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Skype for Business ports for QoS classification RRS feed

  • Question

  • Hi All,

    one of our clients is using Skype for Business in their network and send the traffic through our backbone.

    I would like to remark the incoming packets so it is sure that Voice traffic goes to voice class, Video to Stream and Data to Data class. 

    The difficulty is to identify these 3 different type of traffic. Do Skype for Business uses different ports for all these different traffic?

    If yes, could you specify the exact port numbers?

    Thanks for the help!

    Friday, June 22, 2018 11:33 AM

All replies

  • Hi human374,

    SFB client use these following ports,you could refer to it.These port was distinguished by features.

    Required Client Ports

    Component

    Port

    Protocol

    Notes

    Clients 

    67/68 

    DHCP 

    Used by Skype for Business Server to find the Registrar FQDN (that is, if DNS SRV fails and manual settings are not configured). 

    Clients 

    443 

    TCP (TLS) 

    Used for client-to-server SIP traffic for external user access. 

    Clients 

    443 

    TCP (PSOM/TLS) 

    Used for external user access to web conferencing sessions. 

    Clients 

    443 

    TCP (STUN/MSTURN)

    Used for external user access to A/V sessions and media (TCP) 

    Clients 

    3478 

    UDP (STUN/MSTURN)

    Used for external user access to A/V sessions and media (UDP) 

    Clients 

    5061 

    TCP (MTLS) 

    Used for client-to-server SIP traffic for external user access. 

    Clients 

    6891-6901 

    TCP 

    Used for file transfer between Skype for Business clients and previous clients. 

    Clients 

    1024-65535 * 

    TCP/UDP 

    Audio port range (minimum of 20 ports required) 

    Clients 

    1024-65535 * 

    TCP/UDP 

    Video port range (minimum of 20 ports required). 

    Clients 

    1024-65535 * 

    TCP 

    Peer-to-peer file transfer (for conferencing file transfer, clients use PSOM). 

    Clients 

    1024-65535 * 

    TCP 

    Application sharing. 


    Best Regards,
    Leon Lu


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


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    Monday, June 25, 2018 5:24 AM
  • If you also want to know more ports about the SFB server,you could download the 

    Skype for Business 2015 Protocol Workloads Poster


    Best Regards,
    Leon Lu


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


    Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

    Monday, June 25, 2018 5:25 AM
  • Hi,

    You'll need to review the existing media port ranges.  If left at default, for the purposes of QoS planning & deployment I suggest you configure different ranges.  For example, it's beneficial for the P2P media ports to be within the same range as the server media ports.

    This may help: https://www.ucunleashed.com/2821

    Tuesday, June 26, 2018 7:32 AM
  • Hi,

     

    Are there any update for this issue, if the reply is helpful to you, please try to mark it as an answer, it will help others who has similar issue.



    Best Regards,
    Leon Lu


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


    Click here to learn more. Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.

    Wednesday, June 27, 2018 8:32 AM