I do have the user name and password for loging into the company's VPN. The bit I should have mentioned is that on a Windows machine, the citrix client gets activated when I do a login via firefox. The citrix client then changes the network on my computer and all my network traffic gets routed through my company's server. At this point I can fire up the remote desktop software and enter the user name and password for my PC and login.
On Ubuntu the citrix client does not change the network settings on my PC. All traffic is still routed through my home network. I believe I need to setup the VPN connection manually in Ubuntu and then be able to remote desktop into my work PC.
What I have is a https address of my company's VPN server, a user name and password.
Hope I have made things a bit more clearer.
Thanks for reponding