Technical Questions
Help articles related to Plesk migration, upgrades, databases ant etc.
Other
- How to start a command prompt as an Administrator on Windows Server
- How to diagnose a DoS/DDoS attack and find websites under attack on a Plesk server
- How to monitor usage of system resources in a period of time using atop?
- CVE-2021-3156: vulnerability in Sudo before 1.9.5p2
- Unable to connect to the Plesk server via SFTP: Received unexpected end-of-file from SFTP server
- Will Plesk support CentOS Stream?
Plesk Service/Interface
- Plesk interface is not accessible on ports 8443/8880: ERR_CONNECTION_TIMED_OUT
- Plesk reconfigurator unable to change the location for virtual hosts
- How to change the view in the Websites & Domains menu in Plesk
- Unable to manage PHP Performance and security settings and PHP-FPM settings as customer or reseller in Plesk Obsidian 18.0.32
- Bandwidth limiting options are unavailable for domains in Plesk Obsidian 18.0.32
- Unable to log in to Plesk Obsidian: Error: Access for administrator from address '127.0.0.1' is restricted in accordance with IP Access restriction policy currently applied.
Webserver
- How to disable specific ModSecurity rules in Plesk
- Websites on PHP-FPM are unavailable or loading slowly: "server reached max_children setting" OR "pool seems busy"
- Unable to reconfigure domain on Plesk server: Wrong variable to subsitute: webAppFirewallSettings
- Unable to start Apache on Ubuntu 16: Failed to mangle name: Invalid argument
- When PHP 8 will be implemented in Plesk ?
- Unable to access Plesk and IIS service: Error: Configuration file is not well-formed XML
Applications & Extensions
- WordPress plugins/themes can not be updated via Plesk WordPress Toolkit: Passed 'exception' value must be an \Exception object
- Plesk Premium Email shows the warning on Plesk server: Necessary packages are not installed
- After updating WordPress Toolkit to version 5.3, WordPress instances on domains with PHP 5.3 or lower could not be managed via WordPress Toolkit
- Let's Encrypt extension in Plesk shows that certificate will no longer be used for example.com even if it is correctly installed
- WordPress functionality is broken in Plesk after changing domain PHP version to 8.0: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array,
- Unable to activate or update the Comodo rule-set in Plesk ModSecurity: Error interacting with https://waf.comodo.com/doc/meta_comodo_apache.yaml: <urlopen error [Errno 113] No route to host>
Backup, Restore & Migration
- Unable to backup some databases via Plesk Backup Manager: database belongs to the other subscription
- Migration in Plesk failed: Configuration error: Invalid remote IP address '0.0.0.0'
- Pre-migration check shows warning in Plesk: Migration of error documents is not supported on Windows since Plesk 18.0.31
- Plesk Migrator shows the warning: There is no shared IPv6 address on target Plesk
- Plesk backup finishes with warning: Not all the data from /var/www/vhosts/example.com was backed up successfully
- Cannot create remote backup in Plesk. Error: Unable to export backup: Transport error: Extension transport: ext://one-drive-backup/server/: Required parameter not passed: "refresh_token"
Databases
- How to upgrade MySQL 5.5 to 5.6/5.7 or MariaDB 5.5 to 10.x on Linux?
- How to restore Plesk system databases from a Plesk daily/pre-upgrade dump
- Websites configured with PHP 7.2 or lower version fail to establish a database connection after updating MariaDB to v10.2.35 or v10.3.26: Malformed communication packet
- Unable to export database via phpMyAdmin in Plesk: Argument 5 passed to PhpMyAdmin\Export::getFilenameAndMimetype() must be of the type string, null given
- Diagnose & Repair tool detected issues with the database. How to fix them?
- Backup failed with the error in Plesk: 1049 Unknown database 'example'
Installation & Upgrade
- After November 30th, 2020, updating system packages on Plesk server with CentOS 6 fails: Cannot find a valid baseurl for repo: base
- How to change or get the server hostname on the Plesk server
- After upgrading Plesk Obsidian to 18.0.30, scheduled Plesk backups show the message: The following files were not found or were corrupted: backup_privatekey_2009210501.tgz
- Cannot update to Plesk Obsidian 18.0.29 on Plesk for Windows: Error occured while performing sub-action 'UpgradeZip'
- Ubuntu 20.04 support in Plesk
- Cannot install Plesk update on CentOS 7: Failed to solve dependencies: plesk-core requires ca-certificates >= 2020.2.41
- Custom mailbox's size is getting reset when mailbox's settings page is opened in Plesk
- Mail stuck in queue on Plesk server: delivery temporarily suspended: connect to 127.0.0.1[127.0.0.1]:10024: Connection refused
- [BUG] Incoming messages are duplicated on a few or all mailboxes on a Plesk server with Courier
- Emails are not sent/received when Plesk Email Security is installed: Access denied for user '<database_name>'@'127.0.0.1' (using password: YES)
- Mail stuck in the queue in the server with Plesk: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (13)
- The default certificate is used for IMAP connection when the Plesk Premium Mail is installed
DNS & Statistics
- Plesk domain is not resolved from some countries: DNS_PROBE_FINISHED_NXDOMAIN
- 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
- How to add an MX DNS record with a custom priority for a Plesk domain?
- Mail is received: No valid IP addresses found for sub.example.com
- CVE-2020-8616, CVE-2020-8617: BIND vulnerabilities
Website Builder
- Migration from WPB 12.0 to WPB 17.8.12
- How to enable Web Presence Builder for all websites?
- Presence Builder does not redirect to correct URL when the session in browser is expired: Unable to connect to Web Presence Builder server
- 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