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What ports need to be open for the license server to work?


What ports need to be open for the license server to work?

Recently our testcomplete license server was moved inside a firewall. Port 1947 has been opened for access but still I cannot get a floating license to a TestExecute client from outside the firewall.


Is there any ports in addition to 1947 that needs to be opened in the firewall for the licensing to work?




Stein O. Rasmussen


No, port 1947 should be sufficient.  By default you need both TCP and UDP unblocked.


Assuming your server is working OK:

On the Access to Remote License Managers configuration page on the client ( http://localhost:1947/_int_/config_to.html ) try adding the IP address of the server to the Remote License Search Parameters box and  select Aggressive Search.  (click Submit) and give it a few minutes.  The server should show up on the Sentinel Keys page ( http://localhost:1947/_int_/devices.html ).


You can test if TCP is blocked by trying to connect directly to the Admin Control Center of the server.

On the client browse to: http://<IP_address_of_server>:1947


If you get a page or an active denial, you're not blocked.  If you get a timeout, you're blocked.

Community Hero

This article mentions firewalls and ports.  It might be helpful.

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Yes, it does. But unfortunately it talks about windows firewalls on the clients and servers. I am struggling with a firewall in between the clients and server.

The solution was as simple as it was stupid. The IT-department had opened port 1948 instead of 1947. When 1947 was opened, the licensing worked perfectly.


Thank you for your patience.

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