archive.debian.org returning 403 Forbidden

[Andy Smith <andy@strugglers.net>]

Hello,

Some time in the last 24 hours, archive.debian.org started returning
403 Forbidden when used as an APT repository:

    $ sudo apt-get update
    Ign http://archive.debian.org squeeze Release.gpg
    Ign http://archive.debian.org/debian/ squeeze/contrib Translation-en
    Ign http://archive.debian.org/debian/ squeeze/contrib Translation-en_GB
    Ign http://archive.debian.org/debian/ squeeze/main Translation-en
    Ign http://archive.debian.org/debian/ squeeze/main Translation-en_GB
    Ign http://archive.debian.org/debian/ squeeze/non-free Translation-en
    Ign http://archive.debian.org/debian/ squeeze/non-free Translation-en_GB
    Ign http://archive.debian.org squeeze Release
    Ign http://archive.debian.org squeeze/main i386 Packages
    Ign http://archive.debian.org squeeze/contrib i386 Packages
    Ign http://archive.debian.org squeeze/non-free i386 Packages
    Err http://archive.debian.org squeeze/main i386 Packages
      403  Forbidden [IP: 2001:630:206:4000:1a1a:0:c13e:ca1c 80]
    Err http://archive.debian.org squeeze/contrib i386 Packages
      403  Forbidden [IP: 2001:630:206:4000:1a1a:0:c13e:ca1c 80]
    Err http://archive.debian.org squeeze/non-free i386 Packages
      403  Forbidden [IP: 2001:630:206:4000:1a1a:0:c13e:ca1c 80]
    W: Failed to fetch http://archive.debian.org/debian/dists/squeeze/main/binary-i386/Packages.gz  403  Forbidden [IP: 2001:630:206:4000:1a1a:0:c13e:ca1c 80]

    W: Failed to fetch http://archive.debian.org/debian/dists/squeeze/contrib/binary-i386/Packages.gz  403  Forbidden [IP: 2001:630:206:4000:1a1a:0:c13e:ca1c 80]

    W: Failed to fetch http://archive.debian.org/debian/dists/squeeze/non-free/binary-i386/Packages.gz  403  Forbidden [IP: 2001:630:206:4000:1a1a:0:c13e:ca1c 80]

    E: Some index files failed to download, they have been ignored, or old ones used instead.


According to:

    http://archive.debian.org/README

"The following releases are archived on this site:

Archive          Releases              Directory
Debian           buzz, rex, bo, hamm,
                 slink, potato, woody,
                 sarge, etch, lenny,
                 squeeze               debian/"

however, I am seeing this with lenny and squeeze¹.

Is this intentional?

If not, who should the problem be reported to?

Cheers,
Andy

¹ Yes, these ancient machines should be upgraded. The people that own
  them refuse to and I don't have authority to carry out that work
  at this time.