Installation R2021a behind proxy fails

Starting the installer stops with the following error:

The following error was encountered while trying to retrieve the URL:http://localhost:32415/ui/install/matlab_installer/matlab_installer/index.html?

Connection to ::1 failed

The system returned: (111) Connection refused

Disabling the proxy, the installer starts but requires a FIK key (which i can get from our license administrator) but every system in our subnet will have the same problem. Any idea how to solve this ?

Answer 1

[Rishav]

Hi Leo,

For your case, computer or network security software is preventing the MathWorks Installer from connecting to the MathWorks servers. This is known as a connection issue due to proxy settings, antivirus, etc.

Disable the Proxy

The MathWorks installer, activation client and update installer will try to automatically inherit your user proxy settings on Windows and MacOS.

To disable your Proxy in Internet Explorer:

1. Click the Tools button and then select Internet Options.
2. Click the Connections tab and then select LAN settings.
3. Uncheck the check box for Use a proxy server for your LAN.

To disable your Proxy in Chrome:

1. Open the Customize and Control Google Chrome menu by clicking on the three-dots icon at the top right of Google Chrome, select Settings on the right, find Advanced and finally select open proxy settings.
2. Select the LAN Settings button.
3. Deselect the checkbox for Use a proxy server for your LAN.

To disable your Proxy in Safari:

1. Go to Menu and click on Preferences from the drop-down menu.
2. Select the Advanced tab and then click on the Change Settings button.
3. Deselect the checkbox for Use a proxy server for your LAN.

To disable your Proxy in Firefox:

1. Click the Tools button and select Options.
2. Go to the Advanced panel and select the Network tab.
3. Click on Settings in the Connection Section and select No Proxy.

You will need to contact your IT Help Desk to troubleshoot this issue if you do not know your proxy settings or the error persists after entering your proxy settings.

Please refer to the following MATLAB Answer for more information on the possible causes:

https://www.mathworks.com/matlabcentral/answers/92634-why-do-i-get-a-connection-error-when-installing-or-activating-matlab-or-other-mathworks-products