How To Block Teamviewer

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by wookiee, Mar 30, 2009.

  1. wookiee

    wookiee Network Guru Member

    I have a RV042 and an employee that uses teamviewer to access his pc at home. He spends way too much time on it and I would like to block teamviewer from working. I am not sure if this is possible since it looks like it uses port 80.

    I know we can tell him to stop using it but, I would like to be able to know a way to block these sort of thing in the future. It would be nice to tighten down the entire network.

    Any ideas?
  2. jent

    jent Addicted to LI Member

    I am not sure there is an easy way to block it. I don't have that router and don't know it's features. But I think that application runs through the normal port 80. So unless you want to block all http traffic you can't block it based on port. Maybe your router supports blocking by URL?
  3. Sfor

    Sfor Network Guru Member

    The RV042 does support URL blocking. But, it is quite low possible the home IP would have an URL assigned. If the home IP is a static one, it should be possible to block it completely. Or to block port 80 for just the one IP with the "Firewall - Access Rules" function.
  4. Sandokan

    Sandokan Addicted to LI Member

    For the moment, you could modify the file "hosts" of his pc to redirect the teamviewer URL to a fake IP address.

    something like:

    Should work...

  5. Sfor

    Sfor Network Guru Member

    I do not know much about the Teamviewer. But, there are two cases possible.

    - if the connection is made directly with the home pc it is possible to lock it by the firewall access rules by banning a particular IP.
    - if the connection is made through the team viever service server, it is possible to lock the whole team viewer service.

    The RV042 firewall functions are quite good and effective.
    - the content filter locks domains by matching the URL (I'm using it to stop commercials and banners).
    - the access rules can lock particular port ranges depending on source and target IP. So, it is possible to lock a particular service for a particular local computer or remote IP.
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