Eclipse: Install Plug Ins

If one can connect to internet, it is easy to install Eclipse Plug Ins.
Go to "Help" --> "Install New Software" --> enter url in "Work With"

But what to do when it is not possible to connect to Internet from Eclipse?

two ways:
(1) find the plug in Zip, download it to local, then use
"Help" --> "Install New Software" --> click on "Add" beside "Work With",
click on "Archive" , select the zip file from your local disk, then Open it.


(2) find the internet proxy which can be used to access internet.
Or use Fiddler (IE browser web debugging tool) to find the proxy Fiddler is using and configure in Eclipse to use it to access the plug in web sites.