Did something happen to archive.debian.org in the last 24 hours?

[Andy Smith <andy@strugglers.net>]

Hi mirrors team,

Apologies if this is not the correct team to contact. If it's not,
please do let me know who I should be asking…

In the last 24 hours some customer machines that I support that run
squeeze and lenny¹ (!) started failing to do apt update getting a
"403 Forbidden" error from archive.debian.org.

Taking a look, http://archive.debian.org/ looks pretty empty having
only a /debian-amd64 directory.

Is this intentional? The README file and relevant wiki page still
suggest that archive.debian.org should hold packages all the way
back to bo.

Cheers,
Andy

¹ Yes I am aware that these ancient systems are in dire need of
  being upgraded. Those who own them have not given permission for
  that.