Product Documentation

Configure firewalls

Feb 04, 2016

With the HDX RealTime Optimization Pack for Microsoft Lync, the HDX RealTime Media Engine runs on the user device. The HDX RealTime Media Engine performs Signaling and Media transmission. To help you understand which ports are used by the HDX RealTime Media Engine for supporting external users, equate running the HDX RealTime Media Engine with running the Microsoft Lync client locally on the user device. The difference is XenApp and XenDesktop host the UI and business logic layers. Understanding that the media engine is running on the remote endpoint clarifies the port requirements.

External users outside of the corporate firewall connect to the Lync Edge Server, a component of Lync Server infrastructure that must be installed on a dual-homed server in the DMZ with connections to both the Internet and to the intranet. The port requirements are listed at: http://technet.microsoft.com/en-us/library/gg425891(v=ocs.14).aspx.

To find the Lync Edge Server, the HDX RealTime Media Engine follows the same procedures as the Lync client. See "How Lync Clients Locate Services" at http://technet.microsoft.com/en-us/library/gg398758.aspx.

Internal users inside the corporate firewall connect directly to the Lync Server that runs inside the firewall. They also communicate point-to-point between other Lync clients during calls. If your company has internal firewalls, you must make sure that the proper ports are open to connect with the Lync Server and to transmit and receive media during calls. The port requirements are listed at: http://technet.microsoft.com/en-us/library/gg398833%28v=ocs.14%29.aspx.