TeamViewer through the Firewall

JoachimSpange

Hello,

I have been reading about Block all outbound traffic in Windows Firewall to ensure the safety of our remote computes connected to cellular mobile networks at remote field locations.

And I have read about Which ports are used by TeamViewer 

But can someone help, how do I put the bricks together?
Is it safe to apply this through Team Viewer and remote connection or is this something that's done when I have physical access to the computers. I would kill myself if I ruin the connection to our field instruments. #NeverTouchARunningSystem

Any experience with writing this as a batch-script? I have several computers, and I hate to do the same thing multiple times.

Thank you, Community.

Vatsilidis

Hi @JoachimSpange 

I'm not quite sure if I got it right, but I assume that you have blocked all network traffic and you want to allow only specific apps to run through, and one of them is TeamViewer app.

You can always set as a whitelist style in Windows firewall a rule to allow a specific app to run and you can select in the checkboxes next to the app if you want to allow only local network traffic or/and internet traffic to this app.

About the security, TeamViewer app is very secure (TeamViewer traffic is secured using RSA public/private key exchange and AES (256-bit) session encryption).

You can take more details about the security in this article.

I hope this solves your question about security and how to run it.

Best regards

Vatsilidis

Hi @JoachimSpange 

I'm not quite sure if I got it right, but I assume that you have blocked all network traffic and you want to allow only specific apps to run through, and one of them is TeamViewer app.

You can always set as a whitelist style in Windows firewall a rule to allow a specific app to run and you can select in the checkboxes next to the app if you want to allow only local network traffic or/and internet traffic to this app.

About the security, TeamViewer app is very secure (TeamViewer traffic is secured using RSA public/private key exchange and AES (256-bit) session encryption).

You can take more details about the security in this article.

I hope this solves your question about security and how to run it.

Best regards