apt-get update fails after wheezy update

["Steven G. Johnson" <stevenj@alum.mit.edu>]

A few days ago I did an "apt-get update && apt-get dist-upgrade" on our 
amd64 Debian system to update it to wheezy.  Things went mostly okay 
(although it got stuck once on a php update and I had to kill and 
restart apt-get).   However, ever since then apt-get update has failed.

I am not behind a firewall.  The only uncommented line in my 
/etc/apt/sources.list is:

     deb http://ftp.us.debian.org/debian/ stable main contrib non-free

Running "apt-get update" yields the "Connection failed" errors listed 
below.  I've also run "apt-get update -o Debug::Acquire::http=true" to 
get more verbose output, which I've put at 
http://jdj.mit.edu/~stevenj/apt-get-update.out in case it is helpful. 
Running e.g "wget 
http://debian.lcs.mit.edu/debian/dists/stable/main/i18n/Translation-en.bz2"; 
works fine, so it is not a network problem.

Any pointers would be much appreciated.

--SGJ

------------------- "apt-get update" output ------------------
Err http://ftp.us.debian.org stable Release.gpg
  Connection failed
Ign http://ftp.us.debian.org stable Release
Err http://ftp.us.debian.org stable/main amd64 Packages
  Connection failed
Err http://ftp.us.debian.org stable/contrib amd64 Packages
  Connection failed
Err http://ftp.us.debian.org stable/non-free amd64 Packages
  Connection failed
Err http://ftp.us.debian.org stable/contrib Translation-en
  Connection failed
Err http://ftp.us.debian.org stable/main Translation-en
  Connection failed
Err http://ftp.us.debian.org stable/non-free Translation-en
  Connection failed
W: Failed to fetch 
http://ftp.us.debian.org/debian/dists/stable/Release.gpg  Connection failed

W: Failed to fetch 
http://ftp.us.debian.org/debian/dists/stable/main/binary-amd64/Packages 
 Connection failed

W: Failed to fetch 
http://ftp.us.debian.org/debian/dists/stable/contrib/binary-amd64/Packages 
 Connection failed

W: Failed to fetch 
http://ftp.us.debian.org/debian/dists/stable/non-free/binary-amd64/Packages 
 Connection failed

W: Failed to fetch 
http://ftp.us.debian.org/debian/dists/stable/contrib/i18n/Translation-en 
 Connection failed

W: Failed to fetch 
http://ftp.us.debian.org/debian/dists/stable/main/i18n/Translation-en 
Connection failed

W: Failed to fetch 
http://ftp.us.debian.org/debian/dists/stable/non-free/i18n/Translation-en 
Connection failed

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