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Full Discussion: disallow change directory
Operating Systems AIX disallow change directory Post 302590933 by kwliew999 on Wednesday 18th of January 2012 04:39:05 AM
Old 01-18-2012
disallow change directory
Dear all expects,
I have a security problem that I would like to resolve.
I need to create a user ID in my AIX 5.3 environment and to point the login to a specific directory for FTP purposes. There is only 2 directories that I can allow the user ID to perform read/write. I would like to prevent the user ID to go other places for read / writing..

User ID : TestFTP
Home Directory : /home/TestFTP
/home/TestFTP/.profile : cd /data06/ABC01

Thus, it ends up sign in to /data06/ABC01.
It should be allowed to read/write on /data06/ABC01 and /data06/ABC01/ABC01_BAK.

Other than that, it cannot cd .. to go back to /data06 or it cannot cd to any other directories.

May I know how to create such as ID?

Thanks.
 

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LEARN ABOUT OPENSOLARIS

ftpusers

ftpusers(4)							   File Formats 						       ftpusers(4)

NAME

       ftpusers - file listing users to be disallowed ftp login privileges

SYNOPSIS

       /etc/ftpd/ftpusers

DESCRIPTION

       The ftpusers file lists users for whom ftp login privileges are disallowed. Each ftpuser entry is a single line of the form:

	 name

       where name is the user's login name.

       The FTP Server, in.ftpd(1M), reads the ftpusers file. If the login name of the user matches one of the entries listed, it rejects the login
       attempt.

       The ftpusers file has the following default configuration entries:

	 root
	 daemon
	 bin
	 sys
	 adm
	 lp
	 uccp
	 nuucp
	 smmsp
	 listen
	 nobody
	 noaccess
	 nobody4

       These entries match the default instantiated entries from passwd(4). The list of default entries typically contains the superuser root  and
       other administrative and system application identities.

       The  root entry is included in the ftpusers file as a security measure since the default policy is to disallow remote logins for this iden-
       tity. This policy is also set in the default value of the CONSOLE entry in the /etc/default/login file. See login(1).  If  you  allow  root
       login  privileges  by  deleting the root entry in ftpusers, you should also modify the security policy in /etc/default/login to reflect the
       site security policy for remote login access by root.

       Other default entries are administrative identities that are typically assumed by system applications but never used for  local	or  remote
       login,  for  example sys and nobody. Since these entries do not have a valid password field instantiated in shadow(4), no login can be per-
       formed.

       If a site adds similar administrative or system application identities in passwd(4) and shadow(4), for example, majordomo, the site  should
       consider including them in the ftpusers file for a consistent security policy.

       Lines that begin with # are treated as comment lines and are ignored.

FILES

       /etc/ftpd/ftpusers    A file that lists users for whom ftp login privileges are disallowed.

       /etc/ftpusers	     See /etc/ftpd/ftpusers. This file is deprecated, although its use is still supported.

       /etc/default/login

       /etc/passwd	     password file

       /etc/shadow	     shadow password file

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWftpr			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |See below.		   |
       +-----------------------------+-----------------------------+

       The interface stability for /etc/ftpd/ftpusers is Volatile. The interface stability for /etc/ftpusers is (Obsolete).

SEE ALSO

       login(1), in.ftpd(1M), ftpaccess(4), ftphosts(4), passwd(4), shadow(4), attributes(5), environ(5)

SunOS 5.11							    1 May 2003							       ftpusers(4)
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