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--- tech:monter_un_serveur_sftp_chroote_avec_openssh [2025/09/18 15:14] – Jean-Baptiste
+++ tech:monter_un_serveur_sftp_chroote_avec_openssh [2026/06/07 19:12] (Version actuelle) – modification externe 127.0.0.1
@@ Ligne 1: / Ligne 1: @@
+<!DOCTYPE markdown>
+{{tag>SFTP chroot SSH}}
+# Monter un serveur SFTP chroote avec OpenSSH
+Voir : https://michauko.org/blog/sftp-chroot-et-pas-de-ssh-bloquer-un-utilisateur-dans-un-repertoire-1099/
+Voir aussi :
+* [[draft-monter-un-serveur-sftp-ssh|Monter un serveur SFTP avec ProFTPd]]
+* [[SSH SFTP chroot]]
+~~~bash
+mkdir -p /chroot/shared/
+chown root:nsc /chroot
+chmod 750 /chroot
+useradd sftpuser -M -d /dev/null -s /sbin/nologin
+# useradd is a low level utility for adding users. On Debian, administrators should usually use adduser(8) instead.
+echo "/mnt/shared/ /chroot/shared/    none _netdev,bind 0 0" >> /etc/fstab
+~~~
+`/etc/ssh/sshd_config`
+~~~
+# Subsystem sftp /usr/lib/openssh/sftp-server
+Subsystem     sftp   internal-sftp
+Match User sftpuser
+        ChrootDirectory /chroot
+        ForceCommand internal-sftp
+        AllowTcpForwarding no
+        GatewayPorts no
+        X11Forwarding no
+        PermitTunnel no
+        AllowAgentForwarding no
+        PermitTTY no
+~~~
+~~~bash
+mount /chroot/shared/
+systemctl restart sshd
+systemctl status sshd
+~~~
+## Autres
+The simplest way is to create some script that would take care of that. Add
+~~~
+Match User test1
+  ForceCommand /path/to/your/script.sh
+~~~
+And your script will basically run whatever the user wants, unless it is request for SFTP:
+~~~bash
+#!/bin/bash
+if [[ "$SSH_ORIGINAL_COMMAND" =~ .*sftp-server.* ]]; then
+   echo "SFTP not allowed"
+   exit 255;
+else
+   exec "$SSH_ORIGINAL_COMMAND"
+fi
+~~~
+FIXME