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Special Forums Cybersecurity restricting access... Post 2333 by alwayslearningunix on Tuesday 8th of May 2001 04:36:28 AM
Old 05-08-2001
ftpaccess

Thanks PxT, I am going to consider that for users who need a command prompt, I wonder if you could help me I've been working on this all night with no luck...

I want to chroot ftp users to their home dir, I have set up /etc and /bin in their directories, modified the /etc/passwd to:

user:x:500:500::/home/./user:/etc/ftponly

So they should chroot to /home and then chdir to their directory, and sit in that jail and not be allowed out of /home. I created passwd and group in ~etc.

The final bit of the plot was to add the guest ftp entry into /etc/ftpaccess. Which I did as:

guestgroup group

Where group is the group of the user.

However when I attempt to login as that user it says invalid username or password, if I take out this entry from ftpaccess I can login and am taken to /home/user, but I can escape from /home which I would expect as it clearly hasnt been specified as a chrooted guest ftp account, its only taking the directory to land me in from /etc/passwd.

Do you know what the problem could be? I've tried changing owners, permissions, messing around with ftpaccess, nothing seems to work.

Thanks for any help, from anyone.

Regards
alwayslearningunix
 

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CHGRP(1)						    BSD General Commands Manual 						  CHGRP(1)

NAME
chgrp -- change group SYNOPSIS
chgrp [-fhv] [-R [-H | -L | -P]] group file ... DESCRIPTION
The chgrp utility sets the group ID of the file named by each file operand to the group ID specified by the group operand. The following options are available: -H If the -R option is specified, symbolic links on the command line are followed. (Symbolic links encountered in the tree traversal are not followed). -L If the -R option is specified, all symbolic links are followed. -P If the -R option is specified, no symbolic links are followed. This is the default. -R Change the group ID for the file hierarchies rooted in the files instead of just the files themselves. -f The force option ignores errors, except for usage errors and doesn't query about strange modes (unless the user does not have proper permissions). -h If the file is a symbolic link, the group ID of the link itself is changed rather than the file that is pointed to. -v Cause chgrp to be verbose, showing files as the group is modified. The -H, -L and -P options are ignored unless the -R option is specified. In addition, these options override each other and the command's actions are determined by the last one specified. The group operand can be either a group name from the group database, or a numeric group ID. If a group name is also a numeric group ID, the operand is used as a group name. The user invoking chgrp must belong to the specified group and be the owner of the file, or be the super-user. DIAGNOSTICS
The chgrp utility exits 0 on success, and >0 if an error occurs. COMPATIBILITY
In previous versions of this system, symbolic links did not have groups. The -v option is non-standard and its use in scripts is not recommended. FILES
/etc/group group ID file SEE ALSO
chown(2), fts(3), group(5), passwd(5), symlink(7), chown(8) STANDARDS
The chgrp utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. BSD
March 31, 1994 BSD
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