(Real time notifications, not just creating an entry into a log file) Provided we're able to set up notifications when someone uses that page to authenticate then we should be fine. I checked the Authentication menu but couldn't see anything in there to enable it externally either.
How do I edit the default authentication rule in the firebox? There's no rule/policy set up for port 4100 yet we can still access and authenticate on that page. So we'd create a new firewall rule allowing TeamViewer through for only authenticated users, and block it from our standard HTTP proxy rule. You should try it with RDP, than you will understand how it works.
Also the logging will list my username in the traffic monitor for all of my connections, that get logged.
As soon as I authenticate, no matter where I am, that port opens for the IP address I authenticated from. Until I'm not authenticated by the applet, the RDP port is closed. When you had 'from any external' in the rule, you delete this entry and add the user you created instead of an IP address or alias (can be also a user group). In the next step, you go to the 'critical rule', that you want to pass traffic only for an authenticated user. By default it is accessable only from inside the network, so you have to change the default wg authentication rule to allow access from 'any'. When you connect with a web browser to it will lounch an authentication applet. If you are using MUVPN, than you already have met with at least one of these user databases. On the FB you have an internal user database, but you can use also AD for authentication. I'll have to look into the persistent TCP connection monitoring, that looks like it could work, just how we would be able to implement it is the thing we'd need to look at. It's not that we don't want it to work, just that we'd like to know when it's being used. We can set up application blocking on our HTTP/HTTPS proxy settings to stop TeamViewer connecting at all, but we would rather just have notifications instead of blocking it completely. if connection is made to a known IP, check again in 2 seconds, if still persistent connection, then a support session must be active, so then command-line email yourself: since the first two ports are used for web surfing, I don't see how you can effectively alert off of that.Īnother approach might just be to block teamviewer.(com|net) via DNS or your firewall, which will prevent them from using it at all, then they have to ask you to unblock before they are allowed to connect.Īnother approach might be to find when TeamViewer.exe has a persistent TCP connection to (wherever it does) and then alert off of that, on the local machine/server you could run a batch every X minutes via a scheduled task, something like. TeamViewer uses 80, 443, and 5938 if you force it, see:
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