They didn't specify for the Chrome extension, but I would bet that it is the same as the client. Really be necessary – TeamViewer only ever initiates outgoing dataĬonnections through a firewall, so it is sufficient to simply blockĪll incoming connections on your firewall and only allow outgoingĬonnections over port 5938, regardless of the destination IP address. Having said that, from a security point-of-view this should not Use this to restrict the destination IP addresses that you allow However, all of our IPĪddresses have PTR records that resolve to *. Unable to provide a list of our server IPs. These servers use a number of different IPĪddress ranges, which are also frequently changing. The TeamViewer software makes connections to our master servers Mobile data provider or your WiFi router/firewall. If the TeamViewer app on your mobileĭevice won’t connect and tells you to “check your internetĬonnection”, it’s probably because this port is being blocked by your
Our mobile apps running on Android, Windows Mobile, and BlackBerry can However, our iOS apps can use port 80 if necessary. Our mobile apps running on Android, Windows Mobile, and BlackBerryĭon't use port 80. For this reason port 80 is only used as a last Uses, and there is no automatic reconnection if the connection is Reliable than ports 5938 or 443, due to the additional overhead it The connection speed over this port is slower and less If TeamViewer can’t connect over port 5938 or 443, then it will try on Port 443 is also used for aįew other things, including TeamViewer update checks. Through Group Policy, then you need to ensure that port 443 is open on Note: port 443 is also used by our custom modules which are created in However, our mobile apps running on Android, iOS, Windows Mobile, and If TeamViewer can’t connect over port 5938, it will next try to
Your firewall should allow this at a minimum. TeamViewer prefers to make outbound TCP and UDP connections over portĥ938 – this is the primary port it uses, and TeamViewer performs best These are the ports which TeamViewer needs to use: TCP/UDP Port 5938 Unknown outbound connections, and in this case you will need toĬonfigure the firewall to allow TeamViewer to connect out through it. With strict security policies, a firewall might be set up to block all However, in some situations, for example in a corporate environment Internet, which are usually not blocked by firewalls. TeamViewer makes outbound connections to the Majority of cases, TeamViewer will always work if surfing on the TeamViewer is designed to connect easily to remote computers withoutĪny special firewall configurations being necessary.
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