Updating timezone data in Data Loss Prevention JRE software, corrects introduction of Egypt DST

Products

• Data Loss Prevention Enforce
• Data Loss Prevention
• Data Loss Prevention Network Monitor
• Data Loss Prevention Network Email
• Data Loss Prevention Network Discover
• Data Loss Prevention Endpoint Suite
• Data Loss Prevention Endpoint Prevent

Issue/Introduction

In 2023, the government of Egipt introduced back daylight saving time in Egypt. This change potentially affects timestamp information in Data Loss Prevention, as the JRE version recommended to be used with various DLP versions does not account for the change in Egypt's DST observance.

To address this issue, Data Loss Prevention administrators can update the Time Zone Database file with a file that has the latest timezone information for Egypt and for other locations around the world. This article provides instructions for updating the Time Zone Database file in the JRE software.

Symantec recommends this procedure for customers in Egypt in particular.

Environment

16.X and OpenJRE below or equal 1.8.0_352

Resolution

To update the Time Zone Database file in the JRE software used by Data Loss Prevention, follow the steps for your operating system platform as provided in this section.

Instructions for Windows Enforce and Detection Servers

1. Stop DLP Services.
2. Download the Java SE Timezone Updater Tool from https://www.oracle.com/java/technologies/javase-tzupdater-downloads.html. Download the file to an easily accessible directory, such as c:\temp.
3. Download the latest Data Only Distribution file (e.g. tzdata2025b.tar.gz) from https://www.iana.org/time-zones to the same directory where you downloaded the Timezone Updater Tool in step 1.
4. Unzip the Timezone Updater Tool.
5. Change directory to the JRE bin location. On Windows, this is typically in C:\Program Files\AdoptOpenJRE\JAVA_VERSION\bin where JAVA_VERSION is OpenJRE version running DLP services, e.g. C:\Program Files\AdoptOpenJRE\jdk8u352-b08-jre\bin.
6. Run the following command: java -jar C:\temp\tzupdater.jar -l file:///c:/temp/tzdata2025b.tar.gz
7. Restart DLP Services.

Instructions for Linux Enforce and Detection Servers

1. Stop DLP Services.
2. Download the Java SE Timezone Updater Tool from https://www.oracle.com/java/technologies/javase-tzupdater-downloads.html. Download the file to an easily accessible directory, such as /opt/temp.
3. Download the latest Data Only Distribution file (e.g. tzdata2025b.tar.gz) from https://www.iana.org/time-zones to the same directory where you downloaded the Timezone Updater Tool in step 1.
4. Unzip the Timezone Updater Tool.
5. Change directory to the JRE bin location. On Linux, this is typically in /opt/AdoptOpenJRE/JAVA_VERSION/bin where JAVA_VERSION is OpenJRE version running DLP services, e.g. /opt/AdoptOpenJRE/jdk8u352-b08-jre/bin
6. Run the following command as root: java -jar /opt/tmp/tzupdater.jar -l file:///opt/tmp/tzdata2025b.tar.gz
7. Restart DLP Services.

Additional Information

Customer can also update OpenJRE to the latest supported version by following How to upgrade JRE (Java Runtime Environment) on DLP Enforce and Detection Servers.