License Server firewall ports


Our Vendor and their hosting company, before they will approve and install the License Server are wanting the firewall ports that need to be opened to allow communication from the client to the license server. In all the documentation The only information I can find is:

"In addition to the client and server installations, there is also a RemoteScan license server that needs to be installed on the same network as the server that has Active Directory. Additionally, the RemoteScan license server and the RemoteScan client must have direct IP connection."  

So, if they install the license server on a different server then the client is installed, what ports need to be opened?