Don't overcomplicate it. For 99% of users,
If TeamViewer connects, but you get slow speeds, frequent disconnects, or "Waiting for connection...": teamviewer port
Sometimes, TeamViewer might conflict with other software (like web servers or DVR systems) that also want to "listen" on ports 80 or 443. Ports and URLs used by TeamViewer Don't overcomplicate it
TeamViewer uses a specific port to establish a connection between the local and remote computers. The default port used by TeamViewer is . This port is used for communication between the TeamViewer client and the TeamViewer server. The default port used by TeamViewer is
TeamViewer usually does not require open inbound ports. It uses a technique called NAT traversal (UDP hole punching) to establish direct connections. If that fails, it simply relays the traffic through its own high-performance routers in Germany or the US.