Proxmox repo failed to update

the download servers are up and running, try again.
 
Again the sites forum.proxmox.com, download.proxmox.com and pve.proxmox.com were offline again (tried from 7 servers at several providers).
 
yes, just a short maintenance of the server (20 min), nothing unusual.
 
I am also not able to update since I´ve installed (from a CD) the 2.1 version.
I get the following errors, but it is interesting that I can ping those servers ok.

root@vmserver:~# ping ftp.br.debian.org
PING debian.c3sl.ufpr.br (200.236.31.3) 56(84) bytes of data.
64 bytes from debian.c3sl.ufpr.br (200.236.31.3): icmp_req=1 ttl=55 time=43.8 ms
64 bytes from debian.c3sl.ufpr.br (200.236.31.3): icmp_req=2 ttl=55 time=91.9 ms
64 bytes from debian.c3sl.ufpr.br (200.236.31.3): icmp_req=3 ttl=55 time=99.4 ms
root@vmserver:~# aptitude update
Err http://ftp.br.debian.org squeeze Release.gpg
Could not resolve 'ftp.br.debian.org'
Err http://ftp.br.debian.org/debian/ squeeze/contrib Translation-en
Could not resolve 'ftp.br.debian.org'
Err http://ftp.br.debian.org/debian/ squeeze/contrib Translation-en_US
Could not resolve 'ftp.br.debian.org'
Err http://ftp.br.debian.org/debian/ squeeze/main Translation-en
Could not resolve 'ftp.br.debian.org'
Err http://ftp.br.debian.org/debian/ squeeze/main Translation-en_US
Could not resolve 'ftp.br.debian.org'
Err http://download.proxmox.com squeeze Release.gpg
Could not resolve 'download.proxmox.com'
Err http://download.proxmox.com/debian/ squeeze/pve Translation-en
Could not resolve 'download.proxmox.com'
Err http://download.proxmox.com/debian/ squeeze/pve Translation-en_US
Could not resolve 'download.proxmox.com'
Err http://security.debian.org squeeze/updates Release.gpg
Could not resolve 'security.debian.org'
Err http://security.debian.org/ squeeze/updates/contrib Translation-en
Could not resolve 'security.debian.org'
Err http://security.debian.org/ squeeze/updates/contrib Translation-en_US
Could not resolve 'security.debian.org'
Err http://security.debian.org/ squeeze/updates/main Translation-en
Could not resolve 'security.debian.org'
Err http://security.debian.org/ squeeze/updates/main Translation-en_US
Could not resolve 'security.debian.org'


Thanks for any help.

Jose
 
download.proxmox.com is up and running, seems to be a network issue on your location. try later.
 
download.proxmox.com is up and running, seems to be a network issue on your location. try later.

Yes I can ping it from my Proxmox VE server.
However when I try the update command, I receive those errors.
I was running version 1.9 before without this problem. After I finished installing 2.1 the first thing I did was the update command and this happened (and is still happening). I just can´t use the update nor the upgrade command.
It looks like a configuration issue.

Jose
 
post your sources.list.

Code:
cat /etc/apt/sources.list
 
looks ok.