Ports and Protocols for Lync Server 2010

Recently I had the opportunity of participating in a Pilot of Lync Server in a customer that has the internal network segregated by firewalls. So, one of the first questions was about the ports and protocols used by Lync Server.

The requirements of this pilot included:

  • Co-existence with OCS 2007 R2
  • Exchange 2010 Unified Messaging
  • External Access
  • Integration with existing video-conference infrastructure
  • All the UC workloads

The ports and protocols used by Lync are pretty well documented in the following TechNet pages:

Additionally, the Microsoft Lync Server 2010 Protocol Workloads Poster does a very good job illustrating not only the ports and protocols used by each UC workload, but also their dependencies and relationships.

Instead of letting the customer compile and aggregate all the provided technical information, we decided to provide some Visio drawings, in order to facilitate the configuration tasks of the security team. In the end we delivered the following schematics:




Please note that these were built for a pilot and not for a Production environment, thus minor errors/inconsistencies may have been depicted. If you find one, please let me know.

If you want the Visio document, it can be downloaded here.

Comments (3)

  1. Thanks for pointing that out Richard. You are absolutely right, it has now been corrected.

  2. Richard says:

    as there is no arrow between the internal user and the edge internal leg, I doubt this setup was successful for external and internal user communication scenario, IF there was a firewall between internal clients and edge internal leg, using "default deny" firewall config.

  3. Johann Deutinger says:

    In a Lync environment with Exchange UM for voicemail there is no connection needed between VoIP gateway and Exchange – at least if inbound fax is not used which typically also would require separate extension numbers.

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