completely block TeamViewer For FortiGate

Hi.....
I need to completely block team access from outside to internal clients. I need to make sure in my network that no on uses team viewer in my network

i have Fortigate 300D
MansourIT ManagerAsked:
Who is Participating?
 
Muhammad MullaConnect With a Mentor Commented:
Under Application Control on your Fortigate, you will find 3 different signatures for TeamViewer in the Remote.Access category.

Block all of them under application overrides.
0
 
arnoldConnect With a Mentor Commented:
Identify their IP range, and block outgoing traffic to that destination.

Adding the destination with a log event....

A simpler option in an AD environment, setup a software restriction GPO blocking the running of teamviewr.exe.
Note it will not prevent a determined individual from adjusting the application name, runn.........
0
 
QlemoConnect With a Mentor Batchelor, Developer and EE Topic AdvisorCommented:
Blocking all IPs is hard to do, there are a lot of TeamViewer servers ...
Blocking the EXE itself is more promising, though easy to circumvent.
Anything else requires to analyze the traffic - very difficult, in particular with SSL.
0
 
Dr. KlahnConnect With a Mentor Principal Software EngineerCommented:
This page has a detailed explanation of one user's approach, which also short-circuits TeamViewer's fallback strategy of tunneling using port 80.

https://mediarealm.com.au/articles/2014/10/block-teamviewer-network/

However, as Qlemo points out above, if the application now tries to circumvent DNS blocking by using servers outside the teamviewer.com domain, it will probably be necessary to block the executable and hope none of your users are smart enough to rename it.
0
 
Dr. KlahnPrincipal Software EngineerCommented:
EE email requested stale question closure.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.