Technical Questions
Help articles related to Plesk migration, upgrades, databases ant etc.
Other
- How to diagnose a DoS/DDoS attack and find websites under attack on a Plesk server
- CVE-2022-21907: HTTP Protocol Stack Remote Code Execution Vulnerability on Windows
- CVE-2021-44224: Apache HTTP Server vulnerability
- CVE-2021-46144: Vulnerability in Roundcube
- Is Plesk affected by CVE-2021-44228 vulnerability in log4j package of Apache?
- CVE-2021-44025 and CVE-2021-44026: RoundCube vulnerabilities
Plesk Service/Interface
- MySQL fails to start when a Plesk server lacks disk space: SQLSTATE[HY000] No space left on device 500 Plesk\Exception\Database
- Unable to access Plesk Onyx 17.5.3 or Plesk Onyx 17.8.11: The file /opt/psa/admin/htdocs/application.php is part of Plesk distribution. It cannot be run outside of Plesk environment.
- Service Plan can not be opened for editing in Plesk: Argument 1 passed to isFpmDedicatedHandler() must be of the type array, null given
- [BUG] - Unable to access the Scheduled tasks from Dev Tools as Reseller in Plesk: Permission denied
- Unable to log in to Plesk after update to version 18.0.40: Lock Manager error: 'getrandom'.
- Plesk Update Manager fails on the RHEL-based OS of version 8.5: 'NoneType' object has no attribute 'run_sack'
Webserver
- How to disable specific ModSecurity rules in Plesk
- Apache keeps going down on a Plesk server: server reached MaxRequestWorkers setting
- Websites on PHP-FPM are unavailable or loading slowly: "server reached max_children setting" OR "pool seems busy"
- All sites are down in Plesk: Syntax error on line 31 of /etc/httpd/conf.d/php.conf: Invalid command 'php_value'
- CVE-2021-21703: Vulnerability in PHP-FPM
- Website on Plesk server suddenly started to show 500 error: AH10292: Invalid proxy UDS filename
Applications & Extensions
- WordPress cloning failed on Plesk server: Failed to reset cache for the instance
- WordPress instance inside a sub-directory on Plesk server shows "404 Page not found" errors for existing categories or posts
- Autodetection of WordPress login URL does not work properly in Plesk Wordpress Toolkit
- Web reconfiguration in Plesk fails: unknown option 'InheritBefore'
- Unable to publish a website, restore/download a snapshot or upload an image in Web Presence Builder for Plesk Obsidian 18.0.40 on Windows
- Why the OUTPUT DROP rule is added at the beginning of the rules via Plesk Firewall extension?
Backup, Restore & Migration
- How to change the location for Plesk backup files on a Linux server
- How to extract the files from a Plesk backup created in Plesk Obsidian 18.0.40 and later versions
- How to switch to the new tokens scheme after Dropbox Backup update?
- Migration fails with mixed case domains on the source server: exit code: 23
- Does Plesk support Amazon S3 compatible Backblaze B2 storage?
- Pre-migration warning when migrating from server with custom Apache modules: The following Apache modules are not installed
Databases
- How to upgrade MySQL 5.5 to 5.6/5.7 or MariaDB 5.5 to 10.x on Linux?
- How to fix InnoDB corruption cases for the MySQL databases on Plesk for Linux?
- In Plesk, dumps of MySQL databases with DEFINERs/TRIGGERs are exported with incorrect syntax of queries that should create DEFINERs/TRIGGERs
- Unable to restore the Plesk psa database: ERROR 1813 (HY000) at line 104: Tablespace for table '`psa`.`tablename`' exists. Please DISCARD the tablespace before IMPORT
- Unable to add MS SQL Server in Plesk: Login failed for user 'administrator'
- Unable to delete MS SQL database in Plesk: User does not have permission to alter database, the database does not exist, or the database is not in a state that allows access checks
Installation & Upgrade
- How to change or get the server hostname on the Plesk server
- How to uninstall Plesk
- List of OS supported by Plesk
- Unable to access Plesk Installer page from an Apple device: Your connection is not private
- Does Plesk support Debian 11?
- Error during Plesk upgrade to Obsidian 18.0.37: PHP Fatal error: Uncaught JMS\Serializer\Exception\RuntimeException: Could not decode JSON, syntax error - malformed JSON.
- IMAP folders are not displayed in Outlook
- Excessive SRS header is displayed in From field in mail clients for some forwarded emails
- Mail user can't change its own forwarding in Plesk
- Emails can not be received/sent on a Plesk server due to stopped MailEnable SMTP Connector service
- How /etc/msmtprc file can be overwritten by Plesk?
- [BUG] After updating to Plesk Obsidian 18.0.37 or 18.0.37 Update 1, email message sent to Plesk email account without mailbox and with forwarding to external mailbox is stuck in mail queue
DNS & Statistics
- Unable to start BIND on Plesk server: Failed with result 'timeout'
- Domains hosted on Plesk server cannot be accessed: DNSPROBE FINISHED ERROR
- Unable to update web-statistics in Plesk: Unable to parse pending domains traffic line
- Unable to start DNS service on the Plesk server: missing semi-colon before dnssec-lookaside
- Mail is received: No valid IP addresses found for sub.example.com
- Does Plesk support DANE and TLSA?
Website Builder
- How to install Web Presence Builder 17.8.12 Standalone in Plesk for CentOS 8/Debian 10?
- Migration from WPB 12.0 to WPB 17.8.12
- How to enable Web Presence Builder for all websites?
- Web Presence Builder "Text & Images" module is displayed on all website pages instead of being displayed only on the page where the module had been added
- Error while accessing Web Presence Builder: Base table or view not found
- Unable to backup/restore a snapshot for Web Presence Builder in Plesk for Windows: Invalid Snapshot