Forum Discussion
Split Tunnel Implemented. But, some of the traffic still going via VPN
Hi, I am new to Microsoft Teams and I am wondering why some of Microsoft Teams traffic and going straight to the internet and some are going via VPN. We use Cisco AnyConnect and has configured dynam...
DNS isn't sufficient, media traffic goes straight to IP addresses and doesn't make use of DNS. Look at Rule 11 in the Microsoft list Office 365 URLs and IP address ranges - Microsoft 365 Enterprise | Microsoft Docs
UDP 3478-3481 is the destination ports used for Teams media, 50,000 - 50,059 are source ports if you choose to configure Team to force those. It's generally not the case that you use source in a VPN/firewall.
You do need to review the Microsoft list very carefully, and for Teams to work fully you need to consider all the different sections (Teams relies on Exchange, SharePoint and the common services).
Hi Steven,
Sorry, I was not able to reply to you. When you say Rule 11 (you mean ID 11? "Optimised IP's 13.107.64.0/18, 52.112.0.0/14, 52.120.0.0/14"). I think we've also added these IP's together with the DNS's. But, was still getting the same result. I will review the rules again and will come back to you. Thank you for advise.
Sorry, I was not able to reply to you. When you say Rule 11 (you mean ID 11? "Optimised IP's 13.107.64.0/18, 52.112.0.0/14, 52.120.0.0/14"). I think we've also added these IP's together with the DNS's. But, was still getting the same result. I will review the rules again and will come back to you. Thank you for advise.