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NAT should work fine. Can you PING the server from behind the NAT? You need to allow ports 2080 and 27000 thru the NAT forwarded to the NLM server. No other protocols should be using this ports anyway. You can either point to the NAT and port forward or open the ports and access to the server thru the NAT. You might need to increase the FLEXLM_TIMEOUT system variable with the extra hops.
Let me know what errors or problems you are getting.
Travis Nave
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It certainly wouldn't hurt to set the variable. You can at least try it as a test.
You can also check port connectivity from the client to the server by using Internet Explorer (not 3rd party browsers.)
Simply open IE and go to the following address ports:
http://servername:27000 - LMGRD Master Daemon
http://servername:2080 - ADSKFLEX Vendor Daemon
Just replace servername with the hostname or IP addres of your NLM server. When you do so, you should receive a page with jargon that looks similar to this on both:
Wê-60Wê-60Wê-60Wê-60Wê-60Wê-60Wê-60
This will at least verify that there is no connectivity, firewall, or other problem impeding your path. If you get a 'page cannot be displayed' error, then you should probably look into it.
Assuming this works, try setting the FLEXLM_TIMEOUT system environment variable to 1000000 and give it another test.
http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=7574782&linkID=9240617
Are you getting any specific error at the client?
Travis Nave
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Try setting the LICPATH.LIC to the IP address of the server. If you're getting -15 error, it is usually connectivity. Since your ports to 2080 and 27000 are working, there is something else going on. You can try increasing your FLEXLM_TIMEOUT by more as well. Each million delays the timeout by one second.
What do you get when you PING the server? IPv4 of the NAT or the NLM Server? Or do you get IPv6?
Travis Nave
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It's good that you get a ping response from the NLM server. That proves connectivity. You might also set the ADSKFLEX_LICENSE_FILE variable with the @servername. You can also use the IPv4 address here too.
My NLM server is behind a NAT, so I know this works.
Travis Nave
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Shouldn't really matter who is behind what. So long as there is connectivity, it could be a NAT, Router, VPN, or a can and string. If you can PING the NLM and have access to ports 2080 and 27000, then you should be able to get a license. Most often the problem is either Firewall or timeout.
Travis Nave
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Double check the client and make sure that the system environment variables are set correctly for FLEXLM_TIMEOUT and for ADSKFLEX_LICENSE_FILE
http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=7574782&linkID=9240617
http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=8385605&linkID=9240617
Make sure @SERVERNAME is the hostname of your NLM server. These two variables solve the license finder box almost 99% of the time based on your description.
Travis Nave
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If correctly set on the client, your problem should be resolved if connectivity is indeed working.
Travis Nave
Need help in your post? Mention me with @TravisNave HOT: Named User FAQ | 2025 Download Links | Invalid Serial Number | LiteHTML.DLL error | Reset Autodesk 2020-24 Licensing
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That's the hope! 
Travis Nave
Need help in your post? Mention me with @TravisNave HOT: Named User FAQ | 2025 Download Links | Invalid Serial Number | LiteHTML.DLL error | Reset Autodesk 2020-24 Licensing
My Expert Contributions to the
FLEXnet License Admin | MSI Cleanup Utility | .NET Framework Cleanup Tool | IPv6 NLM Fix | adskflex.opt Options File | Combine .LIC Files
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