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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