01-11-2019
Quote:
Originally Posted by
gull04
The problem turned out to be the firewall had been turned back on by one of our offshore people, I had already stopped the service
In addition to what Don Cragun already said: how on earth can a user get the privileges necessary to turn on the firewall?? In a long (and rather depressing) life as a systems administrator i learned that admins should be like gods:
i am your root - thou shalt have no others besides me!
In AIX there is a file
/etc/nologin, which, when in place, prevents any login. (It is deleted automatically upon reboot, so it can't be forgotten.) Maybe there is something alike in RHEL, which you could incorporate to your deployment process to prevent these things? If not: how about killing
getty instead? That would also prevent new logins until a final reboot, which should perhaps be the last step in a customisation process anyway.
I hope this helps.
bakunin
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LEARN ABOUT NETBSD
nologin
NOLOGIN(5) BSD File Formats Manual NOLOGIN(5)
NAME
nologin -- file disallowing and containing reason for disallowing logins
DESCRIPTION
The file /etc/nologin, if it exists, causes the login procedure, used by programs such as login(1), to terminate. The program may display
the contents of /etc/nologin to the user before exiting.
This file is a simple mechanism to temporarily prevent incoming logins. As such, the file /etc/nologin is created by shutdown(8) five min-
utes before system shutdown, or immediately if shutdown is in less than five minutes. The file /etc/nologin is removed just before
shutdown(8) exits.
To disable logins on a per-account basis, see nologin(8).
The file /etc/nologin has no affect on the login procedure for the root user.
FILES
/etc/nologin The nologin file resides in /etc.
EXAMPLES
NO LOGINS: System going down at 18:22
SEE ALSO
login(1), ftpd(8), nologin(8), rshd(8), shutdown(8), sshd(8)
BSD
December 9, 2005 BSD