Forum Discussion

train-IT's avatar
train-IT
MCT
May 21, 2024

Microsoft Tunnel is connected, but no traffic goes trough

When creating a Microsoft Tunnel Server as a VM in Azure using the Deployment Guide (Download Microsoft Tunnel Deployment Guide v2 from Official Microsoft Download Center) my Android and iOS Devices ...
intune
Tunnel
pkecun's avatar
pkecun
Copper Contributor
Jul 13, 2024

train-IT did you find a resolution to this in the end?

 

I've set this up on-prem and it "just worked" yesterday. 

 

Tried it again today and now experiencing the same as you - iOS VPN connects but no traffic over it. But the linux server can ping and reach everything just fine, as can the container.

 

My MS Tunnel Server is on Ubuntu 22.04 (but have also tried RHEL9.4 and Ubuntu 20.04) and nothing seems to help. 

 

I wish there were a few more troubleshooting articles for this!

train-IT's avatar
train-IT
MCT
Jul 13, 2024
Yeah, the doc (pdf) is 2 years old, and is of bad quality. Seems be a rearly used feature. Well tomorrow i'll give it another try because of a new training - let's see if it works. Regards, Michael
  • pkecun's avatar
    pkecun
    Copper Contributor
    Jul 15, 2024

    train-IT I got this working but it's not ideal.

     

    The issue I had with the VPN connection but nothing routed was ultimately resolved by changing the server configuration to disable UDP usage and also closed the UDP port - routing then worked as expected. Not sure why that was necessary given I have another client/location where this wasn't necessary with a practically identical setup.

     

    The only frustration I have is that I had hoped this would be a good solution for allowing iOS RD Client to connect to internal RemoteApp / Session Hosts - it works but there's a lot of latency (screen-updates appear fairly fast but there's about 1 second of input lag, i.e move mouse over the minimize/maximize buttons and it can take 1-2 seconds for them to highlight) which is super frustrating. Have tweaked just about every setting I can think of to improve this at both locations to no avail.