Zebra Tester contains four built-in server components which are started on your local computer

Local Architecture


  • Proxy Sniffer: A special proxy server used to record Web surfing sessions.
  • Web Admin: An embedded, local Web server for the GUI.
  • Exec Agent: A server which supports the execution of load test jobs.
  • Job Controller: A server which allows combining several load-releasing machines into a cluster.

The following TCP/IP server ports have been set up on your local system:

Port Number Port Description
7990 Embedded Web Server, GUI (web admin)
7993 Load Test Execution Server (exec agent)
7995 Load Test Cluster Controller (job controller)
7996 (optional) REST API Server (proxy sniffer)
7998 Internal communication port (proxy sniffer)
7997 HTTP/S Proxy Port (proxy sniffer)
7999 (deprecated) HTTP Proxy Port, HTTP only (proxy sniffer)

Note: The ZebraTester Console application execute all of these four server components as integrated threads.

Distributed Architecture


Remote execution of load tests, as well as combining several Exec Agents (load generators) to a load generating cluster, is supported in an easy and transparent way.

On remote systems normally only Exec Agent is installed and started. They are normally running on port 7993 when plain TCP/IP connections are used or on Port 80 or 443 when HTTP/S connections are used for the internal ZebraTester communication between your local system and the remote Exec Agents – but any other TCP/IP port can also be configured. Please note that you have to enable the corresponding inbound firewall rule on the remote systems.