How do I chroot a user to a directory?

Published by Charlie Davidson on

How do I chroot a user to a directory?

Restrict SSH User Access to Certain Directory Using Chrooted Jail

  1. Step 1: Create SSH Chroot Jail.
  2. Step 2: Setup Interactive Shell for SSH Chroot Jail.
  3. Step 3: Create and Configure SSH User.
  4. Step 4: Configure SSH to Use Chroot Jail.
  5. Step 5: Testing SSH with Chroot Jail.
  6. Create SSH User’s Home Directory and Add Linux Commands.

How do I jail a SFTP user?

The simplest way to do this, is to create a chrooted jail environment for SFTP access. This method is same for all Unix/Linux operating systems. Using chrooted environment, we can restrict users either to their home directory or to a specific directory.

How do you add a user to jail in Linux?

  1. Login as the root user. Type any one of the following command:
  2. Create the chroot jail. I’m going to set /home/jails/ directory to restrict an ssh user session to this directory:
  3. Set permissions.
  4. Install bash shell in $D.
  5. Add user to the the system.
  6. Configure sshd.
  7. Restart sshd service.
  8. Test it.

How do you detect chroot?

If the process reading /proc/1/mountinfo is chrooted to a directory on the global root filesystem, then an entry for / appears in /proc/1/mountinfo , but with a different mount id. Incidentally, the root field ( $4 ) indicates where the chroot is in its master filesystem. This is a pure Linux solution.

What port is sftp on?

port 22
Unlike FTP over SSL/TLS (FTPS), SFTP only needs a single port to establish a server connection — port 22.

What is sftp jail?

What is a sftp chroot jail? SFTP Chroot Jails are a simple and easy way of creating a secure area on your Linux system that can be used for transferring files. A SFTP chroot jail allows you to create a secure directory that confines a user to specific area.

How do you implement chroot?

Creating a chroot command jail

  1. Create a Directory. First, we will begin by creating a fake root directory at /home/chroot_jail using the mkdir command.
  2. Add Required Root Directories.
  3. Move the Allowed Command Binary Files.
  4. Resolving Command Dependencies.
  5. Switching to the New Root Directory.

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