Search

Language:  
Search for:

Available article translations:

Backup signing in Plesk 11.5

APPLIES TO:
  • Parallels Plesk Panel 11.5 for Linux
  • Parallels Plesk Panel 11.5 for Windows

Information

Parallels Plesk Panel Micro-Update #3 for Plesk 11.5 introduced a new security measure: signing of backup files. This article addresses questions that may arise due to this feature and explains the customer impact.

What are backup signatures for?

Backups are signed with a server-specific key in order to ensure that the backup is made on the same server and has not been modified. This security measure protects against attempts to restore forged backups in order to increase limits or gain permissions.

When are backups signed?

Backups are signed in the following cases:

  • The backup is created in the FTP server repository. 
  • The backup is downloaded from the Parallels Plesk Panel interface.
  • The backup is created using the pleskbackup command-line utility, even if the argument for -output-file is a local file.
Backups created on the server and stored in the local repository are not signed.

When is a backup signature verified?

A backup signature is verified in the following cases:

  • The backup is uploaded through the control panel.
  • The backup is restored from FTP.
  • The backup is copied from the Personal FTP repository to the Server Repository.
  • The backup is restored from a single file using the pleskrestore command-line utility.

What happens when the server cannot verify a backup signature?

Uploading or restoring of backups with absent or incorrect signatures is not allowed for non-administrator accounts. The Plesk administrator is asked for an additional confirmation when an unsigned or unverified backup is uploaded or restored.

How will the introduction of backup signature checks impact my customers?

1. All backups uploaded to FTP or downloaded through the control panel before 11.5 MU#3 was installed will be processed as unsigned. This means the following:

  • Non-administrators cannot restore such backups from Personal FTP Repository.
  • Non-administrators cannot upload backups downloaded before installing 11.5 MU#3 to Server Repository.
  • Non-administrators cannot restore their parts of full server backups that are not signed or have incorrect signatures (such backups may be uploaded by the administrator).

2. The administrator has to confirm the uploading or restoring of unsigned backups or backups with incorrect signatures in the control panel interface and in the command-line utilities:

  • pleskrestore will not start to restore a backup with an incorrect signature unless you add the -ignore-sign option.
  • The I want to restore this backup despite the fact that it is modified check-box should be selected on the Backup Details and Upload Backup File from Local Computer to Server Repository pages in an Administrator control panel session.

3. If a backup on Remote FTP Repository has an incorrect signature, it cannot be moved to Server Repository by the Copy to Server Repository button, not even by the administrator. The product development team is working on a permanent solution for this. The current workaround is to download the backup from the FTP server and then upload it through the Plesk interface to Server Repository.

I don't need it! How can I disable this feature?

Signature checking may be turned off through the /usr/local/psa/admin/conf/panel.ini configuration file (%plesk_dir%\admin\conf\panel.ini on Windows):

[pmm]
allowRestoreModifiedDumps = on
In this case, the signature will be checked, but will not block any operation.




e31a9debb6ab77383997c35d0dcf4649 56797cefb1efc9130f7c48a7d1db0f0c 49af2da0f2dd4c81e962790bbbd0c2b4 5fc602d72ea565f353b9320e2ef62a1b bbe0373935bc886984e30ddeb0b46919 6d7d554563b7b77c7f8e8a903a4c0630 5d735c0e028ee5b991e4fb80d34fb87f c7658ac2f68d6572a213687c1077afff

FEEDBACK
Was this article helpful?
Tell us how we may improve it.
Yes No
 
 
 
 
 
 
Desktop Virtualization
- Parallels Desktop 8 for Mac
- Parallels Transporter
- Parallels Desktop Switch to Mac Edition
- Parallels Desktop for Mac Enterprise Edition
- Parallels Management-Mac for Microsoft SCCM
Server Virtualization
- Parallels Cloud Server
- Parallels Containers for Windows 6.0 Beta
- Parallels Virtuozzo Containers
Automation
- Parallels Automation
- Parallels Automation for Cloud Infrastructure
- Parallels Business Automation Standard
- Parallels Virtual Automation
- Parallels Plesk Panel Suite
- Web Presence Builder
- Parallels Plesk Automation
- Parallels Small Business Panel
- Value-added Services for Hosters
- Parallels Partner Storefront
Services & Resources
- Cloud Acceleration Services
- Professional Services
- Support Services
- Training & Certification