apt-get update not working ?

[Markus Schönhaber]

Michał Sznajder wrote:
> Right now ddrescue is copying data from my old drive to the new one
> and I am having fun with Dapper Drake. Almost. I tried to make apt-get
> update but I got following :
>
> michal at michal-laptop:/usr/share/applications$ sudo apt-get update
> Err http://www.kadu.net dapper Release.gpg
>   Connection failed
> Err http://security.ubuntu.com dapper-security Release.gpg
>   Connection failed
> Ign http://security.ubuntu.com dapper-security Release
> Ign http://security.ubuntu.com dapper-security/main Packages
> Err http://archive.ubuntu.com dapper Release.gpg
>   Connection failed [IP: 195.248.90.23 80]
[...]
> [.....SKIP LOTS OF LINES...]
> Reading package lists... Done
> E: Some index files failed to download, they have been ignored, or old
> ones used instead.
>
> But I could open most of mentioned files in Firefox. Ping also works.
> What could be wrong?

Are you forced to use a proxy for accessing web sites and have you configured 
Firefox to actually use it but not apt?

Regards
  mks