Unternehmensverwaltung > Windchill ESI implementieren > Implementing Windchill ESI in an SAP Environment > Technology Considerations for Traversing WANs and Firewalls
  
Technology Considerations for Traversing WANs and Firewalls
If you are installingWindchill ESI in an environment that involves WANs and firewalls, your installation plans need to take into account how to traverse WANs and firewalls with the following software components:
TIBCO EMS
TIBCO Rendezvous
This section contains an overview of the configuration required. For detailed procedures, refer to the PDS Configuration Notes document, available from PTC, which describes the PTC Reference Architecture.