Plesk Help HUB


2016-11-16 12:42:26 UTC


2017-08-10 04:00:50 UTC


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Plesk Help HUB

Applicable to:

  • Plesk

Since Plesk 12.5 we started developing Plesk Documentation and Help Portal where you can find documentation , release notes , tutorials and FAQ sections.

Here you can share your suggestions about new Plesk features or current functionality.

Table of contents

Plesk General Questions

  • Is it possible to downgrade Plesk?
    No. Plesk does not support downgrade. It is not possible to perform a migration to lower version. Plesk backup also cannot be restored on an older Plesk version.

  • What are the new features that provide WordPress Toolkit 2.0?
    The new generation of WordPress Toolkit adds a lot of capabilities and really deserves separate announcement – most important of which is support for cloning and sync. Also, the following feature: custom plugin and theme support, automatic backup of instances, plugin autoupdater

  • Does Plesk Premium AV secure the whole server?
    No. Plesk Premium AV checks only email messages. Plesk does not offer any complete antivirus protections.

  • Does Plesk support DKIM/DMARC?
    Yes. Starting Plesk Onyx 17.0, we were capable of signing outgoing mail, so it is not rejected by recipients at Gmail for example and our users are not mistakenly taken for spammers. Starting Plesk Onyx 17.5, we can verify incoming email also, so our users will receive less spam emails.

  • Will Customer & Business Manager work after upgrade to Onyx?
    No. Plesk Onyx does not support CBM. The latest version that supports CBM is Plesk 12.5.

  • Will Web Presence Builder work after upgrade to Onyx?
    Yes. Plesk Onyx supports Web Presence Builder along with Web Business Builder.

  • Why is WordPress management toolkit not shown in Plesk GUI?
    WordPress Toolkit is absent in GUI because there is no WordPress toolkit add-on on your license #213941545

  • Which is lowest version of WordPress is supported by WordPress Toolkit?
    WordPress Toolkit works with WordPress 3.7 or newer #213904485

  • Which PHP version does Wordpress Toolkit require?
    Wordpress Toolkit requires PHP 5.3 version or higher. #213949685

  • Is mail interception prevention feature is enabled by default?
    No, interception prevention feature is not enabled by default. To enable it, follow Plesk documentation

  • Why ModSecurity or Fail2Ban management tool is not shown in Plesk GUI?
    Most probably it was not installed or it was not included in your license. Also please note that Fail2ban is not available on Windows platform. #213415589

  • How to suggest a new feature for next Plesk version?
    You can suggest new features and vote for other features on . See KB article #213406329 .

  • Is it possible to restore single file or database from Plesk backup?
    It is possible to restore a single object, since Plesk 12. For more information please refer to Plesk documentation

  • Why does Fail2Ban not block connections?

    Fail2Ban may not work because of VE/VPS iptables records count reached 'numiptent' . See KB article #213929085 .

  • What Plesk editions are available and what difference between them?

    Plesk is shipped in four editions optimized to specific needs: Web Pro, Web Host, Web Admin and Web App Editions
    Additional information available in the KB article #213903085

  • What license types does Plesk have?

    Each Plesk edition license is available in one of two platform types:
    - VPS - fits any virtualization platform: Virtuozzo (Virtual Private Server (VPS) Containers and VMs), VMware, Xen, Hyper-V, Virtuozzo hypervisor etc.
    - Dedicated - can be installed on either a VPS or on a dedicated server.
    see KB article Plesk available editions and differences between them

  • Why is Outgoing Mail Control management tool not shown in Plesk GUI?
    Outgoing Mail Control is not shown when it was either: not enabled or not supported in your current license or you have 'Merak' mail server installed, or the server components list was not re-read after the feature was installed. #213414809

  • How to detect that mailbox/domain or subscription are blocked by Outgoing Mail Control because of limits?
    Please see KB article #213387729

  • Why messages are being blocked by Outgoing Mail Control even if mailbox has unlimited message count
    Domain or parent subscription limits are exceeded. See How Limits Work

  • Why is selective restore not available for some backups?
    Selective backup restore is not available for backups created with previous Plesk version, prior Plesk 12. Such backup files can not be converted to an appropriate format.

Compatibility with 3rd-party software

  • Supported 3rd-party software list is available in Plesk release notes:

  • Which operating systems are supported by Plesk?

  • Does Plesk support MySQL Community server?
    Yes. MySQL Community server can be used for clean Onyx installation or with already installed Onyx.

  • Does Plesk support Docker, Node.js, DNSSec, GIT?
    Yes. Plesk Onyx supports all these features. More Q/A regarding these features can be found here

  • Does Plesk support ASP.NET 1.1?

    ASP.NET 1.1 is supported by Plesk. To install it on Microsoft Windows 2008 with IIS 7, follow instructions from the KB article #213392489 .

  • Does Plesk support ASP.NET 4.5/4.6?

    ASP.NET 4.5 is supported since Plesk 11.x. However, the version reported by both Plesk and IIS will be "4.0," as .NET 4.5 Framework is an iterative update to .NET 4.0 Framework. Details are available in the KB article #213919485. ASP.Net 4.6 is supported since Plesk 12.0 with the latest updates.

  • Does Plesk support ColdFusion? Which versions of ColdFusion are supported?

    Starting from Plesk 12.5 Adobe ColdFusion scripting engine is not supported.
    Plesk 12 and earlier supports the Adobe ColdFusion scripting engine. The list of supported versions can be found in the KB article #213921685 . A link to the installation instructions is available in the KB article #213383089 .

  • Does Plesk support Percona database server?

    Percona database server is not supported. Its presence on the server may cause Plesk to malfunction and for the upgrade to fail (see KB article #213391209 ).

  • Does Plesk support Apache worker MPM?

    Plesk does not support Apache worker MPM and its use may cause problems with the PHP engine. Details are available in the KB article #213415609 .

Server administration and maintenance

  • Is it possible to install custom apache version?
    No. Plesk supports only original versions that come from OS repository.

  • Is it possible to install custom nginx version or from OS repository?
    No. Plesk uses its own sw-nginx package. Currently, it is not possible to use default one.

  • How to upgrade MySQL 5.5 to 5.6?
    The solution is available in the following article #213403429 .

  • How to enable gzip compression on nginx
    The solution is available in the following article #213380049 .

  • Is it possible to upgrade MailEnable on Plesk server?

    Yes, MailEnable can be upgraded. Details are available in the article #213401609 .

  • How to get password for MySQL database administrator account in Plesk on Windows?

    Since Plesk 11 encrypts all passwords stored in its database, the only way to get administrative access to the MySQL database server is to change the password manually (see KB article #213944845 ).

  • How to make sure that the server is secured and prevent threats and unauthorized access?

    Important tips on the prevention of security threats as well as a list of the important issues are available in the article #115000626925 .

  • Is it possible to upgrade OS on the server?

    An in-place upgrade of the OS on the server is supported only since Plesk 12.5 for several OSes. (see KB article #213946265 ).

  • Is it possible to run more than one version of PHP on the server?

    Plesk for Windows supports multiple versions of PHP on the server and allows you to choose the version of PHP engine on a per-domain/per-subscription basis. This feature is also available on the most Linux systems since Plesk 12.5 (see KB article #213909265 ).

  • How to install PHP 5.2 alongside PHP 5.3 on Plesk for Linux servers?

    Plesk multiple PHP versions allow this. Instructions are available in the KB article #213909265 .

  • Will installation of PHP module or update of PHP affect Plesk?

    No. Plesk uses its own PHP and updates of PHP used by customers' sites will not affect Plesk.

  • Which Ports Need To Be Opened for all Plesk Services to Work with a Firewall?

    The list of ports that should be available for incoming/outgoing connections on the Plesk server is available in the KB article #213932745 .

  • How to add new programs into chrooted shell environment?

    The script to add new programs into the chrooted environment of the virtual host is available in the KB article #213909545 .

Common Plesk questions

  • The SSL certificate used by Plesk has expired. How can it be renewed?

    In order to renew expired certificate please check article #213402729

  • Strange IP addresses in Action Log in "Plesk component upgrade" action properties are shown. What are they?

    In short, such records can be safely ignored. For more information, check the article #213937485 .

  • How to reconfigure PleskControlPanel website in IIS?

    Reconfiguration of a Plesk website in IIS can be done via the websrvmng utility (see article #213401769 ).

  • How to get/set Plesk administrator's password?

    Articles #213381869 (Linux) and #213410689 (Windows) provide detailed instructions on how to get or set the Plesk administrator's password.

  • How to install the latest Micro-Updates and verify that Plesk is updated?

    It is important to keep Plesk up-to-date with the latest security and functional fixes. Plesk is set up to apply Micro-Updates automatically since version 10.3. Instructions on how to configure automatic updates are available in the Plesk Administrator's Guide , while the Knowledgebase article #213385609 contains information on how to apply Micro-Updates manually.

  • How to uninstall Plesk?

    Plesk for Linux can be uninstalled with the script from the KB article #213907125 . However, it is not recommended to remove Plesk. It is better to redeploy the whole server.
  • How to change Plesk default port?

    Changing the port of Plesk is not recommended, as it may disrupt integration with other products. However, it is possible to hide it using the following instructions #213945625 (for Linux) and change it #213911105 (for Windows).

  • How to disable customers' ability to create websites with a certain domain name?

    Plesk will not create a domain if a domain with such name already exists. It is also possible to configure Plesk to disallow the creation of domains whose names are in superzones of existing domains that belong to other customers. Details are available in the KB article #115002006249 .

  • How to develop extensions for Plesk?

    Extensions can be developed using the following documentation .

  • How to execute PHP/ASP.NET/other script through the scheduled task?

    Check the instructions in the KB article #213372209 .

  • Where to find log files for Plesk and services?

    Location of log files is described in the KB articles #213403509 (for Linux) and #213911325 (for Windows).

  • Hard disk quota: What is it and how to enable it?

    The difference between the hard disk quota and the disk space limit is described in KB #213391249 (applies to both Linux and Windows). To enable the hard disk quota on Linux, follow the instructions from the KB article #213903545 . The hard disk quota is always enabled on Windows.

Managing services

  • Web Server

    • How to customize Apache/nginx virtual host configuration?

      Plesk for Linux generates virtual host configuration using scripts, which can be customized using instructions from the KB article #213413649 .

  • Mail Server

    • Why does SpamAssassin check messages sent between two local mail users?

      This is correct behavior. For more information, check the article #115002006289 .

    • How to configure a mail server to relay all mail through an external server?

      Such configuration is possible. Details are available in the KB article #213927985 .

    • How to limit autoresponder’s replies?

      See the KB article #213931145 for details.

    • Tracking and preventing outgoing spam

      (Linux only!) KB articles #213914405 , #213379869 , and #213959565 provide different approaches to tracking the source of outgoing spam on the server.

    • How to find a location of mailboxes on the server?

      The KB article #213374889 has instructions for both Linux and Windows.


  • Plesk upgrade guide

    An upgrade guide for Plesk is available in the article #213411749 .

  • What is the product lifecycle of Plesk?

    Information about the Plesk product release cycle is available in the article #213909885 .

  • How to check if a license allows upgrading to a later version of Plesk?

    The ability to upgrade to the next version is defined by Software Update Service (SUS) availability on the Plesk license. For more information, check the article #213936645 .

  • How to upgrade Plesk on a PVC Container to a new version?

    See the KB article #213952005 for more details.

Backup, transfer, and migration

  • What is Plesk Migrator?

    Plesk Migrator is a new migration tool introduced in Plesk 12.5. See article #213943725 for more information.

  • How to use Plesk Migrator?

    The KB articles #213930805 (Windows) and #213372409 (Linux) contain information on best practices for migration and transfer of data using Plesk Migrator.

  • CIs it possible to transfer from Plesk for Windows to Plesk for Linux and vice versa?

    Cross-platform migration is not supported. See the KB article #213400309 .

  • Is is possible to migrate from cPanel to Plesk?

    Migration from cPanel is supported by Plesk Migrator extension that comes with Plesk 12.5 and Onyx.

  • What changes on source server will be made during migration?

    Data on existing server stay untouched. On Linux source Plesk Migrator will just install simple Perl application to dump data (read only operations with source Plesk database). On Windows source Plesk Migrator will install and run following applications: RPC agent (service on port 10155), rsync server (on port 10156) and dump agent (application to dump data). There are no other changes will be performed.

  • What is IP mapping, will it do anything to the new server?

    IP-mapping is the mechanism to manage changes of domain IP-addresses during migration. It is described in Migration Guide . By default, all domains assigned to shared IP on source will be assigned to shared IP on target. And all domains on dedicated IP on source will be assigned to one of free dedicated IP on target. If there are not enough dedicated IPs on target, shared IP will be used (corresponding warning message will be added into report). So, IP-mapping do nothing on source and on target servers - it allow you to specify which IP-address, existing on target server, should be used for specific domains.

  • What is the best practice to switch to the new server without any downtime?

    The common scenario for highly loaded sites is to perform migration of specific domain, then switch DNS for this domain (target server DNS will be set as master on source server) - this action available only via CLI using Plesk Migrator command set-dns-forwarding, and then sync files (via rsync), databases (via SQL dump) and mail content (via rsync on unix) - Plesk Migrator provide corresponding command(s), available only via CLI: copy-content (it is include all listed actions) or copy-web-content, copy-database-content and copy-mail-content. So, files and e-mails will be actually synced (via rsync), but sync of data stored in a database is an issue because Plesk Migrator has no feature to setup replication automatically, so then you run copy-database-content command, new SQL dump will be created on the source and then restored on target. If you want to minimize downtime, I suggest you to setup replication between the source and target databases manually after migration, then sync content via Plesk Migrator CLI and run replication. After that, all data will be completely synced between the source and target servers.

Common problems and fixes

  • Plesk/Apache default page is shown on website

    There are multiple reasons for this issue. The KB article #213934145 has a handy troubleshooting guide.

  • [HUB] 502 Bad Gateway

    This error can affect both the Plesk and hosted websites. A list of possible causes and solutions is available in the KB article #115001463089 .

  • [HUB] 504 Gateway Timeout

    This error can affect both the Plesk and hosted websites. A list of possible causes and solutions is available in the KB article #115001611805 .

  • [HUB] 403 Forbidden

    This error can affect both the Plesk and hosted websites. A list of possible causes and solutions is available in the KB article #115001874705 .

  • [HUB] 99: Cannot assign requested address and AH00072: make_sock: could not bind to address

    This error can affect both apache and nginx processes. A list of possible causes and solutions is available in the KB article #115001745365 .

  • Disk quota is not applied to subscriptions on plan synchronization

    The problem may be caused by a not-enabled hard disk quota on the server. Instructions on how to check if the hard disk quota is enabled are available in the KB article #213903545 .

  • AWstats statistics on domain are incorrect or missing

    If AWstats statistics on a domain are missing, it is possible to rebuild them with information from web server log files using the script from the KB article #213901965 (Linux only!) .

  • How to fix corrupted InnoDB MySQL storage?

    If the MySQL server crashes or returns errors like Incorrect information in file: './psa/misc.frm' on queries, this means that InnoDB data storage may be corrupted. Step-by-step instructions for InnoDB repair or re-initialization can be found in the Knowledgebase article #213939865 .

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