Release Notes for Parallels Plesk Panel 9.5.4 for PKG-based Linux/Unix Systems


  1. Introduction
  2. What's New
    1. Parallels Plesk Panel 9.5.4
    2. Parallels Plesk Panel 9.5.3
    3. Parallels Plesk Panel 9.5.2
    4. Parallels Plesk Panel 9.5.1
    5. Parallels Plesk Panel 9.5.0
    6. Parallels Plesk Panel 9.3.0
    7. Parallels Plesk Panel 9.2.3 Update 1
    8. Parallels Plesk Panel 9.2.3
    9. Parallels Plesk Panel 9.2.2
    10. Parallels Plesk Panel 9.2.1
  3. Software Requirements
  4. Supplied Components
  5. Supported Third-Party Components
  6. Installation Instructions
  7. Upgrade Instructions
  8. Known Problems and Limitations
  9. Contact Information

1. Introduction

This file contains information that supplements the Parallels Plesk Panel documentation, such as requirements, information about new features, resolved bugs, and known problems. This file was updated with the latest information available at the time of release.

2. What's New


[+] new feature

[-] bug resolved

[*] bug resolved and functionality improved

Parallels Plesk Panel 9.5.4

  1. [-] Issue resolved: An IP address could not be added to the mail server white list if it was in DNS zone file.

  2. [-] Issue resolved for Postfix: Messages sent to several mailing lists with Postfix were actually delivered to only one mailing list.

  3. [-] Issue resolved for Postfix: mail server bounced mail messages sent to a domain with mail service turned off and mail to non-existent users bounce set up, instead of redirecting the mail to an external mail server defined with MX record in the DNS zone.

  4. [-] Issue resolved for Postfix: sqlite3 error appeared in log files upon an authentication with the CRAM-MD5 method, while the authentication was actually successful.

  5. [-] Issue resolved: The spam training process "spammng" occupied all memory on the Plesk server, and as a result the Spam Filter Training tab was shown incorrectly.

  6. [-] Issue resolved: Reduced upgrade time on servers with a lot of mailboxes.

  7. [-] Issue resolved for Qmail: If there were a redirect and a mail group configured on a mailname to point at the same e-mail address, upon the redirect removal, the address was removed from the mail group as well. For details, see

  8. [-] Issue resolved for Postfix: Plesk changed the order of "smtpd_client_restrictions" rules that were added manually to the Postfix configuration file if black list was enabled via Plesk GUI. For additional details, see

  9. [-] Issue resolved for Postfix: Now Plesk strictly configures Postfix for using IPv4.

  10. [-] Issue resolved: SPF spam protection worked incorrectly: all messages were resolved only as "neutral" or "pass", and local rules were ignored — a default whitelist was always used.

  11. [-] Issue resolved for Qmail: Neither successful nor failed CRAM-MD5 authentications were added to mail server log files.

  12. [-] Issue resolved: A domain alias was still scanned for spam even though spam filtering was turned off for the mail account. For more details, see

  13. [-] Issue resolved for Qmail: Mail handlers were used for local deliveries, which could lead to failing a message delivery when it was sent to an alias on the same host.

  14. [-] Issue resolved: When greylisting was enabled, it rejected the mail messages that users authorized via SMTP tried to send to local and remote recipients.

Parallels Plesk Panel 9.5.3

  1. [-] Security vulnerability in ProFTPD which allowed unauthenticated attackers to execute remote code and compromise a server was fixed.

  2. [+] Compatibility with Parallels Virtuozzo Containers 4.6.

  3. [*] Google Services for Websites localization - now Google Services for Websites can be used in the same language as your current Parallels Plesk Panel locale.

  4. [*] Stability of Postfix queue was increased to avoid the queue file write error.

  5. [-] Virtuozzo promotion in the top frame of Parallels Plesk Panel is removed.

  6. [-] Domains that exceeded limits are not suspended on a server with a lot of domains bug is fixed.

  7. [-] SSL is available for subdomains, but a configuration file for SSL connection is not supported by subdomains bug is fixed.

  8. [-] The size of mail log file is growing and logs are not properly rotated bug is fixed.

  9. [-] Subdomain switching to PHP in FastCGI is applied to consequent subdomains bug is fixed.

  10. [-] Executing statistics tool causes segmentation fault in Postfix when the size of mail log is large bug is fixed.

  11. [-] The Parallels Plesk Panel server does not update traffic of the clients bug is fixed.

  12. [-] The statistics utility generates directories in the wrong format for all domains when invoked after backup restoration or migration bug is fixed.

  13. [-] It takes almost four minutes to open a domain's hosting preferences page bug is fixed.

  14. [-] Problem in libspf which causes incorrect work of SPF rules bug is fixed.

  15. [-] Domain user cannot log in to the server with SFTP, the error 'connection closed' is returned bug is fixed.

  16. [-] Some countries are not listed at the Add SSL Certificate page, so customers cannot generate a CSR bug is fixed.

Parallels Plesk Panel 9.5.2

  1. [-] Migrating Java applications fails bug is fixed.

  2. [-] In some cases after upgrade, the old version of Horde remains registered in Plesk when actually Horde was successfully upgraded bug is fixed.

  3. [-] Impossible to change mail account password from Horde webmail interface bug is fixed.

  4. [-] After upgrade, Horde stops accepting short usernames (without the "@doman" part) bug is fixed.

  5. [-] After upgrade, Horde Kronolith calendar works with errors and fails to create events bug is fixed.

  6. [-] After upgrade, mobile browsers return the Not Found error when trying to access Horde webmail bug is fixed.

  7. [-] Browser returns error when trying to access an Address Book on Horde webmail after upgrade bug is fixed.

  8. [-] Migration Manager reports that dump validation failed due to invalid value of the "enabled" attribute of mail redirects for some mail accounts where mail redirection is set up but disabled bug is fixed.

  9. [-] When upgrading from Plesk versions earlier than 8.6, serial number of DNS zone was set to "0" bug is fixed.

  10. [-] After migration from Plesk versions earlier than 8.6, site applications are not shown in the Panel if the APS package release on target host differs from that on the source while the app version is the same bug is fixed.

  11. [-] After upgrade, installation of site applications fails on domains where files/folders permissions were set to wrong values bug is fixed.

Parallels Plesk Panel 9.5.1

  1. [+] Support for new hypervizor virtualization solutions: the Panel operates in environments created with KVM and Parallels Server 4 Bare Metal.

  2. [-] Backup task starts even if there is not enough disk space on the server bug is fixed. For details, see the Backup and Restore Utilities Administrator's Guide available at

  3. [-] Backup scheduled to run weekly did not work bug is fixed.

  4. [-] Scheduled backups are not created in FTP repository if the repository server works in FTP passive mode bug is fixed.

  5. [-] Removing backup located in FTP repository failed with "FTP network error" bug is fixed.

  6. [-] When setting up FTP backup repository, defining username like "" is impossible bug is fixed.

  7. [-] The Panel resets permissions on folders inside the httpdocs and httpsdocs directories to "755" during migration bug is fixed.

  8. [-] Migration hanging at 50% bug is fixed.

  9. [-] User password was changed event handler is added.

Parallels Plesk Panel 9.5.0

  1. [+] Free migration, installation and upgrade assistance — to help our customers start using Parallels Plesk Panel 9.5, Parallels provides free support for migration, installation and upgrade of the Panel.

    NOTE: Providing free assistance changes licensing options for the Parallels Plesk Panel, so it is required that you obtain a new license for the version 9.5 in the Parallels Online Store located at

  2. [+] PCI Compliance — Parallels Plesk Panel can be made compliant with the Payment Card Industry Data Security Standard. This can be achieved by running a special PCI compliance resolver utility and additional tuning of system components, as described in the document Achieving PCI Compliance for Servers Managed by Parallels Plesk Panel 9.5. The document is available at

  3. [+] Compatibility with Microsoft Internet Explorer 8 — Parallels Plesk Panel is now compatible with Microsoft Internet Explorer 8.

  4. [+] Google Services for Websites support (beta) — Parallels Plesk Panel 9.5 can now be integrated with Google Services for Websites. To learn more, refer to Parallels Plesk Panel 9.5 Administrator's Guide at

    IMPORTANT: Currently, this functionality is provided in the Beta state for testing purposes only. Do not try using in a production environment.

  5. [+] More virtualization solutions supported: Parallels Plesk Panel 9.5 can operate in virtual environments created by the following virtualization solutions: Microsoft Hyper-V, Xen, and VMWare. There are special licensing options for Parallels Panel software operating inside virtual environments. For more information about licensing options, contact your vendor or call Parallels sales team. The phone numbers are listed at

  6. [+] Upgraded components: ProFTPD was upgraded to the version 1.3.2e, phpMyAdmin to the version 2.9.11, and Horde Application Framework to the version 3.3.6.

  7. [+] Dr. Web antivirus component goes under the name Parallels Premium Anitivirus.

  8. [-] An unauthenticated remote attacker being able to compromise the system and gain control over it security issues were resolved.

  9. [-] Cross-site scripting vulnerability was eliminated.

  10. [-] ProFTPD 1.3.1 was prone to a security vulnerability that allowed attackers to perform cross-site request forgery types of attacks issue is resolved by upgrade of ProFTPD to the version 1.3.2e.

  11. [-] If a temporary directory on the server was full, FTP network error occurred on attempt to move a file from an FTP storage to the server repository issue is resolved.

  12. [-] Migration of websites from Plesk Control Panel 7.5.4 to Parallels Plesk Panel 9.2.1 failed if the SpamAssassin spam filter was configured to remove spam e-mail issue is resolved.

  13. [-] Scheduled security scanning by Watchdog (System Monitoring) Module could not start issue is resolved.

  14. [-] Postfix mail server occasionally failed to deliver some e-mail messages with the "Unprocessed command" errors issue is resolved.

  15. [-] SpamAssassin spam filter incorrectly classified most of the messages delivered in the year 2010 as spam issue is resolved.

  16. [-] After upgrading Parallels Plesk Panel from versions 8.x to 9.x, scheduled backups could stop working issue is resolved.

  17. [-] After upgrade, var/qmail/control/me file contained only the hostname issue is resolved.

  18. [-] Plesk 8.x key was not updated automatically to 9.x during product upgradeissue is resolved.

  19. [-] Horde webmail did not open properly in Internet Explorer 8issue is resolved.

  20. [-] Web statistics were not calculated properly when the piped logs feature was switched onissue is resolved.

  21. [-] The Watchdog (System Monitoring) Module showed security warnings (false positives) due to incorrect default configurationissue is resolved.

Parallels Plesk Panel 9.3.0

  1. [+] Apache port change — you can change Apache Web server port to use a lightweight high-performance Web server, such as nginx, as a front-end Web server, and move Apache Web server to back-end.

  2. [-] Certificates from repository of domain set on exclusive IP address are reset when domain backup is restored bug is fixed.

  3. [-] The "Applications" link appearing in the left frame for domain administrator's main menu when applications management is not supported by license bug is fixed.

  4. [-] Enabled mail greylisting loads server's CPU/memory hardly bug is fixed.

  5. [-] Applying pattern not listed in greylisting configuration bug is fixed.

  6. [-] Timeout in postfix-queue prohibiting to send messages with big attachments from Parallels Plesk Panel server bug is fixed.

  7. [-] Syntax error in the backup-unpack utility bug is fixed.

  8. [-] If a message cannot be sent, sender receives a message with invalid field from=#@[] bug is fixed.

Parallels Plesk Panel 9.2.3 Update 1

  1. [-] Several security issues were resolved.

Parallels Plesk Panel 9.2.3

  1. [+] Improved Updates — Improved updates functionality provides you with quicker and timely hotfixes and component updates.

  2. [-] DomainKeys adding an improper comment header to e-mail messages bug is fixed.

  3. [-] Web applications crashing because php.ini was not preconfigured for FastCGI bug is fixed.

  4. [-] Mailing lists not working after upgrade from 8.x to 9.x due to wrong Mailman location paths bug is fixed.

  5. [-] High CPU load caused by authpsa processes bug is fixed.

  6. [-] Passwords of similar e-mail aliases being updated unintentionally bug is fixed.

  7. [-] Tomcat Java applications not working after upgrade bug is fixed.

  8. [-] Domains that exceeded resource limits are not suspended on servers with a lot of domains bug is fixed.

  9. [-] Mail queue utility mailqueuemng only lists messages from deferred queue when Postfix mail server is used bug is fixed.

  10. [-] Files processed by mail handlers are created with random permissions bug is fixed.

  11. [-] Mail forwarding not working and reporting broken pipe error when Postfix mail server is used bug is fixed.

  12. [-] Local mail delivery not working when Qmail mail server is used bug is fixed.

  13. [-] Inability to switch default interface language to another language if Parallels Plesk Panel license key allows no additional languages bug is fixed.

  14. [-] Mail malfunctioning due to buffer length limitation in spam handlers bug is fixed.

  15. [-] Postfix mail server crashing with segfault error on processing messages with strings larger than 4096 characters bug is fixed.

  16. [-] High CPU load caused by relaylock processes bug is fixed.

  17. [-] No support for UI pointers in root.controls.lock file bug is fixed.

  18. [-] Old credentials still working and error displayed in the Panel if mail account name and password are changed at the same time bug is fixed.

  19. [-] Automatic removal of mailing lists with names similar to the one actually being removed (or disabled) on qmail bug is fixed.

  20. [-] Messages sent to a non-existent user locally (with transport other than SMTP) were stuck in mail queue instead of being rejected under Postfix bug is fixed.

Parallels Plesk Panel 9.2.2

  1. [+] Dr.Web 5 — Parallels Plesk Panel 9.2.2 is shipped with the newest version of Dr.Web antivirus software.

Parallels Plesk Panel 9.2.1

  1. [+] Greylisting — Greylisting spam filtering is now available in Parallels Plesk Panel.

  2. [+] Migration Manager — New Migration Manager feature allows you to transfer your data from other Parallels Plesk Panel installations.

  3. [+] Migration from cPanel — Migration Manager now supports migration from cPanel to Parallels Plesk Panel.

  4. [-] Courier-IMAP shipped with Parallels Plesk Panel not supporting mailbox quota larger than 2 GB bug is fixed.

  5. [-] DNS record <lists.> being duplicated if it exists in DNS zone template and a domain is created with Mailman mailing list enabled bug is fixed.

  6. [-] Autoresponder replying with incorrect FROM address when incoming message was sent to multiple addresses bug is fixed.

  7. [-] Mail aliases not synchronized correctly with corresponding mail account bug is fixed.

  8. [-] Incorrect hint for server-wide black list bug is fixed.

  9. [-] Messages sent to a mail group are not delivered to the sender when Postfix mail server is used bug is fixed.

  10. [-] New IP addresses not being added to Webmail configuration files, leading to inability to access Webmail bug is fixed.

  11. [-] Mailbox quota set incorrectly via API-RPC bug is fixed.

  12. [-] File manager unable to enter the folder with name '0' bug is fixed.

  13. [-] Postfix not being able to send e-mail messages with attachments bug is fixed.

  14. [-] Outgoing mail from domain aliases not being signed by DomainKeys bug is fixed.

  15. [-] "proc_close() failed: mktime()" error displayed upon activation of new Firewall rules bug is fixed.

  16. [-] Qmail unable to write or delete smtp_poplocks, displaying errors like "Unable to delete expired smtp_poplocks: database is locked" bug is fixed.

  17. [-] Backup failing with "Could not parse status disabled by value '32'" error bug is fixed.

  18. [-] Inability to authenticate via IMAP/POP3 after the upgrade bug is fixed.

  19. [-] Backup file content not being properly restored due to incorrectly applied restore conflicts resolution policy bug is fixed.

  20. [-] Client-related information not shown in custom button's query string even when it is required bug is fixed.

  21. [-] Domain aliases not inheriting domain's mail policy settings when Postfix mail server is used bug is fixed.

  22. [-] Red color of traffic indicator on a domain bug is fixed.

  23. [-] Acronis True Image Server Module not working bug is fixed.

  24. [-] Inability to update scheduled task due to 'Object not found: Scheduled Task' error bug is fixed.

  25. [-] SpamAssassin not checking mail sent to mail account aliases bug is fixed.

  26. [-] Parallels Plesk Panel not checking availability of mailing lists created directly through Mailman bug is fixed.

  27. [-] No warning about remote FTP repository not being set up when trying to schedule a backup task to remote FTP repository that has not been set up yet bug is fixed.

  28. [-] Mail group members receiving messages with empty subject from "POP3 service user" when sending message to mail group bug is fixed.

  29. [-] Inability to restore data from backup file larger than 2GB bug is fixed.

  30. [-] Database users not being restored properly during the restoration of a domain that already exists in the system. bug is fixed.

  31. [-] DNS records not migrating properly due to 'mail.<domain>.' CNAME record bug is fixed.

  32. [-] Missing link to the description of event handler variables in documentation bug is fixed.

  33. [-] Default language information not being backed up for domain administrator accounts bug is fixed.

  34. [-] Autoresponder trying to send autoreplies to spam messages bug is fixed.

  35. [-] Mail aliases using reserved system aliases such as 'info' not delivering mail bug is fixed.

  36. [-] Running PHP as FastCGI application causes 403 Forbidden error when trying to access a website bug is fixed.

  37. [-] Autoresponder on a mail alias missing after the upgrade to Parallels Plesk Panel 9.0.x bug is fixed.

  38. [-] Backup Manager incorrectly reporting warnings as errors when used via CLI bug is fixed.

  39. [-] "SMTP AUTH" option not working in Qmail, leading to inability to authenticate with Outlook mail client bug is fixed.

  40. [-] Postfix incorrectly reporting an error when mail handler returns STOP bug is fixed.

  41. [-] Statistics utility not reconnecting to MySQL and causing statistics calculation to fail bug is fixed.

  42. [-] migration.log file is stored in $HTTPD_VHOSTS_D bug is fixed.

  43. [-] Inability to remove exclusive IP addresses from client and reseller template IP pools, where these IPs are still displayed as shared bug is fixed.

  44. [-] Wordpress not requesting the requirement to have safe_mode off bug is fixed.

  45. [-] Option 'check for simple mail passwords' not working on 64-bit systems bug is fixed.

  46. [-] Inability to make an application from the Application Vault available to all users bug is fixed.

  47. [-] Webmail not working on a domain if domain's IP address was added after webmail was set up on the server bug is fixed.

  48. [-] Inability to install Application Vault applications if open_basedir parameter is switched on bug is fixed.

  49. [-] Converted backup file is not recognized as a valid backup file bug is fixed.

  50. [-] Backup creation time is displayed in GMT instead of actual time bug is fixed.

  51. [-] Overuse policy cannot be changed if limits are already exceeded bug is fixed.

  52. [-] Size of backup file located on remote FTP server being reported incorrectly bug is fixed.

  53. [-] 'Unable to get options for SPF filter' error reported when mail is sent from localhost bug is fixed.

  54. [-] Cannot remove non-existent IP addresses using Parallels Plesk Panel GUI bug is fixed.

  55. [-] Updating Parallels Plesk Panel license key via GUI hangs Parallels Plesk Panel under some circumstances bug is fixed.

  56. [-] IP addresses removed from Parallels Plesk Panel GUI are not removed from Apache configuration bug is fixed.

  57. [-] Backed up content of web users' websites is corrupted when backup file is converted to Parallels Plesk Panel 9 compatible format bug is fixed.

  58. [*] DNS Settings for a domain on domain Home page — DNS Settings button for a domain is now located on domain's Home page.

  59. [*] Configuring Parallels Plesk Panel to work behind NAT — Instructions for configuring Parallels Plesk Panel to work behind routers and NAT was added to Administrator's Guide.

  60. [*] Bugfixes and improvements — A number of issues reported by customers were fixed, multiple other bugfixes and improvements were made.

3. Software Requirements

Parallels Plesk Panel 9.5.4 for Linux/Unix requires one of the following operating systems installed on the server:

4. Supplied Components

Parallels Plesk Panel 9.5.4 for Linux/Unix distribution packages ship with the following components:

5. Supported Third-Party Components

Mail servers:


DNS servers:

FTP servers:

Web statistics:

Web scripting:

Web administration tools:

Database servers:

Webmail solutions:

Spam filtering tools:

6. Installation Instructions

We strongly recommend that you refer to the product installation instructions prior to upgrading/installing and operating Parallels Plesk Panel. The installation guide for Parallels Plesk Panel can be accessed at, along with the rest of the user documentation. Parallels Plesk Panel Knowledge Base can be accessed at

Before starting installation, back up any valuable data on the server.

6.1. Installing Parallels Plesk Panel by Means of Parallels Products Installer

IMPORTANT: To install Postfix mail server, you need to select the Postfix component for installation in Parallels Products Installer. Both command line interface and Web interface of Parallels Products Installer can be used for selecting and installing Postfix mail server.

NOTE: If you are going to host more than 300 web sites on the Parallels Plesk Panel server, recompile Apache as described in the KB article at or in Parallels Plesk Panel 9.5 for Linux/Unix Advanced Administration Guide.

To install Parallels Plesk Panel software on a server:

  1. Download the latest version of Parallels Products Installer that suits your operating system from and save it on your server's hard drive.
  2. Change your working directory to the directory where the downloaded Parallels Products Installer is located.
  3. Set the execution permission for Parallels Products Installer:
    # chmod +x parallels_products_installer_file_name
  4. Issue the following command in console:
    #setenv LANG C
    #setenv LC_ALL C
  5. Run Parallels Products Installer:

  6. Follow the instructions presented on the screen to complete the installation. Refer to Parallels Plesk Panel Installation Guide available at if you need detailed installation instructions.
  7. When the installation is finished, Parallels Plesk Panel will start automatically.

6.2. Installing Parallels Plesk Panel Manually from PKG Packages

  1. Log in as root and add the entry kern_securelevel_enable="NO" to file /etc/rc.conf, otherwise, installation may fail.
  2. Download the tar.gz archive with ports, distfiles and packages from
  3. Place Parallels Plesk Panel packages into /usr/ports/packages/All.
  4. Unpack the archive and place Parallels Plesk Panel distfiles into /usr/ports/distfiles.
  5. Issue the following command in console:
    #export LANG=C
    #export LANG_ALL=C
  6. Create /usr/ports/swsoft folder and copy all subfolders from 'ports_release' directory to /usr/ports/swsoft.
  7. If you are upgrading Parallels Plesk Panel, stop its services by issuing the command: /usr/local/etc/rc.d/ stop. If you have Plesk 8.0.1 or earlier version installed, you should use the command /usr/local/psa/rc.d/ stop.
  8. Execute the following commands:
    cd /usr/ports/swsoft/ports-core; make install
    cd /usr/ports/swsoft/ports-common; make install
    cd /usr/ports/swsoft
  9. To select Parallels Plesk Panel components you want to install, issue the command make config
  10. To install/upgrade Parallels Plesk Panel, issue the command make install

To finish the initial configuration of Parallels Plesk Panel, log in to Parallels Plesk Panel on your server at or https://IP-address:8443/.

The default username is "admin" and the default password is "setup". Both are case-sensitive. For security reasons the password must be changed upon initial login.

You also need to obtain and install a license key suitable for Parallels Plesk Panel 9.5.

7. Upgrade Instructions

IMPORTANT: Make sure you upgrade all installed components when upgrading to a newer version of Parallels Plesk Panel. This is required to avoid conflicts caused by outdated components.

Upgrading Parallels Plesk Panel from GUI

To upgrade your Parallels Plesk Panel software from its user interface, refer to Parallels Plesk Panel Installation Guide available at

Upgrading Parallels Plesk Panel by Means of Parallels Products Installer

To upgrade your Parallels Plesk Panel software by means of Parallels Products Installer:

  1. Download the latest version of Parallels Products Installer that suits your operating system from and save it on your server's hard drive.
  2. Change your working directory to the directory where the downloaded Parallels Products Installer is located.
  3. Set the execution permission for Parallels Products Installer:
    # chmod +x parallels_products_installer_file_name
  4. Run the following command in console:
    #export LANG=C
    #export LANG_ALL=C
  5. Run Parallels Products Installer:

  6. Follow the instructions on the screen to perform the upgrade. Refer to Parallels Plesk Panel Installation Guide available at if you need detailed update instructions.

8. Known Problems and Limitations

9. Contact Information

Parallels Holdings, Ltd.
c/o Parallels International GMbH.
Parallels International GmbH
Vordergasse 49
CH8200 Schaffhausen
Phone: +41-526-722-030. Fax: +41-526-722-010


For billing information, send e-mail to
For purchasing information, contact sales representative in your country. The contact information is available at
For technical support, use our Online Support Form.
To report problems with Parallels Panel software, send e-mail to
For information on career opportunities with Parallels, send e-mail to
For press contact information, send e-mail to
For information about becoming a partner, send e-mail to
For information on translating Parallels Panel into your language, send e-mail to
For general product information, send e-mail to

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This product is protected by United States and international copyright laws. The product’s underlying technology, patents, and trademarks are listed at

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