Problemi con repository ubuntu

[Shaytan (POL)]

Quando cerco di fare l'update con apt-get update pare che non riesca a connettersi mentre al contrario navigo tranquillamente, posto qui sotto ildettaglio:

antonio@shaytan:~$ sudo apt-get update
Err http://security.ubuntu.com dapper-security Release.gpg
Impossibile connettersi a security.ubuntu.com:80 (1.0.0.0), tempo limite di connessione esaurito
Err http://it.archive.ubuntu.com dapper Release.gpg
Impossibile connettersi a it.archive.ubuntu.com:80 (1.0.0.0), tempo limite di connessione esaurito
Err http://it.archive.ubuntu.com dapper-updates Release.gpg
Impossibile connettersi a it.archive.ubuntu.com:80 (1.0.0.0), tempo limite di connessione esaurito
Err http://it.archive.ubuntu.com dapper-backports Release.gpg
Impossibile connettersi a it.archive.ubuntu.com:80 (1.0.0.0), tempo limite di connessione esaurito
Impossibile ottenere http://it.archive.ubuntu.com/ubuntu/...er/Release.gpg Impossibile connettersi a it.archive.ubuntu.com:80 (1.0.0.0), tempo limite di connessione esaurito
Impossibile ottenere http://it.archive.ubuntu.com/ubuntu/...es/Release.gpg Impossibile connettersi a it.archive.ubuntu.com:80 (1.0.0.0), tempo limite di connessione esaurito
Impossibile ottenere http://it.archive.ubuntu.com/ubuntu/...ts/Release.gpg Impossibile connettersi a it.archive.ubuntu.com:80 (1.0.0.0), tempo limite di connessione esaurito
Impossibile ottenere http://security.ubuntu.com/ubuntu/di...ty/Release.gpg Impossibile connettersi a security.ubuntu.com:80 (1.0.0.0), tempo limite di connessione esaurito
Lettura della lista dei pacchetti in corso... Fatto
W: Impossibile scaricare alcune file di indice, essi verranno ignorati, oppure si useranno quelli precedenti.


Mia source.list:

# Line commented out by installer because it failed to verify:
deb http://it.archive.ubuntu.com/ubuntu/ dapper main restricted
# Line commented out by installer because it failed to verify:
#deb-src http://it.archive.ubuntu.com/ubuntu/ dapper main restricted

## Major bug fix updates produced after the final release of the
## distribution.
# Line commented out by installer because it failed to verify:
deb http://it.archive.ubuntu.com/ubuntu/ dapper-updates main restricted
# Line commented out by installer because it failed to verify:
#deb-src http://it.archive.ubuntu.com/ubuntu/ dapper-updates main restricted

## Uncomment the following two lines to add software from the 'universe'
## repository.
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
# # your rights to use the software. Also, please note that software in
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
deb http://it.archive.ubuntu.com/ubuntu/ dapper universe
# deb-src http://it.archive.ubuntu.com/ubuntu/ dapper universe

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://it.archive.ubuntu.com/ubuntu/ dapper-backports main restricted univ$
# deb-src http://it.archive.ubuntu.com/ubuntu/ dapper-backports main restricted$

# Line commented out by installer because it failed to verify:
deb http://security.ubuntu.com/ubuntu dapper-security main
# Line commented out by installer because it failed to verify:
#deb-src http://security.ubuntu.com/ubuntu dapper-security main
# deb http://security.ubuntu.com/ubuntu dapper-security universe
# deb-src http://security.ubuntu.com/ubuntu dapper-security universe

[Shaytan (POL)]

Risolto a manina. Tanto per l cronaca c'era il dns in /etc/resolv.conf sballato conl'indirizzo del router ed ho messo quello del mio provider