Licenses on a Sentinel license server
By default, clients can access all Sentinel license servers running in the same subnet. If you operate several subnets or want to restrict the access of clients to a license server, you have to control the access accordingly.
License server communication
Communication between a license server and the respective clients requires TCP/IP. To detect a license server, clients use UDP broadcasts. Further communication uses TCP.
Make sure incoming and outgoing network traffic for TCP port 1947 and UDP port 1947 is allowed between the license server and the respective clients.
License server access
To control access to the license server, you have the following options:
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Configure licensing across subnets: Configure clients such that they perform a broadcast search across the whole network when trying to obtain a license.
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Restrict access on the server side: Configure a Sentinel license server such that only specific clients can access it.
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Restrict access on the client side: Configure a client such that it can access only a subset of the available license servers.
The license server has to run permanently. It does not necessarily need a PLA 3.0 installation. For terminal server solutions, this could be the terminal server itself.
