Cyberduck sftp permission denied 20188/28/2023 ![]() That change the state of the filesystem, will be denied. R Places this instance of sftp-server into a read-only mode.Īttempts to open files for writing, as well as other operations This option is useful in conjunction with the The default is to use the user's homeĭirectory. ![]() Of the user being authenticated, and %u is replaced by the user‐ Is replaced by a literal '%', %h is replaced by the home directory May contain the following tokens that are expanded at runtime: %% Specifies an alternate starting directory for users. ![]() You can also control sftp-server through its switches -R and -d. See my answer to this U&L Q&A titled: " Restrict password-less backup with SFTP" for more details. The other technique you could exploit here would be to limit the SFTP connection so that it was chrooted into specific locations as root, based on which SSH key was used. Better still continue reading and combine this capability with chroot and read only access, to construct tighter restrictions and targeted access to specific locations as root. NOTE: Whomever accesses the server in this method would have cartes blanche access, so use it wisely. You'd still have a record of this connection in your syslog and/or secure.log files (assuming your distro provides this level of logging). # User backup's $HOME/.ssh/authorized_keys fileĬommand="/usr/libexec/openssh/sftp-server" ssh-dss AAAAC8ghi9ldw= would allow another system with the corresponding key to this pair to SFTP into this system as root. Am I wrong?īeyond what suggested in the comments above you could setup a dedicated SSH key pair just for this activity and add them to the root user's /root/.ssh/authorized_keys file limiting their scope to just a single command. This seems to be the same effect as using sudo to me. Should I concern myself with this when using Key based authentication or is this a trivial difference in security/logging? It seems like Key based authentication records user's serial number in the logs, and you can have multiple keys for the root user to identify each user. It seems to be a best practice to require login as a non-root user and then require use of sudo since the logs will record who was given escalated privileges for each command. I didn't understand how to use sudo and SFTP at same time. Currently, I use root user login directly, but password login is disabled. I understand how to do SSH Tunneling to admin the system services. I need this to work with Mac connecting to Ubuntu as well. Is there a way to keep sudo & key authentication. If the system requires sudo to perform root level commands, How do I get around this?Ĭan I create a way of bypassing sudo for SFTP only? I'm using SSH Key based authentication - rsa key on smart card. Please feel free to write back if you still have issues.I want to be able to use SFTP to edit files that require root permissions. By doing that the user will be restricted (chroot) to his home folder and when WinSCP tries to list the root "/" the content of the home directory will be listed since the root will be mapped to the /bucket/folder. Find your User, edit the configuration, select the bucket and optionally the home directory and click the restricted option. On WinSCP under Advanced Site Settings of your Session -> Environment -> Directories you can Uncheck the option "Remember last used directory" and also clear the "Remote directory" field so it wont connect to "/".Īnother option is to use logical directories or the Restricted option if you are using the AWS Transfer Console. If you are not using the restricted option (logical directories) for your User and you try to list the root "/" the operation will give an Access Denied if you do not have permissions to list all the buckets (s3:ListAllMyBuckets). Based on the error provided it looks like WinSCP is trying to list root "/" and it is failing.
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