Teamviewer Blocked By Firewall Jun 2026

Sometimes, the "block" isn't technical—it's licensing. If TeamViewer’s servers detect what they believe is commercial activity on a free account, they may block your connection.

Thanks in advance.

In conclusion, TeamViewer being blocked by a firewall is a common issue that can be resolved by checking firewall settings, adding TeamViewer to the firewall whitelist, disabling antivirus software, and contacting the network administrator. By following the solutions and troubleshooting steps outlined in this report, users should be able to resolve the issue and establish a connection using TeamViewer. teamviewer blocked by firewall

Allow *.teamviewer.com and *.tvcdn.com via DNS whitelist if using SSL inspection.

I’m trying to use TeamViewer (full version) but it appears to be blocked by our corporate firewall. Inbound and outbound connections are failing, and I’m getting error code [e.g., 2075 / 2077] . Sometimes, the "block" isn't technical—it's licensing

Your session times out after 5 minutes or won't start at all.

Locate TeamViewer and set its access to or "Trusted." 4. Address the "Commercial Use Suspected" Block In conclusion, TeamViewer being blocked by a firewall

If you are in a corporate environment, you may need to ask your IT department to whitelist *.teamviewer.com . 3. Check Third-Party Antivirus