dynamic user groups

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LEARN ABOUT FREEBSD

ftpchroot

FTPCHROOT(5)						      BSD File Formats Manual						      FTPCHROOT(5)

NAME

     ftpchroot -- list users and groups subject to FTP access restrictions

DESCRIPTION

     The file ftpchroot is read by ftpd(8) at the beginning of an FTP session, after having authenticated the user.  Each line in ftpchroot corre-
     sponds to a user or group.  If a line in ftpchroot matches the current user or a group he is a member of, access restrictions will be applied
     to this session by changing its root directory with chroot(2) to that specified on the line or to the user's login directory.

     The order of records in ftpchroot is important because the first match will be used.  Fields on each line are separated by tabs or spaces.

     The first field specifies a user or group name.  If it is prefixed by an ``at'' sign, '@', it specifies a group name; the line will match
     each user who is a member of this group.  As a special case, a single '@' in this field will match any user.  A username is specified other-
     wise.

     The optional second field describes the directory for the user or each member of the group to be locked up in using chroot(2).  Be it omit-
     ted, the user's login directory will be used.  If it is not an absolute pathname, then it will be relative to the user's login directory.	If
     it contains the /./ separator, ftpd(8) will treat its left-hand side as the name of the directory to do chroot(2) to, and its right-hand side
     to change the current directory to afterwards.

FILES

     /etc/ftpchroot

EXAMPLES

     These lines in ftpchroot will lock up the user ``webuser'' and each member of the group ``hostee'' in their respective login directories:

	   webuser
	   @hostee

     And this line will tell ftpd(8) to lock up the user ``joe'' in /var/spool/ftp and then to change the current directory to /joe, which is rel-
     ative to the session's new root:

	   joe	/var/spool/ftp/./joe

     And finally the following line will lock up every user connecting through FTP in his respective ~/public_html, thus lowering possible impact
     on the system from intrinsic insecurity of FTP:

	   @	public_html

SEE ALSO

     chroot(2), group(5), passwd(5), ftpd(8)

BSD
								 January 26, 2003							       BSD

UNIX for Dummies Questions & Answers