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TeamViewer Blocking

samhtur
Hi Guys,
Is there a way to block TEAMVIEWER in my AS425? TEAMVIEWER can easily remote client computers even its already behind my firewall. Thanks!


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  • 0
    If you are using Web Proxy, you may be able to block Teamviewer (without using Application Control) by blocking following URLs:

    ^https?://(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})/din.aspx\?s\=
    ^https?://(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})/dout.aspx\?s\=
    ^https?://[A-Za-z0-9.-]*teamviewer.com/din.aspx\?s\=

    Did the Trick for me. You should at least scan HTTP traffic. Probably it's also necessary to use HTTPS scanning, to block same URLs via HTTPS (Not sure, if Teamviewer also uses HTTPS as Fallback - I'm using HTTPS scanning anyway)

    Lets give it a try. If Teamviewer still is able to connect, it's maybe also using a open Firewall Port - I use a very strict outgoing ruleset ;o))
  • 0 in reply to Sascha Paris
    If you are using Web Proxy, you may be able to block Teamviewer (without using Application Control) by blocking following URLs:

    ^https?://(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})/din.aspx\?s\=
    ^https?://(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})/dout.aspx\?s\=
    ^https?://[A-Za-z0-9.-]*teamviewer.com/din.aspx\?s\=

    Did the Trick for me. You should at least scan HTTP traffic. Probably it's also necessary to use HTTPS scanning, to block same URLs via HTTPS (Not sure, if Teamviewer also uses HTTPS as Fallback - I'm using HTTPS scanning anyway)

    Lets give it a try. If Teamviewer still is able to connect, it's maybe also using a open Firewall Port - I use a very strict outgoing ruleset ;o))


    Yep Sir works
Reply
  • 0 in reply to Sascha Paris
    If you are using Web Proxy, you may be able to block Teamviewer (without using Application Control) by blocking following URLs:

    ^https?://(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})/din.aspx\?s\=
    ^https?://(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})/dout.aspx\?s\=
    ^https?://[A-Za-z0-9.-]*teamviewer.com/din.aspx\?s\=

    Did the Trick for me. You should at least scan HTTP traffic. Probably it's also necessary to use HTTPS scanning, to block same URLs via HTTPS (Not sure, if Teamviewer also uses HTTPS as Fallback - I'm using HTTPS scanning anyway)

    Lets give it a try. If Teamviewer still is able to connect, it's maybe also using a open Firewall Port - I use a very strict outgoing ruleset ;o))


    Yep Sir works
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