tools - Eclipse set proxy connection

sometimes when you try to upgrade software and thanks to the GFW (Great Firewall) the simple questoin becomes impossible. 

however, you can setup the propxy connection. 

Howh to configure Proxy Settings in Eclipse

1) In Eclipse IDE, select “Window –> Preferences”

2) Preferences box prompt out, choose “Network Connections”.

3) Select “Manual” from Action Provider drop down list

4) Select Http in the List and click “Edit” button

5) Fill in the proxy server host and port number, (fill in the username and password if any)

6) Ok, Done.

Now, Eclipse is able to connect to Internet and pass through Proxy server.

Reference:

How To Configure Proxy Settings In Eclipse