root@debian:~# wget --no-check-certificate https://www.atmark-techno.com/
--1970-01-01 00:16:22--  https://www.atmark-techno.com/
Resolving www.atmark-techno.com (www.atmark-techno.com)... 121.101.71.135
Connecting to www.atmark-techno.com (www.atmark-techno.com)|121.101.71.135|:443... connected.
WARNING: The certificate of `www.atmark-techno.com' is not trusted.
WARNING: The certificate of `www.atmark-techno.com' hasn't got a known issuer.
The certificate has not yet been activated
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: `index.html'

    [ <=>                                   ] 26,796      --.-K/s   in 0.03s   

1970-01-01 00:16:24 (757 KB/s) - `index.html' saved [26796]


root@debian:~# apt-get update
Ign http://download.atmark-techno.com wheezy InRelease
Hit http://security.debian.org wheezy/updates InRelease
Ign http://ftp.jp.debian.org wheezy InRelease  
Get:1 http://download.atmark-techno.com wheezy Release.gpg [833 B]
Hit http://ftp.jp.debian.org wheezy Release.gpg
Hit http://download.atmark-techno.com wheezy Release
Hit http://ftp.jp.debian.org wheezy Release                           
Ign http://download.atmark-techno.com wheezy Release                  
Hit http://security.debian.org wheezy/updates/main Sources           
Ign http://download.atmark-techno.com wheezy/main Sources/DiffIndex  
Ign http://download.atmark-techno.com wheezy/contrib Sources/DiffIndex
Hit http://security.debian.org wheezy/updates/main Translation-en    
Ign http://download.atmark-techno.com wheezy/main armhf Packages/DiffIndex
Hit http://ftp.jp.debian.org wheezy/main Sources                     
Ign http://download.atmark-techno.com wheezy/contrib armhf Packages/DiffIndex
Hit http://ftp.jp.debian.org wheezy/main armhf Packages              
Hit http://ftp.jp.debian.org wheezy/main Translation-en              
Get:2 http://security.debian.org wheezy/updates/main armhf Packages [724 kB]
Hit http://download.atmark-techno.com wheezy/main Sources 
Hit http://download.atmark-techno.com wheezy/contrib Sources
Err http://download.atmark-techno.com wheezy/nonfree Sources
  404  Not Found
Hit http://download.atmark-techno.com wheezy/main armhf Packages
Hit http://download.atmark-techno.com wheezy/contrib armhf Packages
Err http://download.atmark-techno.com wheezy/nonfree armhf Packages
  404  Not Found
Ign http://download.atmark-techno.com wheezy/contrib Translation-en
Ign http://download.atmark-techno.com wheezy/main Translation-en
Ign http://download.atmark-techno.com wheezy/nonfree Translation-en
Fetched 834 B in 1s (606 B/s)
W: There is no public key available for the following key IDs:
9D6D8F6BC857C906
W: GPG error: http://download.atmark-techno.com wheezy Release: The following signatures couldn't be ve
rified because the public key is not available: NO_PUBKEY 3874DA771B351757
W: There is no public key available for the following key IDs:
7638D0442B90D010
W: Failed to fetch gzip:/var/lib/apt/lists/partial/security.debian.org_dists_wheezy_updates_main_binary
-armhf_Packages  Hash Sum mismatch

W: Failed to fetch http://download.atmark-techno.com/debian/dists/wheezy/nonfree/source/Sources  404  N
ot Found

W: Failed to fetch http://download.atmark-techno.com/debian/dists/wheezy/nonfree/binary-armhf/Packages 
 404  Not Found

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