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huu2011
October 30th, 2011, 05:25 PM
Hello all,
Good day.
I have installed desktop ubuntu 11.04 on 64 bit.have problem downloading third part software and others.whenever I try I get below error.
I can access internet through my proxy at university but after setting in system setting.

W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/oneiric/main/source/Sources 407 Proxy Authentication Required ( Forefront TMG requires authorization to fulfill the request. Access to the Web Proxy filter is denied. )
, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/oneiric/main/binary-i386/Packages 407 Proxy Authentication Required ( Forefront TMG requires authorization to fulfill the request. Access to the Web Proxy filter is denied. )
, W:Failed to fetch http://archive.canonical.com/ubuntu/dists/oneiric/partner/source/Sources 407 Proxy Authentication Required ( Forefront TMG requires authorization to fulfill the request. Access to the Web Proxy filter is denied. )
, W:Failed to fetch http://archive.canonical.com/ubuntu/dists/oneiric/partner/binary-i386/Packages 407 Proxy Authentication Required ( Forefront TMG requires authorization to fulfill the request. Access to the Web Proxy filter is denied. )
, W:Failed to fetch http://archive.canonical.com/ubuntu/dists/maverick/partner/source/Sources 407 Proxy Authentication Required ( Forefront TMG requires authorization to fulfill the request. Access to the Web Proxy filter is denied. )
, E:Some index files failed to download. They have been ignored, or old ones used instead.

Thank you for your help
huu

Paddy Landau
October 30th, 2011, 07:14 PM
When you say "downloading", are you referring to using the software manager to download and install?

I see that you are using Natty 11.04, but the lines you have given us show either Oneiric (11.10) or Maverick (10.10). They should all show Natty.

If I have understood you correctly, then open Ubuntu Software Centre > Edit > Software Sources > Other Software. Look down the list and search for anything that says oneiric or maverick. Edit those lines and change to natty.