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I have problem when I try apt-get update i get error:

407 Proxy Authentication Required ( Forefront TMG requires authorization to fulfill the request. Access to the Web Proxy filter is denied. )

How ever I can use internet from Mozilla, when I set proxy parameters. Any ideas how to fix this?

/etc/apt/apt.conf file all good.

Macb3th
  • 31

2 Answers2

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Does your proxy require authentication? If yes, then your apt.conf file should look like this

Acquire::http::Proxy "http://username:password@server:port";
Acquire::https::Proxy "https://username:password@server:port";
Acquire::ftp::Proxy "ftp://username:password@server:port";
Acquire::socks::Proxy "socks://username:password@server:port";

Note : Mozilla Firefox works fine because it accesses the proxy from network setting and asks authentication when you open firefox.

Mahesh Kumar
  • 21
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I use Ubuntu desktops in a corporate environment. My Firefox and apt.conf proxies are the same. My 'procedure' is to open Firefox which then prompts me for my user ID and password to authenticate the proxy when I navigate to an external website. I can then apt-get update etc. with no errors. If I don't authenticate using Firefox first, I get 407 errors.

Richard Clinker
  • 156
  • I tried, but its not working. '407 Proxy Authentication Required ( Forefront TMG requires authorization to fulfill the request. Access to the Web Proxy filter is denied. ) ' – Macb3th Feb 22 '16 at 09:38