Issue:
When you start an Autodesk product for Windows, you see the following
error message:
Establish an Internet connection to
continue
The Autodesk license server cannot be
found. This problem can be caused by a variety of issues, including:
·
Internet connectivity has been
lost.
·
The Autodesk license server is
temporarily unavailable.
Causes:
There are many reasons for Internet connection problems. The solutions
for the most common causes are listed below.
Solution:
Solution 1: For
Autodesk 2014 and 2015 products, install the licensing security hotfix
1.
If you have a 2014 or 2015 product and
haven’t applied the Autodesk POODLE hotfix, do so now.
2.
Follow the steps in Security Settings
under Solution 2.
Solution 2: Check
your browser settings LAN settings (required in all cases)
1.
Find the LAN settings in your browser.
·
In Chrome, go to Settings > Advanced
> System > Open Proxy Settings > Connections > LAN Settings.
·
In Internet Explorer, go to Tools >
Internet Options > Connections > LAN Settings.
Alternatively, select Internet Options in the Network control panel and
click LAN settings in the Internet Properties dialog.
2.
Confirm that Automatically
detect settings is not selected. The dialog should
look like this:
Security settings (required if you've applied the POODLE hotfix in Solution 1
or have an Autodesk 2016 or later product.)
1.
In your browser settings, find the
setting for SSL (Secure Sockets Layer) 3.0.
·
In Chrome, go to Settings > Advanced
> System > Open proxy settings > Advanced > Settings > Security.
·
In Internet Explorer, go to Tools >
Internet Options > Advanced > Settings > Security.
Alternatively, select Internet Options in the Network control panel and
click the Advanced tab in the Internet Properties dialog.
2.
Scroll down to Use SSL 3.0 and
confirm that it is selected.
Solution 3: Check
your proxy server settings
If your network firewall allows Internet access only through a proxy
server, change the settings on your browser to allow access to the
Autodesk licensing server.
1.
Find the LAN settings in your browser.
·
In the Chrome menu, go to Settings >
Advanced > System > Open Proxy Settings > Connections > LAN
Settings.
·
In Internet Explorer, go to Tools >
Internet Options > Connections > LAN Settings.
Alternatively, select Internet Options in the Network control panel and
click LAN settings in the Internet Properties dialog.
2.
Under Proxy Server, make sure that Use
A Proxy Server For Your LAN is selected
3.
Click Advanced.
4.
In the text box under Exceptions on the
Proxy Settings dialog, enter these
domain addresses.
Important: if your network uses WPAD (Web Proxy Automatic Discovery) to
configure proxies, enable proxy detection. Autodesk
licensing components disable WPAD proxy detection because automatic detection
can degrade performance in networks without proxy servers.
Solution 4: Uninstall
any adware or malware on your computer
One or more of the following may be on your
computer. You can search the Internet for ways to uninstall them.
·
If Trovi Search Protect is
installed on your computer, uninstall Trovi. Trovi is a
browser hijacker that you may have installed along with legitimate software.
·
If Wajam is installed on your
computer, uninstall Wajam. Wajam is adware that displays
social media posts in search results.
·
If DNS Unlocker is
installed on your computer, uninstall DNS Unlocker. DNS Unlocker is
malware that displays pop-up ads and advertising banners.
Solution 5: Confirm
that a required port on your computer is open
1.
Install Windows Telnet.
a.
Open a Command prompt window. (On
Windows 10, right-click Start and select Command prompt.)
b.
Enter the following at the Command
prompt:
·
pkgmgr
/iu:"TelnetClient"
c.
If you see the User Account Control
dialog, click Yes to accept.
d.
Click Continue.
e.
When the Command prompt appears again,
the installation is complete.
2.
Run Telnet.
a.
Open a new Command prompt window.
b.
Type the following into the Command
prompt window:
·
telnet cur.autodesk.com
443
c.
If you connected successfully, you see
a blinking cursor. If not, close the Command prompt window and try again. You
may have to try several times.
d.
Contact your system administrator if
you still can’t connect.
Solution 6: Try
additional troubleshooting measures
If the previous solutions don’t solve your problem, try each of the
following, one at a time. Test for success before trying the next one.
·
Shut down your computer and log in to
Windows again.
·
Check that the local time setting is
accurate on the Date and Time control panel.
·
Check with your system administrator to
find out if any of the following are blocking your connection.
o
A proxy server
This article lists the supported proxy configurations for a single-user access
license in a secured proxy environment.
·
Firewall security settings
·
Antivirus software
·
Go to the following locations and
remove the specified files:
·
C:\Users\\AppData\Roaming\Autodesk—Delete
the ADUT folder.
·
C:\ProgramData\FLEXnet—Delete the three
files whose names begin with adskflex.
·
C:\Users\\AppData\Local\Autodesk\Web
Services—Delete LoginState.xml.
Note: If you don’t see a file, it may be hidden. To make it
visible, follow these instructions.
·
If you have administrator privileges on
your computer:
·
Right-click the product icon and select
Run As Administrator.
·
Close the program and reopen it
normally.
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