Hi,

I am using ubuntu 16.04 and I want to create a user which can only access its home directory.

I have followed the steps mentioned in below url :

https://www.tecmint.com/restrict-ssh...chrooted-jail/

https://www.digitalocean.com/communi...ific-directory

but it won't work and it makes user not able to login to the server.
kindly help..

Thanks

I don't think anyone is going to be able to help without more information. Both links you posted are multi-step and you failed to indicate at which step it failed or for that matter, which link tutorial you used. "It won't work" is not helpful so if you want help, details.

When I added below lines

Subsystem sftp internal-sftp
Match group sftpusers
ChrootDirectory %h
ForceCommand internal-sftp

and restart the service of sshd i am not able to login to server via ssh or sftp.

it gives error of connection failed.

Hi dushyantg,

Yancek (above post) has a point - more details would still help.

By "limiting access to home", do you mean read-only elsewhere, or no permissions at all (i.e. can't even view directory contents ...) ? Explaining what you are trying to do this for would also help.

I suppose changing the permissions on the entire file system to 700 would allow only root to view, list, read or write in any directories other than /home/$user$ ... I guess using the appropriate masks in fstab would be the easiest way to do this (probably 077) ... Still - we're shooting in the dark here until you provide more context.

Cheers.

It sounds like the permissions are incorrect. If the chroot is writable by the user, then any amount of mischief is possible. The chroot must be owned by root and only writable by root, or else the OpenSSH server will refuse to let that user log in. Same for all the directories above it.

If you have the following lines appended to /etc/ssh/sshd_config

Then it will chroot the SFTP session to the users' home directory. So that directory has to be owned by root and not writable by anyone, not even the user. There are two ways to deal with that.

1) You can have root create files and subdirectories and have them owned by the user. That has the disadvantage that anything in the users' directories has to be created manually by root.

2) You can create a subdirectory in the chroot with the users' name and otherwise work as normal. The disadvantage is that some think it looks funny to those outside the chroot. Then you can chroot to the home directory and start the session within the subdirectory.

I have created a user XYZ and its having its home directory now I want XYZ to have full access on its home directory and he/she can have 777 permission on that but rest of all files it will not have even 700, I mean that user can't access rest of the files/directories not even read permission.

I have created a user XYZ and its having its home directory now I want XYZ to have full access on its home directory and he/she can have 777 permission on that but rest of all files it will not have even 700, I mean that user can't access rest of the files/directories not even read permission.

Which approach are you trying #1 or #2 above?

The chroot directory must not be writable by anyone other than root. Which permissions are there currently?