EECS Technical Database

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===== Running MATLAB using SSH tunneling to access EECS license server =====

With SSH tunneling, MATLAB license requests are forwarded from your computer's local ports 1726 and 1727 over a secure Internet connection via indigo to port 1726 and 1727 on our 
license server. 


=== Linux / MacOS X ===

  * Create a new MATLAB license file called localhost.lic in in your home directory. with the following contents.
  * **Note:** With MATLAB R2017A and newer, if your localhost.lic file has **localhost** on the **SERVER** line, it should be replaced with IP number **127.0.0.1**. Failure to make this change will result in a license error. 

<code=text>
SERVER 127.0.0.1 000102030405 1726
USE_SERVER
</code>

  * Use the following shell script **''connect-matlab-license-server.sh''** to establish an SSH tunnel connection to the departmental licence server. Save the file in your home directory. //**Be  sure to replace EECS-USERNAME with your EECS username**//

<code=text>
#!/bin/sh
echo Forwarding local ports 1726:1727 to license server

ssh -2 -N -x -L 1726:licenseserv.eecs.yorku.ca:1726  \
-L 1727:licenseserv.eecs.yorku.ca:1727 EECS-USERNAME@indigo.eecs.yorku.ca
</code>

  * Run the script from the command line to create a SSH tunnel

<code=text>
chmod 755 connect-matlab-license-server.sh
./connect-matlab-license-server.sh
</code>

When you run the script you will be prompt for a password, enter your EECS account password. You are now connected to the EECS license server.


  * Start MATLAB, using our SSH tunnel.

== MacOS X ==
<code=text>
/Applications/MATLAB_R2018a.app/bin/matlab -c ~/localhost.lic 
</code>

== Linux ==
<code=text>
matlab -c ~/localhost.lic 
</code>


=== Windows ===

  * **Create new network license files:**

  * License paths for MATLAB:
<code="text">
C:\Program Files\MATLAB\<release>\licenses\network1.lic 
C:\Program Files\MATLAB\<release>\licenses\network2.lic
</code>

**Note:** You can rename the existing **network.lic** to **network1.lic**

**network1.lic contents:**
  SERVER licenseserv.eecs.yorku.ca 000102030405 1726 
  USE_SERVER 

**network2.lic contents:**
  SERVER 127.0.0.1 000102030405 1726 
  USE_SERVER 


  * Launch a text editor (Not MSWord) and save the following content into a file called **connect-matlab-license-server.cmd** on your desktop. //**Be  sure to replace EECS-USERNAME with your EECS username**//


<code=text>
@echo off
echo Forwarding local ports 1726:1727 to license server
echo Close this Command Prompt window to terminate session!
		
if exist "%ProgramFiles(x86)%\PuTTY\plink.exe" set PLINK="%ProgramFiles(x86)%\PuTTY\plink.exe"
if exist "%ProgramFiles%\PuTTY\plink.exe" set  PLINK="%ProgramFiles%\PuTTY\plink.exe"    
	
		
%PLINK% -2 -N -x -L 1726:licenseserv.eecs.yorku.ca:1726 -L 1727:licenseserv.eecs.yorku.ca:1727 EECS-USERNAME@indigo.eecs.yorku.ca
</code>

  * Use batch script connect-matlab-license-server.cmd you just saved to establish a SSH tunnel connection to the departmental licence server. 
\\
PuTTY can be downloaded from [[http://www.chiark.greenend.org.uk/~sgtatham/putty|http://www.chiark.greenend.org.uk/~sgtatham/putty ]]. 


  * Before you start MATLAB, double click on the connect-matlab-license-server.cmd icon on the desktop. The first time you connect, you will be prompted to save the server key into your local cache. Enter your password when prompted.

  * **Note:** With this setup you will experience a delay when you launch MATLAB if you are not connected to EECS's wired network.