How do i stop a vsftp users from browsing other directories.?

I have done this on a Sun UNIX system where each user could log in and access their own files, but could not access anyone else's files.

First I created directories under what you have called /var/www with copies of certain system files. Typically, all the files in /bin that are needed to support the FTP process would be copied into /var/www/bin. Similarly, and files in other system directories were copied. All these system files were owned by root and were not writable by other users.

Next, I changed the ftp login program so that it performed a chroot to the parent directory of all the accounts. In your case /var/www and then exec'ed the original ftp program what was now located in /var/www/bin (or wherever it has to be stored).

Each user sub-directory had permissions so that only that user could access the contents of the sub-directory and consequently any lower level sub-directories.

The final step was to have a root level daemon that ran in the background and allowed the system to move information between users or to or from system processes running on the server. Since the root level daemon was not using chroot, it could access any files anywhere in the system.

FTP users could see other users' top level directories, but could not get into them. Also, as far as they were concerned the real directory /var/www was actually their / directory (because of the chroot), so they could not go up to the real superior directories. Even the binary executables in directories such as /var/www/bin did not have read access so they could not download those files.

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