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If both computers are on the same lan, how much external bandwith does each session use? Does the main connection just run directly between the computers over the most direct connection between each computer, say in this case, PC-Router-PC? Instead of PC-Router-Internet-Router-PC?  I know that each time a connection is made between the two computers, they both contact the TeamViewer server, but does the bulk of the transmission occur directly between the two connected devices? In short, I want to run TeamViewer on the lan continuously, without using alot of external (internet) data/bandwith. 


  • Yuri_TYuri_T Posts: 1,771 Moderator

    Hi @tjk50010 ,

    Thank you for your post.

    When establishing a session, TeamViewer determines the optimal type of connection. After the handshake through our master servers, a direct connection via UDP or TCP is established in 70% of all cases (even behind standard gateways, NATs and firewalls).

    Alternatively, you can connect via IP address so that it does not go through our server.

    You need to set up below for both of devices:
    TeamViewer software > Extras > options > General > Network settings > incoming LAN connections > please chose "accept exdusively".LAN connect 1.png

    Hope this will be helpful.

    Best regards,

    Community Moderator
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