It’s not easy to work using open source operating system like Ubuntu Linux. Here is the example :

This morning I tried to open Fujitsu mail server from my home, browsing it using SeaMonkey web browser installed on my Ubuntu desktop. It was rejected by the SSL gateway. Theoretically I must used Windows to get access to Fujitsu mail server. It’s because SSL gateway will installed some application like host checker to check whether my computer using Windows OS, using correct anti virus software that comply with company policies. SSL gateway also check whether my Windows already joined into Fujitsu domain or not. So when I use Linux, I can’t access Fujitsu SSL gateway. I don’t understand security things a lot, but what I know is that the policy isn’t friendly with open source user.