Warning

Zephyr Enterprise must run in an isolated instance where there is no Jira running or any other Tomcat.

Zephyr Enterprise should only be installed on its own server. If you are running a Jira instance, it should be installed on a different server.
We recommend you to have Zephyr Enterprise installed on a separate instance from where you have your Jira/Tomcat installed.

...

OS	Windows Server 2008 / 2012 / 2016 / 2019 Windows 7 Enterprise / Windows 8 Enterprise / Windows 10 Enterprise
CPU	Quad-core CPU Intel Pentium or AMD Opteron (2 Ghz or higher)
RAM	Minimum 8 GB; Preferred 12 GB RAM recommendations can be found here
Disk Space	At least 5 GB free (250 GB-1 TB recommended for large enterprise installations)
Networking	Wired Ethernet Static IP address REQUIRED† Ports: 80, 443 (if HTTPS) Firewall (if present): Allow ports 80, 443 (if HTTPS). Must support WebSocket protocol Proxy (if present): Must support WebSocket protocol
Account	Administrator access to the machine Installer and services needs to "Run As Administrator"
Software	Java: OpenJDK 8 (recommended) or Oracle JDK 8 Oracle JDK must be JDK 8u101 or higher. JRE is not supported. See also Note on Oracle JDK License Update Note: No other Tomcat or MySQL can be installed on the machine.††
Database	MySQL 5.6 or 5.7 series

Zephyr Enterprise Server (for Linux On-Premise installations only)

OS	Red Hat Enterprise 64-bit CentOS 64-bit Ubuntu/Debian 64-bit SUSE/openSUSE 64-bit
CPU	Quad-core CPU Intel Pentium or AMD Opteron (2 GHz or higher)
RAM	Minimum 8 GB; Preferred 12 GB
Disk Space	At least 5 GB free (250 GB-1 TB recommended for large enterprise installations)
Networking	Wired Ethernet Static IP address REQUIRED† Ports: 80, 443 (if HTTPS) Firewall (if present): Allow ports 80, 443 (if HTTPS). Must support WebSocket protocol Proxy (if present): Must support WebSocket protocol
Account	Superuser (root) access to the machine Installer and services needs to run as "root"
Software	Java: OpenJDK 8 (recommended) or Oracle JDK 8. Oracle JDK must be JDK 8u101 or higher. JRE is not supported. See also Note on Oracle JDK License Update MySQL Connector - JDBC 5.1.40 Note: NO other Tomcat or MySQL can be installed on the machine.††
Database	MySQL 5.6 or 5.7 series

Zephyr Client

OS	Any Desktop OS
Browser	Any one of these versions that support WebSockets: Chrome Firefox Internet Explorer 11 (not recommended)
Networking	Client machine must have access to port 80 for HTTP connection (or 443 for HTTPS) to the Zephyr Server
Other	Screen resolution of 1280x1024 (1280x900 for widescreen) or higher

...

80, 443(if HTTPS), 8005 and 8009 are used by tomcat and can be configured in the server.xml file under zephyr\tomcat\conf\
3306 is used by MySQL in Linux and configured in the my.cnf
9300 9200 is used by Elasticsearch
5701, 5702, 37000, 37001 are used by Hazelcast

...

Elasticsearch is required to install Zephyr Enterprise Server. Supported Elasticsearch versions are 6.8.1–6.8.11.The supported Elasticsearch version is 7.9.2
The MySQL software has to be the major/minor (5.6.X or 5.7.X) version.
- No other MySQL should be present on the server instance.
Oracle JDK must be JDK 8u101 or higher. JRE is not supported.
Zephyr Enterprise Server for Windows includes MySQL in the installation package on top of allowing remote MySQL.
Zephyr Enterprise Server for Linux requires a separate installation of MySQL not included in the installation package on top of allowing remote MySQL.