Questions tagged [chroot]
A chroot on Unix operating systems is an operation that changes the apparent root directory for the current running process and its children.
408
questions
0
votes
0
answers
83
views
PHP-FPM + Apache2 security
I have configured my server (an Ubuntu 22.04 machine) so that it is managed by Apache (v2.4.55) and php7.4-fpm. The current configuration allows every vhosts to be divided into specific php-fpm pools, ...
- 1
2
votes
1
answer
173
views
Use netns to bind programs to specific IP addresses
I have an IP address on my server, say, 192.168.0.3, I want to share in a net namespace, so to run apps there which will only be able to communicate to the internet using that 192.168.0.3.
I can "...
- 21
1
vote
1
answer
197
views
How can I set specific directory for different users in proftp?
Currently, when user A logs in proftp, he comes at his home directory /home/A, when user B logs in proftp, he comes at his home directory /home/B. I want to let user A come at /dir1 and let user B ...
- 83
0
votes
1
answer
432
views
Can't chroot users correctly with vsftpd
I used this tutorial to install vsftp.
Everything seems to work fine except for two things:
Even though I set local_root=/home/$USER/ftp the default location
when I use any ftp-client is /home/$USER.
...
- 115
0
votes
0
answers
71
views
Can you use ostree to manage chroots?
I've recently started managing a personal server running a fedora derivative. I really like the idea of ostree, but the toolbox seems to get in the way more than I'd like for the tasks I'm working on. ...
- 1
0
votes
1
answer
580
views
ubuntu 20.04 - ChrootDirectory in sshd_config wont work with tokens %h or %u
I am trying to lock users into their home directory using a dedicated group in the sshd_config. The section of my group looks as follows
Match Group sftponly
ChrootDirectory %h
X11Forwarding no
...
- 103
0
votes
0
answers
140
views
Command logging for chroot ssh users
I have a ubuntu server that allows users access via ssh.
When they log in they are contained to their chroot directory.
I'm looking for a way to log commands used by the users. I've tried using snoopy ...
1
vote
0
answers
50
views
Tilde (~) shortcut in chroot jail
I have set up a chroot jail with bash for an ssh user. The "true" path of the home directory is /home/jails/home/name, and the chroot directory is /home/jails. When the tilde ~ shortcut is ...
- 11
0
votes
1
answer
106
views
OpenSSH ChrootDirectory man page remark on safety
In the sshd_config(5) man page in my system I found this remark in the section about ChrootDirectory:
For safety, it is very important that the directory hierarchy be
prevented from modification by ...
- 101
1
vote
2
answers
296
views
Debian unattended (preseed) installation, access to audio card(s)
I'm using the preseeding feature in order to shape a custom Debian 10 x64 system.
Everything is happening well, except that during the late_command step, I'm running a shell script to configure and ...
- 143
0
votes
1
answer
74
views
monitoring real time file access in chroot system
I was wondering if it's possible to write a shell script that:
runs chroot for a given userspec and group
monitors/intercepts system calls all processes started, and what libraries they attempt to ...
- 1
0
votes
1
answer
2k
views
Allow SFTP access to one or several directories for several users
For some of my users, I need to allow them SFTP access to one or several directories.
Multiple users can have access to the same directory.
But for directories they don't have permission for, they can'...
- 1
0
votes
1
answer
180
views
Is there another way to restrict SSH user other than chroot jail?
I need to create a safe environment for a foreign SSH user that has to have very restricted access to our server. That is:
can only execute commands that are allowed
can only use specific software ...
- 11
1
vote
1
answer
176
views
chroot not able to start service - not found. What is missing?
I would like to run a service inside a chroot in a NetBSD 9.1 amd64 system.
The service runs if invoked from OS.
The service in question is dendrite-monolith-server. I just copied the file for ease ...
- 273
0
votes
1
answer
330
views
sftp with Jailkit Connecting to host failed (exit status 4)
I'm running Ubuntu Server 18.04 with Jailkit 2.21, wanting to allow chrooted scp/sftp access via password to some users.
The sftp client can authenticate OK, but then just disconnects with a "...
- 472
0
votes
1
answer
539
views
df shows low disk space. It includes a directory which uses mount --bind for chroot sftp
I've setup a chroot environment for sftp access (sftp only, no shell).
The sftp user needs rw access to a host directory. I mounted it via /etc/fstab
/var/www/html /home/sftp-user/jail/html none ...
- 101
1
vote
0
answers
176
views
Annoying sftp chroot again (Ubuntu 20.04)
I think I understand all of the moving parts of not allowing a chrooted user over sftp to write to their own home directory (/home/username), but instead to write to an enclosed directory (/home/...
- 11
0
votes
1
answer
652
views
SFTP Chroot write in chrooted /
Hey,
I'd like to write with the chrooted user in his / but i can't.
Example: i have /home/sftponly/ as ChrootDirectory
Inside has to be another Directory with Permissions to this User, otherwise i ...
1
vote
2
answers
3k
views
OpenSSH + Active Directory: allow sftp for a group while disallowing everyone else
My objective is to allow a given Active Directory group members to use OpenSSH SFTP in chroot, and deny access to SSH for them and all others that aren't members of that group, while still allowing ...
- 55
1
vote
1
answer
252
views
Performing an OpenSCAP Remediation via a chroot session -- "Can't perform remediation in offline mode" Error
I am attempting to perform an OpenSCAP remediation through a chroot session. My command is structured as follows:
oscap-chroot /mnt/chroot_fs \
xccdf eval \
--remediate \
--...
- 251
0
votes
1
answer
264
views
restrict access .ssh folder from the connected user
In complex setup where user connected to remote host using authorized private key, there is a .ssh folder with user settings and keys related to the remote host.
Is it possible to disallow the ...
- 101
0
votes
1
answer
2k
views
php exec returning 127 because /bin/sh is getting "Permission denied" in apache chroot
I have a php script that is trying to use exec (or shell_exec) to execute a binary on the system. The exec is failing with return code 127.
Return code 127 normally means command not found. So I made ...
- 1,169
0
votes
1
answer
2k
views
VSFTPD: set a user's default directory to NOT their chroot directory
I have a VSFTPD setup in which users are chrooted to their home directories. Standard stuff. But this requires all of their home directories to be unwritable to them (to avoid security issues.) No ...
- 113
1
vote
0
answers
44
views
Install Linux on a second disk from an already running Linux (RHEL 7.8) instance
I am trying to mount a second disk on a running Linux (RHEL 7.8) AWS instance, install a customized bootable Linux environment to it, and then change that disk to an AMI so we can boot new Linux ...
0
votes
1
answer
150
views
Configure multi-level sftp access
I'm setting up a sftp server where clients will only have read-only access. They will log into their chroot directories, which is fine, but I need an admin account that can access/write to those ...
- 1
1
vote
1
answer
2k
views
How to specify user home in sshd config?
I have my sftp users chrooted into /var/www and I would like for them to be automatically moved into their directory. I found this answer which helped me a lot: Chroot SFTP - Possible to allow user to ...
- 144
0
votes
1
answer
921
views
AWS EC2 Linux restrict SFTP user to their home directory when users connect from WinSCP
I'm working on a solution to restrict the user to the home directory or a specific directory.
I need to restrict a user for below scenario,
we have multiple Wordpress installation in webroot /var/www/...
- 1
1
vote
1
answer
366
views
PHP-FPM chroot - one pool for all nginx virtualhosts
Now we have multiple virtualhots (nginx) under one php-fpm pool. We would like to use it same way with chroot.
Chroot directive is absolute path /var/www, but chdir should be /[domain]/httpdocs
Is it ...
- 285
0
votes
0
answers
23
views
Setting up account to upload to a website subdirectory
I need to setup a stfp account on Ubuntu 18.04 that meets the following requirement:
Can upload to subfolder of website i.e. example.com/subfolder/
Uploaded files belong to www-data group so are ...
- 243
2
votes
0
answers
331
views
Setting up virtual users with vsftpd
I'm trying to set up virtual users for an FTP server in a Linux box, but I'm not sure if the server I've picked up (vsftpd) can do what I need. My requirements are:
The FTP accounts are inside a ...
- 151
1
vote
0
answers
75
views
KSH/Bash History for jailed SSH users
How can I keep a history of activities for chroot'd SSH (not SFTP) users?
I've tried:
created a .sh_history in their home with the proper permissions
created a custom $HISTFILE in .profile and in its ...
- 127
0
votes
0
answers
1k
views
Running docker from within a chroot
I am trying to build a distro for RaspberryPi which ships with an aarch64 chroot running docker.
For this to work, I need docker to run within a chroot.
I am basing of rasbian, which is distributed ...
- 435
0
votes
1
answer
896
views
Why does internal-sftp verbose logging not include rename, move and delete operations?
I have configured a CentOS 7.7 installation to use the internal-sftp subsystem and to chroot a specific user in to a particular folder. I want to enable logging, so I configured sshd like this:
...
- 135
1
vote
1
answer
3k
views
Restricting SFTP users (OpenSSH-based) to a custom port only
I understand that there have been tons of other threads on the Internet on allowing OpenSSH SFTP connections on a custom port. I've hit them, not all, but a lot. And have not been able to make it work ...
- 113
0
votes
0
answers
328
views
Allow SCP/SSH to a chrooted environment only?
Is there a way to do this without installing a package like rssh or scponly, as they seem woefully out of date and full of security problems?
Is there any newer tool I could use? ssh is an optional ...
- 253
2
votes
1
answer
907
views
Chrooted SFTP user can't login
I'm trying to configure a user who will only be able to access to an specific directory. I've configured a Chroot jail in SSH and changed its home directory, but configuring the internal-sftp with ...
- 23
0
votes
1
answer
2k
views
Execute half of the %post section of a kickstart in a nochroot environment and the other half in a chroot environment
I am trying to execute a script that performs certain security configurations on my recently installed system. Much of the script refers to files starting with / as the base directory which presents ...
- 115
1
vote
0
answers
302
views
How do I remove a kernel package from an image chroot if it's the kernel running on my build host?
I am trying to build a custom image using diskimage-builder, and amongst other things, that tool updates all the packages within the image to the latest version, including the kernel. It also uses ...
- 11
0
votes
1
answer
999
views
LocalForwarding on a SSH connection from my desktop client to a CHROOTED user in an LXD container
I currently have a proxified web host setup for local development, yet I'm trying to make it a proper (documented) setup so I can deploy it on practically any VPS hosting.
Currently everything else ...
- 1
1
vote
2
answers
1k
views
Configure cron jobs for the chrooted user
I've configured chrooted SSH user on CentOS 7. Mounted /proc, /dev, /dev/pts to the user and installed required packages. And now I want to allow cron jobs for this user. How can I solve the task?
...
- 11
2
votes
1
answer
2k
views
Ubuntu root password reset
I have a dedicated server that i've just setup at Hetzner. I've done the stupid thing of not changing the temp password they give you and disconnected from the SSH session. They don't send nor store ...
- 165
0
votes
0
answers
393
views
Issue Hardlink/Junction not working when chroot all users to c:/share dir in Windows OpenSSH Server 2019
Issue Hardlink/Junction not working when chroot all users to c:/share dir in Windows OpenSSH Server 2019.
Link Created
mklink /d E "E:"
mklink /d F "F:"
Entry in sshd_config file
ChrootDirectory c:/...
1
vote
1
answer
281
views
Jailkit/Chroot - Allow Less and More
I have the need to add the LESS and MORE commands to a jailed-user. I've attempted the following and can't quite get it to work:
# which less;which more
/usr/bin/less /usr/bin/more
Now that I ...
- 165
0
votes
2
answers
1k
views
Publish network services using Systemd machinectl
TL;DR: How to expose network services to the host through machinectl/nspawn containers?
I'm trying to make things perfectfor my setup, i.e. installing my services in separated chroot instances.
To ...
- 498
3
votes
1
answer
5k
views
chroot, gpg-agent, and Ubuntu 18.04
For SFTP access to my server, I have created a sftp user that is limited to a working directory by chroot.
Match User sftp-user
AuthorizedKeysFile /home/sftp-user/.ssh/authorized_keys
...
- 880
0
votes
2
answers
1k
views
vsftpd with chroot_local_user requires client certificate
When setting up my FTPS server I want to enable chroot_local_user. When disabled everything works fine. If I enable this however, WinSCP fails to connect and claims I need a client certificate to ...
- 35
2
votes
0
answers
241
views
internal-sftp on chroot jail disconnects with status 1?
Server: Ubuntu 18.04.1 LTS
SSHD: OpenSSH_7.6p1 Ubuntu-4, OpenSSL 1.0.2n
I have created a test user sftpuser and sftp group to try logging in through a WinSCP client, as a start. In sshd_config I ...
- 21
0
votes
1
answer
514
views
OpenSSL-related linker error while building PHP 5.3.3
While trying to build PHP 5.3.3 on Debian jessie (save yourself some sanity by not asking why) with OpenSSL extension enabled, I encountered undefined reference to symbol 'X509_free@@OPENSSL_1.0.0' in ...
- 213
0
votes
1
answer
1k
views
Segmentation fault when building centos 5 chroot [closed]
For some legacy application I decided to use chroot with CentOS 5.
I did install CentOS 5 on virtual machine, then I boot virtual machine with live CD and using tar, I "copied" the files from the ...
- 804
0
votes
1
answer
1k
views
mariadb in chroot gives Access denied for user 'root'@'localhost' even though password is set
I have a script that runs mariadb in a chroot, its a qemu-arm-static rasoberrypi chroot but I don't that that should change much.
The script installs and then sets the password for mariadb root user, ...
- 435