407 Proxy Authentication Required

Question

When I try to install a software using Ubuntu Software center I get:

Failed to download repository information
Check Your Internet connection

When I try to do a apt-get install something, I get:

407  Proxy Authentication Required

I use a proxy server that requires a user-name and a password. I have set my systems proxy manually, by plugging in the required numbers in the Networks proxy and applied it system wide. I guess the problem now is plugging in my user-name and password.

When I use INTERNET via Mozilla, it specifically asks me for my user-name and password.

Answer 1

For your apt-get to work, you should edit your apt config file:

sudo gedit /etc/apt/apt.conf

And add Acquire::http::Proxy "http://username:password@proxyhost:port/";

The syntax shown above should be strictly followed.

This configuration may fail if your username or password has an '@' in it. You can also add proxy configuration for other protocols such as FTP.

Answer 2

I think this tutorial should help you.

Click on Network tab select Manual Proxy Configuration option and enter your proxy server,port details.If you have username,password click on Authentication to enter these details click on ok

(from http://www.ubuntugeek.com/how-to-configure-ubuntu-desktop-to-use-your-proxy-server.html)

To invoke it for all programs launched in a shell I would suggest you either add it to your /etc/bash.bashrc using gksudo gedit /etc/bash.bashrc to apply it system-wide for all bash sessions or to your user-space ~/.bashrc.

As far as Synaptic goes, in the Preferences under the Network tab you seem to be able to set authentification for your proxies. This appears to be specific to Synaptic, though.

Answer 3

If your user name is separated by space then use:

export http_proxy='http://Pankaj Kumar Pandit:ABCD@192.168.1.1:3128/'

If your user name not separated by space the use:

export http_proxy=http://Pankaj Kumar Pandit:ABCD@192.168.1.1:3128/

The difference is ' '.

Answer 4

I was also facing the same problem. Then i came to know about CNTLM . Now it works really well . See how to configure CNTLM here.

Answer 5

One nice alternative is to use Synaptic Package Manager, where you can specify system independent proxy settings and also store username and password.

However, this won't change proxy for Software Center.