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dorismail               20-Dec-2019 00:51:00 Message No 1206
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Author: "Michael, Benjamin P. (GSFC-61A0)" <benjamin.p.michael@nasa.gov>
Subject: TERMINATION of Anonymous ftp at CDDIS

Dear CDDIS Users
 
PLEASE READ THE ENTIRE EMAIL!
 
For more than two years now CDDIS has been warning our user community about the eventual 
termination of anonymous ftp to the CDDIS archive.  On 31 October 2020, anonymous ftp access 
will officially be discontinued at CDDIS.  CDDIS will bandwidth limit ALL anonymous ftp service 
starting the summer of 2020.  CDDIS will implement bandwidth limits and final discontinuation 
of anonymous ftp service in the timeline below.
 
1.	1 July 2020 – all anonymous ftp service will be bandwidth limited to 1MB/s
2.	10 August 2020 – all anonymous ftp service will be bandwidth limited to 250KB/s
3.	1 October 2020 – all anonymous  ftp service will be bandwidth limited to 50KB/s
4.	31 Oct 2020 – all anonymous ftp service will be permanently discontinued at CDDIS
 
CDDIS is STRONGLY recommending all users begin to transition to use https (https://cddis.nasa.gov/archive) 
as the preferred method of access to the CDDIS archive.  
Download procedures can be found at:   https://cddis.nasa.gov/About/CDDIS_File_Download_Documentation.html, 
along with a Frequently Asked Questions (FAQ) link and links of how to use cURL, wget and Python 
(https://cddis.nasa.gov/Data_and_Derived_Products/CDDIS_Archive_Access.html)
 
CDDIS has also made available ftp-ssl (gdc.cddis.eosdis.nasa.gov) as a secondary method to access the archive.  
In some cases the use of ftp-ssl may make the conversion of existing scripts easier than using https.  
Examples of how to use ftp-ssl are listed at:   https://cddis.nasa.gov/Data_and_Derived_Products/CDDIS_Archive_Access.html.
 
CDDIS will NOT be changing the archive structure.  So the locations that you are using to access files 
will stay the same.  Though a prefix in the URL might be needed, (i.e. /archive for the https method) or a new host (for ftp-ssl).
 
CDDIS currently supports approximately 300,000 users and has served out almost 2 billion files in 2019.  
We understand that this change can have a significant impact on some of our users and have tried to make 
this process as easy as possible.  Unfortunately this change is mandated by the US Government and outside 
of CDDIS’s control.  If there are questions or comments, we ask that you address them to 
support-cddis@earthdata.nasa.gov  and not directly to any CDDIS staff member.
 
So in summary:
 
1.	Anonymous ftp service will be discontinued 31 October 2020.
2.	Transition to https or ftp-ssl needs to begin NOW
3.	Questions should be addressed to support-cddis@earthdata.nasa.gov
 
R
Pat
 
Patrick Michael
Deputy Manager
Crustal Dynamics Data Information System (CDDIS)
NASA-Goddard Space Flight Center
Greenbelt, MD 20771
301-614-5370
Patrick.Michael@nasa.gov