How to config proxy in Ubuntu on VirtualBox

Question

All:

I am new to virtualbox. I install virtualbox on a WIndow7x64 box(IP: 45.37.2.38, Mask: 255.255.255.0 Gateway:45.37.2.1) which is behind office's proxy, inside virtualbox, I install Ubuntu 14.04 server. During the installation, I set proxy credential, and use other default setting except using bridge mode connection in virtualbox(IP: 45.37.2.42, Mask: 255.255.255.0).

Right now, I run apache inside ubuntu and I can visit from windows. And in ubuntu, I can use sudo apt-get update, but can NOT ping www.google.com(which says Destination Host Unreachable.)

My route table is like:

default     45.37.2.1  0.0.0.0         UG
45.37.2.0   *          255.255.255.0   U

My questions are:

1. Should I set proxy in somewhere? (I already set it once during installation)

2. Is this route wrong to send request out? Why I can not ping www.google.com?

Solution

First of all check whether you are able to ping your proxy server using Ubuntu in your virtual box. the command for this is :

ping <address_of_the_proxy_server>

If you are able to ping the proxy-server, now you can check whether your credentials are correctly set or not.Open the terminal and run env.

A lot of information will appear on the screen. Check for http_proxy and https_proxy. If they are not correctly set you can set them using a Graphical tool named ubproxy .You can download a python it to set proxy authentication. Here is the link to it.

Or else you can set proxy authentication using the following steps:

Go to /etc/apt. Create the file apt.conf if you don't have it there. Write the following lines there.

Acquire::http::proxy "http://username:password@proxyserver:port/";
Acquire::https::proxy "https://username:password@proxyserver:port/";
Acquire::socks::proxy "socks://username:password@proxyserver:port/";

Save it. You are done. If the problem persists please comment.

Comments

[mpontillo]

You cannot directly ping through an HTTP proxy. You could try using curl to check if you can access anything via the proxy; see the answers here.

[Kuan]

THanks, I tested it, it can not ping the proxy server.

[Snake Eyes]

Which mode are you using NAT or bridged?

[Kuan]

Bridged like I mentioned

[Snake Eyes]

have u checked env command that i have mentioned?

[avitevet]

This fixed my problem when I installed Ubuntu 14.04 in VirtualBox with NAT behind an office firewall. Before creating this file, apt-get could not connect. After creating this file with the correct data, apt-get was able to download.