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Full Discussion: Prevent users logging in as root
Operating Systems Solaris Prevent users logging in as root Post 302202635 by Sepia on Thursday 5th of June 2008 10:49:37 AM
Old 06-05-2008
Prevent users logging in as root
I would like to know how to prevent users connecting to a server using SSH as root.

I would still like them to be able to login with their username and then change to su.

But I would like to prevent them logging in directly as root.

I have searched the forum and read that I should set PermitRootLogin to no.

I am using Solaris 10 and have opened 'sshd_config' to find the line 'PermitRootLogin' which is already set to 'no' but I can log in as username root.

Any ideas?

Thanks
 

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LEARN ABOUT REDHAT

login.krb5

LOGIN(8C)																 LOGIN(8C)

NAME

       login.krb5 - kerberos enhanced login program

SYNOPSIS

       login.krb5 [ -fF [username] ]

DESCRIPTION

       login.krb5  is a modification of the BSD login program which is used for two functions.	It is the sub-process used by krlogind and telnetd
       to initiate a user session and it is a replacement for the command-line login program which, when invoked with a  password,  acquires  Ker-
       beros tickets for the user.

       login.krb5  will  prompt  for a username, or take one on the command line, as login.krb5 username and will then prompt for a password. This
       password will be used to acquire Kerberos Version 5 tickets and Kerberos Version 4 tickets (if possible.) It will also attempt to run aklog
       to get AFS tokens for the user. The version 5 tickets will be tested against a local krb5.keytab if it is available, in order to verify the
       tickets, before letting the user in. However, if the password matches the entry in /etc/passwd the user	will  be  unconditionally  allowed
       (permitting use of the machine in case of network failure.)

OPTIONS

       -r hostname
	      pass hostname to rlogind.

       -h hostname
	      pass hostname to telnetd, etc.

       -f name
	      Perform pre-authenticated login, e.g., datakit, xterm, etc.; allow preauthenticated login as root.

       -F name
	      Perform pre-authenticated login, e.g.,for datakit, xterm, etc.; allows preauthenticated login as root.

       -e name
	      Perform pre-authenticated, encrypted login.  Must do term negotiation.

CONFIGURATION

       login.krb5  is  also  configured via krb5.conf using the login stanza. A collection of options dealing with initial authentication are pro-
       vided:

       krb5_get_tickets
	      Use password to get V5 tickets. Default value true.

       krb4_get_tickets
	      Use password to get V4 tickets. Default value true.

       krb4_convert
	      Use Kerberos conversion daemon to get V4 tickets. Default value false. If false, and krb4_get_tickets is true, then login  will  get
	      the  V5  tickets directly using the Kerberos V4 protocol directly.  This does not currently work with non MIT-V4 salt types (such as
	      the AFS3 salt type.)  Note that if configuration parameter is true, and the krb524d is not running, login  will  hang  for  approxi-
	      mately a minute  under Solaris, due to a Solaris socket emulation bug.

       krb_run_aklog
	      Attempt to run aklog. Default value true.

       aklog_path
	      Where to find it [not yet implemented.] Default value $(prefix)/bin/aklog.

       accept_passwd
	      Don't accept plaintext passwords [not yet implemented]. Default value false.

DIAGNOSTICS

       All diagnostic messages are returned on the connection or tty associated with stderr.

SEE ALSO

       rlogind(8C), rlogin(1C), telnetd(8c)

BUGS

       Should use a config file to select use of V5, V4, and AFS, as well as policy for startup.

																	 LOGIN(8C)
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