If you have followed the instructions for installing and setting up the Autodesk Network License Manager On your server but the user machines still cannot grab a license file. Here is a blog written by Jeff Lotan covering "How can I tell if a port needed by flexlm is open or not?"
If you are still having issues you will want to create an exception on the servers firewall for first inbound.
On the server, go to your Start Menu > Control Panel > click on System and Security or Window Firewall. If you clicked on System and Security you would then click on the Green Windows Firewall.
Then you will click on the link on the left side of the dialog box that says "Advanced settings". Inside the "Windows Firewall with Advanced Security" dialog box you will need to create Inbound and Outbound rules for the Autodesk ports and for the LMTools software.
NOTE: You can first set up the Inbound exceptions then if your users are still not able to obtain a license you can do the outbound.
Inbound and Outbound rules for the Autodesk LMTools software
You will start by clicking on Inbound Rules to start > then on the right side click on New Rule….
You will first create a "Rule Type" I am starting with the Ports so I click on the button for Port and then click the Next button.
On the "Protocol and Ports" screen leave it set to TCP and Specific local ports. Type 2080, 27000-27009 and click the Next button.
On the "Action" screen click on "Allow the connection" then click the Next button.
On the "Profile" screen Leave all the Profiles checked for the rules apply to and click the Next button.
Next you will name your rule; you can give it any name you want I typically call it Autodesk inbound rule for Ports once you give it a name and an optional description click the Finish button.
You will now do the exact same thing but for the "Outbound rule's for the ports. Make sure you give the rule name the word “outbound” so you or anyone else seeing this will understand what it is.
Inbound and Outbound rules for the Autodesk LMTools software
You will start by clicking on Inbound Rules to start > then on the right side click on New Rule….
Instead of click on Port for the Rule type click on Program and then click the Next button.
On the "Program" screen you will then click on "This program path:" and click on the browse button. You will be making a new rule for each of the four .exe files located in the C:\Program Files\Autodesk Network License Manager. The four files are adskflex.exe, lmgrd.exe, lmtools.exe and lmutil.exe.
Remember you will make four different inbound rules for these programs and four outbound rules for them as well.
Select on the first one which will be adskflex.exe, the order in which you create your rules for these programs doesn’t matter just as long as each one of these gets an inbound and outbound rule.
After you click the Next button you will now be on the "Action" screen. You will select "Allow the connection" and click the Next button.
For the Profile keep all the profiles checked and click the Next button.
Now give your rule a name. Always indicate if it's an inbound or outbound with a rule name. Example; adskflex.exe inbound rule. When you have named your rule click the Finish button. You will then create another inbound rule for the next .exe.
