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Teams ports

Moudar SDS 6 Reputation points
2022-03-23T13:07:38.327+00:00

Hi!

We are using Checkpoint firewall. UDP ports 3478-3481 are open and using updateable objects to allow STUN traffic.

The question is about UDP ports like 10400, 10500, 10600, 10700 etc. We can't open these ports and still there is traffic from Microsoft that go through these and being dropped because this traffic is trying to talk directly with the firewall, i mean it is the Stealth rule . Check

https://www.pearsonitcertification.com/articles/article.aspx?p=387728&seqNum=3#:~:text=A%20Skeleton%....

This traffic source is from IP addresses ranges like 52.114. or 52.112 and being droped.

Can this traffic affect the quality of Teams video or audio meetings because we had some people that had problems with that?

I can't find any documentation from Microsoft that talk about these UDP ports!

Microsoft Teams | Microsoft Teams for business | Other
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  1. Daniel Kåven 696 Reputation points
    2022-03-23T23:15:14.557+00:00

    Not sure if this is the source you're looking for, but here is a link to the IP-adresses and ports used by Microsoft Teams:
    https://learn.microsoft.com/en-us/microsoft-365/enterprise/urls-and-ip-address-ranges?view=o365-worldwide#skype-for-business-online-and-microsoft-teams

    1 person found this answer helpful.
  2. Moudar SDS 6 Reputation points
    2022-03-24T08:48:24.793+00:00

    Maybe it will be better to attach a screenshot to explain the problem
    186378-image.png

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