Cannot Connect the Client Machine to the License Server

Symptom:

Receiving the following error message when attempting to connect a client machine to the license server.

“Authentication Failed

Unable to authenticate a license for LP360 for the following reason:

Unable to connect to the LP360 License Server machine. Please check that it is on-line and reachable from this machine.

LP360 will run in Viewer mode until the License Server can be contacted (You may be asked to register for the Viewer if this is the first time you have run in Viewer mode) (22650)”

 

Probable Resolution:

There are three options for fixing these error messages. They are presented here in the order of what should be tried first.

Option 1:

More than likely these error messages are occurring due to the fact the LP360 License Server Service is not started on the Server Machine. This option walks through checking the status of the service on the LP360 License Server machine.

  1. Open Computer Management on the License Server Machine (from the Start Menu -> Administrative Tools, select Computer Management or right-click on Computer and select Manage).
  2. Select Services and Applications -> Services.
  3. Locate LP360 License Server service.
  4. If not started, start the service.
  5. If started already, restart the service.

Option 2:

The second option is to use the IP address instead of the computer name for the License Server.

  1. From the Start Menu -> All Programs -> QCoherent -> LP360, select the LP360 License Administrator. Right-click and select “Run as Administrator”.
  2. On the License tab, select the option “Use License Server”. Type in the IP address of the machine that contains the LP360 License Server and select Set License Server.
  3. If the set-up was the successful the following message will appear, “Successfully completed setting up the floating license client.”

Option 3:

The other likely reason for the error messages is that there is a firewall in place that is stopping the connection between the client machine and the server machine. The steps below describe how to allow the needed programs and ports through for Windows Firewall only. If there is a separate firewall in place, local IT departments will need to be involved to add the following programs and ports through:

  • LicServer.exe, LicServerProxy.exe and TCP Port assigned to the LP360 License Server during installation of the authorization file (versions 2011.1 or newer);
  • LicServer.exe, LicServerProxy.exe and TCP Port #1234 (versions 2.0 or previous).
  1. From the Start Menu -> Control Panel -> System and Security, select Windows Firewall.
  2. On the side panel select the option Allow a program or feature through Windows Firewall.
  3. Select the Allow another program… button.
  4. Select the browse button and go to:
  • C:\Program Files\Common Files\QCoherent (version 2011.1 and newer).
  • C:\Program Files (x86)\LP360\bin (64-bit machine) or C:\Program Files\Common Files\QCoherent (32 bit machine) (version 2.0 or older).
  1. Select LicServer.exe and click Open.
  2. Choose the Network Location Types… and check the box to indicate which network location to allow the program through.
  3. Select Add.
  4. Select the Allow another program button.
  5. Select the browse button and go to:
  • C:\Program Files (x86)\Common Files\QCoherent (64-bit machine).
  • C:\Program Files\Common Files\QCoherent (32-bit and 64-bit machines)
  1. Select LicServerProxy.exe and click Open.
  2. Choose the Network Location Types and check the box to indicate which network location to allow the program through.
  3. Select Add.
  4. Go back to the main Windows Firewall window.
  5. Select Advanced settings.
  6. Select Inbound Rules.
  7. Right-click and select New Rule.
  8. Under What type of role would you like to create select port and then next.
  9. Select TCP and then type in the port number under Specific local ports and select next:
  • the port specified for the LP360 License Server during installation of the Authorization file (versions 2011.1 or newer), default is “1234”
  • For version 2.0 and earlier, “1234”
  1. Select Allow the connection and then select next.
  2. Select when the rule applies on which networks and/or domains and select next.
  3. Name the rule and click Finish.
  4. Select Outbound Rules.
  5. Right-click and select New Rule.
  6. Under “What type of role would you like to create?” select port and then next.
  7. Select “TCP” and then type in either the default “1234” (versions 2.0), or the port specified for the LP360 License Server (versions 2011.1 or newer) under Specific local ports and select next.
  8. Select “Allow the connection”, and then select next.
  9. Select when the rule applies on which networks and/or domains and select next.
  10. Name the rule and click Finish.
  11. All programs and ports necessary for LP360 have now been allowed through Windows Firewall. Attempt to connect the client through License Administrator.
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