tracking. Set LOG_UNKFAIL_ENAB, FAILLOG_ENAB, and
FTMP_FILE to yes. All in /etc/login.defs. You could make a script to email
you if there are any failed login attemps. That way you would be alerted to
a potential attack. Also you can use non-standard terminal settings so
anyone trying to connect who isn't in-the-know will fail. e.g. 7-E-1,
At 02:48 PM 11/15/99 +1100, Roland Gerlach wrote:
>Are you aware that entering adminname and any password will cause
>login to re-prompt for the username which will defeat your mgetty
>/bin/false security mechanism?
You can set the number of login retries to 0. In /etc/login.defs.
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