Teams outbound traffic blocked only on WiFi - No blocks in logs

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Topher

• June 17, 2024 19:02

I have 2 devices that cannot seem to send messages via Microsoft Teams (Enterprise) only when on the WiFi. I have a Firewalla Gold Plus and there are no blocks shown in any of the traffic logs.

Both devices Android, 1 Pixel 8 Pro and 1 Samsung S22 Ultra (both running latest OS)

box version 1.978
app version 1.61.88
cloud instance v3
Nothing but default Active Protect enabled / applied

Any suggestions?

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  Firewalla

  • June 17, 2024 19:08

  Have you tried to turn on emergency access mode on those devices? if that still not work, your problem is likely outside of the firewalla.

  (try change your DNS, or disable IPv6)

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  Topher

  • June 17, 2024 19:16

  Yes, tried emergency access and have even disabled monitoring on each device, no change.

  I'll try disabling IPv6, hadn't thought of that

  Since it is possible this block is upstream with my ISP I'll inquire if they see anything. 
  
  

  Thank you

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  Firewalla

  • June 17, 2024 22:25

  After you disable emergency access, make sure you flush the DNS cache. (turn off and on wifi will do the trick)

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  Topher

  • July 29, 2024 17:46

  I've tried the emergency access, I have flushed DNS cache, Teams cache and all the usual things. I've contacted my ISP who cannot locate or determine any blocks or problems.
  
  This problem also exists on Skype mobile and Hotmail mobile, all of which work when turning off WiFi. 
  
  While out of town this past week both my wife and I realized Teams (and Skype) was working while on WiFi so am confident it's something within our FWG router. I just submitted a support request from my Firewalla app on my mobile. Hoping someone can assist in identifying the cause

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  Firewalla

  • July 29, 2024 22:38

  Do you have ipv6 enabled? if you do, try to turn it off. 

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  Topher

  • July 29, 2024 22:47

  I did have it enabled. Turned IPv6 off and everything works! That solved the issue, problem is gone. 

  Amazing. I've had 2 support sessions with my ISP, multiple tickets into Microsoft with the same BS responses, none of which helped. Firewalla support solved the problem is a few short hours. I am so freaking impressed with your support. THANK YOU. 

  Yay

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  Chris Irving

  • October 09, 2024 17:01

  I had the same issue with sending Teams messages from my phone and seeing the messages I successfully sent from my work laptop connected to a VPN. All other messages were received correctly.  I resolved the issue by turning off Unbound DNS. 

  Is there a way to see logs from Unbound DNS? Perhaps I can add a custom rule to allow this to work and still be able to use Unbound.

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  Firewalla

  • October 09, 2024 21:07

  Very strange for sure. Likely some of the DNS services are overriding DNS lookups 

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  Chris Irving

  • March 01, 2025 22:31

  Issue has crept up again for me. All DNS caching and related features are off. It is only an issue from my phone while connected to WiFi. It works fine on mobile data and other Wi-Fi networks. Also turned off ad blocking and active protect. Nothing in the firewall logs. Currently trying to access modem logs. Annoying issue.

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  Firewalla

  • March 01, 2025 22:52

  Have you tried emergency access on for the device? if you tried that, have you tried changing the DNS used on your LAN? also turning off ipv6?

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