The DevTest services will installed on Linux, but due to firewall restrictions I will need to be able to start up the Workstation and Portal on this server
Is it possible to run DevTest Workstation on Linux?

All supported DevTest releases.

You can run DevTest Workstation on a Linux server. 
You need to verify if there is graphical front end available on your server, so you can load the Workstation in the server. 
Here is the documentation to install the Workstation in a Linux server: 
https://docops.ca.com/devtest-solutions/10-1/en/installing/installing-devtest-workstation#InstallingDevTestWorkstation-InstallDevTestWorkstationonUNIX 

You can also have Putty and Xming configured on your Windows machine to load the Workstation using Putty. 
The links below contain the steps to configure Putty and Xming. The second link contains an example as well: 
http://www.geo.mtu.edu/geoschem/docs/putty_install.html 
http://laptops.eng.uci.edu/software-installation/using-linux/how-to-configure-xming-putty