Software Requirements for Plesk Obsidian
We recommend that you read information about the product installation, upgrade, or migration before you start deploying Plesk. This information, including detailed instructions, can be found in the Deployment Guide.
Note: When choosing the operating system for your Plesk server, we recommend that you check out the operating system termination date set by the vendor.
Linux
Plesk Obsidian for Linux can run on the following operating systems:
| Operating system | SNI support | IPv6 support |
|---|---|---|
| Debian 9 64-bit |  |
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| Debian 10 64-bit | |
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| Debian 11 64-bit | |
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| Ubuntu 18.04 64-bit | |
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| Ubuntu 20.04 64-bit | |
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| CentOS 7.x 64-bit | |
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| Red Hat Enterprise Linux 7.x 64-bit | |
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| Red Hat Enterprise Linux 8.x 64-bit | |
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| CloudLinux 7.1 and later 64-bit | |
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| CloudLinux 8.x 64-bit | |
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| AlmaLinux 8 64-bit | |
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| Rocky Linux 8.x 64-bit | |
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| Virtuozzo Linux 7 64-bit | |
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Notes:
- To install Plesk Obsidian on Red Hat Enterprise Linux, enable the "Optional" channel.
- Plesk only supports Debian and Ubuntu servers running the systemd init system. Compatibility with sysvinit has not been tested and is not guaranteed.
- Plesk supports Debian 11, however, a number of limitations exist. You can use the dist-upgrade procedure to upgrade your OS from Debian 10 to Debian 11.
- Plesk supports Ubuntu 20.04, however, a number of limitations exist.
- CentOS, Red Hat Enterprise Linux, and CloudLinux are supported at the latest available minor (.x) versions.
- You can now in-place convert your Plesk server on CentOS 8 to AlmaLinux 8. To do so, run the script prepared by the AlmaLinux team on your CentOS 8 server.
- You can now in-place convert your Plesk server on CentOS 8 to Rocky Linux 8. To do so, follow the procedure described in the Rocky Linux documentation.
Windows
Plesk Obsidian for Microsoft Windows can run on the following operating systems:
| Operating system | SNI support | IPv6 support |
|---|---|---|
| Windows Server 2012 (64-bit, Standard, Foundation, and Datacenter editions), including Server Core installations | |
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| Windows Server 2012 R2 (64-bit, Standard, Datacenter, and Essentials editions), including Server Core installations | |
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| Windows Server 2016 (64-bit, Standard, Datacenter, and Essentials editions), including Server Core installations | |
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| Windows Server 2019 (64-bit, Standard, Datacenter, and Essentials editions), including Server Core installations | |
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| Windows Server 2022 (64-bit, Standard, Datacenter, and Essentials editions), including Server Core installations | |
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Configure a static IP address on the server before installing Plesk for Windows.
Plesk for Windows can only be installed on NTFS partitions.
If you plan to use Microsoft SQL Server support in Plesk for Windows, the SQL Server must be installed and configured to use standard or mixed security mode. If Microsoft SQL Server is not installed, you can select it to be installed with Plesk for Windows and configured with administrator name "sa" and a random password.
When installing Plesk, pay attention to the following installation requirements:
CloudLinux Support
Installing or operating Plesk on a CloudLinux server with link traversal protection enabled results in a variety of issues. To avoid them, disable the 'fs.protected_symlinks_create' kernel option first.
Active Directory Domain Controllers Support
Plesk does not support this configuration. Both new Plesk installations and those updated from Plesk Onyx cannot work on a server acting as a primary or backup domain controller.
AppArmor Support
Plesk Obsidian supports AppArmor on all supported versions of Ubuntu. Before installing Plesk Obsidian on any supported Debian version, make sure that AppArmor is disabled first.
NFS Shares Support
Plesk does not officially support the use of NFS shares for storing vhosts directories. This configuration was not tested and can be used at your own risk.
Configuration and content from the following hosting platforms can be imported into Plesk Obsidian:
- Plesk for Linux and Plesk for Windows: 8.6, 9.5, 10.4, 11.0, 11.5, 12.0, 12.5, and Plesk Onyx.
- cPanel 64 and later
- Confixx 3.3
- Helm 3.2
- Plesk Expand 2.3.2
- Parallels Pro Control Panel for Linux 10.3.6
Plesk can automatically set up the following email clients:
- Microsoft Outlook (except for Microsoft Outlook 2019 and O365)
- Mozilla Thunderbird
- Gmail
- Apple Mail
Supplied Components
Linux
Plesk Obsidian for Linux distribution packages include the following components:
- Plesk Premium Antivirus 6.0.2
- Kaspersky Anti-Virus 8.5.1.102
- ImunifyAV
- AWStats 7.7
- ProFTPD 1.3.7c
- qmail 1.03
- Courier-IMAP 5.1.7
- Postfix 3.5.14 (for most OSes)
- Dovecot 2.3.18
- Horde IMP 5 (requires PHP 5.3)
- Horde 5.2.23
- IMP 6.2.27
- Ingo 3.2.16
- Kronolith 4.2.29
- Nag 4.2.19
- Mnemo 4.2.14
- Passwd 5.0.7
- Turba 4.2.25
- Pear 1.10.9
- Roundcube 1.4.13
- phpMyAdmin 5.1.3
- nginx 1.20.2
- OpenSSL 1.1.1n
- OpenSSL used by nginx 1.1.1n
- TLS 1.3 (in nginx for customers' websites)
- PHP 5.2.17, 5.3.29, 5.4.45, 5.5.38, 5.6.40, 7.0.33, 7.1.33, 7.2.34, 7.3.33, 7.4.29, 8.0.19, 8.1.6
- Fail2ban 0.11.2
- ModSecurity 3.0.6
- ModSecurity 2.9.5
- ModSecurity Rule Set 2.2.9-30-g520a94b
- Resource Controller
- Node.js 12, 14, 16, 18
Note: Node.js 18 currently not supported on the following OSes:- CentOS 7
- Ubuntu 18.04
- Debian 9
- CloudLinux 7
- Red Hat Enterprise Linux 7
- Virtuozzo Linux 7
- Phusion Passenger 6.0.12
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Ruby 2.1.10, 2.2.10, 2.3.8, 2.4.6, 2.5.5, 2.6.3.
Note: on Debian 9, only Ruby 2.4.6 and later is supported. - Bundler 1.13.5
- Rootkit Hunter 1.4.4
Windows
Plesk Obsidian for Microsoft Windows distribution packages include the following components:
- Plesk Premium Antivirus 6.0.2
- Kaspersky Anti-Virus 8.6.1.51
- ModSecurity 2.9.5
- Microsoft SQL Server Express 2012 SP3
- Microsoft SQL Server Express 2014 SP2
- Microsoft SQL Server Express 2016 SP1
- Microsoft SQL 2017 Express
- MariaDB 10.5.10 (for Plesk database)
- MariaDB 10.5.15 and 10.3.34 (for customer websites)
- BIND DNS Server 9.16.23
- MailEnable Standard 10.27
- PHP 5.6.40, 7.0.33, 7.1.33, 7.2.34, 7.3.33, 7.4.29, 8.0.19, 8.1.6
- ASP.NET Core 2.1.28, 3.1.23, 5.0.15, 6.0.3
- .NET Core 3.1.3, 2.1.17
- ionCube Loader 10.4.1
- SpamAssassin 3.0-3.4.5
- myLittleAdmin 3.8.20
- phpMyAdmin 5.0.3
- AWStats 7.7
- Webalizer V2.01-10-RB02 (Windows NT 5.2) English
- Horde 5.2.23 and IMP 6.2.27
- Microsoft Web Deploy 3.5 + WebMatrix 3.0
- Microsoft Web Deploy 3.6
- IIS URL Rewrite Module 7.2.1993
- Node.js 8, 10, 12
- 7zip 18.05
- Microsoft Visual C++ 2017 Redistributable
Supported Third-Party Components
Linux
Web servers:
- Apache 2.4
Mail servers:
- Postfix 2.11.3 (Debian 8)
DNS servers:
- BIND 9.8–9.11
Web statistics:
- Webalizer 2.x
Web scripting:
- mod_perl 2.0.8
- mod_python 3.3.1 *
- PHP 5.2–8.1 **
Database servers and tools:
- MySQL 5.7 and later
- MySQL community edition 5.7, 8
- PostgreSQL 8.4–12
- MariaDB 5.5-10.6
- MariaDB Connector 3.0.9
Anti-spam tools:
- SpamAssassin 3.0–3.4
* - mod_python is not supported on Red Hat Enterprise Linux 7.x, CentOS 7.x, and CloudLinux 7.x.
** - by default, PHP used for Plesk webmail (Horde, Roundcube) is installed from the repository of the OS vendor. You can install PHP from an alternative repository following the repository maintainers' instructions, provided that the PHP package names remain the same. Installing PHP from a repository that changes the names of PHP packages (for example, IUS, Webtatic) will prevent Plesk webmail from operating correctly, and may also cause dependency issues when installing Plesk updates.
Windows
This is a shortened list of supported third-party components. It does not include the components supplied with the Plesk distribution, as they were already mentioned as distributed and supported.
Web servers
- Microsoft Internet Information Services (IIS) 7.5, 8.0, 8.5, 10.0
Mail servers
- MailEnable Standard / Professional / Enterprise / Enterprise Premium 6.91–10.34
- SmarterMail 100, 16.3
- IceWarp Mail Server 12.0.3.1
Webmail tools
- MailEnable Web Client
- SmarterMail Web Client
- IceWarp (Merak) Mail Server Web Client
Spam filtering tools
- SmarterMail Spamfilter
- IceWarp (Merak) Mail Server Anti-Spam
Antivirus tools
- SmarterMail Anti-Virus
- IceWarp (Merak) Mail Server Anti-Virus
DNS servers
- Microsoft DNS Server
- Simple DNS Plus 6.0.115
Web statistics
- SmarterStats 11.1
Web scripting
- ASP
- ASP.NET 2.0-4.x
- ASP.NET Core 2.1.28, 3.1.23, 5.0.15, 6.0.3 (“Windows Server Hosting (.exe) Runtime” on the download page)
- Python 2.7.17
Database servers
- Microsoft SQL Server 2005–2016
- MySQL community edition 5.7
- MySQL ODBC connector 5.3.14