Can't access oceandata.sci.gsfc.nasa.gov

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landgate_satsys
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Joined: Mon Mar 22, 2021 4:24 am America/New_York

Can't access oceandata.sci.gsfc.nasa.gov

by landgate_satsys » Mon Mar 22, 2021 4:33 am America/New_York

I've been accessing ancillary data from the oceandata.sci.gsfc.nasa.gov routinely. Since Thursday 18/3 I've been unable to access ancillary data. I am also unable to download level0 MODIS Aqua and Terra PDS files using a subscription.

As an example I used the following command to access ancillary data:

/usr/bin/wget --load-cookies ~/.urs_cookies --save-cookies ~/.urs_cookies --auth-no-challenge=on --content-disposition https://oceandata.sci.gsfc.nasa.gov/cgi ... 0.0400.003 -v -d

Output:
URI encoding = âUTF-8â
Converted file name 'PM1ATTNR.P2021070.0400.003' (UTF-8) -> 'PM1ATTNR.P2021070.0400.003' (UTF-8)
--2021-03-22 08:27:43-- https://oceandata.sci.gsfc.nasa.gov/cgi ... 0.0400.003
Resolving oceandata.sci.gsfc.nasa.gov (oceandata.sci.gsfc.nasa.gov)... 169.154.128.84, 2001:4d0:2418:128::84
Caching oceandata.sci.gsfc.nasa.gov => 169.154.128.84 2001:4d0:2418:128::84
Connecting to oceandata.sci.gsfc.nasa.gov (oceandata.sci.gsfc.nasa.gov)|169.154.128.84|:443... connected.
Created socket 3.
Releasing 0x0000000001cbdf50 (new refcount 1).
Initiating SSL handshake.
SSL handshake timed out.
Closed fd 3
Unable to establish SSL connection.
Saving cookies to /home/centos/.urs_cookies.
Done saving cookies.

Any suggestions would be greatly appreciated.

Jackie

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OB.DAAC - amscott
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Re: Can't access oceandata.sci.gsfc.nasa.gov

by OB.DAAC - amscott » Tue Mar 23, 2021 12:29 pm America/New_York

Hi Jackie,

Did you follow the steps to create a .netrc file before running your command?

When I tried your command before creating the .netrc file, I get a similar error to the one you described. Once I set up my .netrc file correctly, then ran the command, the ancillary data downloaded.

Here is the link with instructions: https://oceancolor.gsfc.nasa.gov/data/d ... wnload_sec

Alicia
--
Alicia

landgate_satsys
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Re: Can't access oceandata.sci.gsfc.nasa.gov

by landgate_satsys » Tue Mar 23, 2021 9:53 pm America/New_York

Thank you for your reply Alicia. I followed the steps to create a .netrc file and have been downloading data for several months using this method. Our colleagues at another organisation are experiencing the same issue with the SSL handshake.

landgate_satsys
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Joined: Mon Mar 22, 2021 4:24 am America/New_York

Re: Can't access oceandata.sci.gsfc.nasa.gov

by landgate_satsys » Thu Jul 15, 2021 12:13 am America/New_York

Hi Alicia,

Over the last 4 months we have continued to have the same problem and no matter what server (and IP address) we use within the AWS Asia Pacific (Sydney) region they all get blocked. When we have done tests from our own on premise servers we have no problem and we have had success from the AWS US East (N. Virginia) us-east-1 and Asia Pacific (Tokyo) ap-northeast-1 regions. So it just seems that there is a blacklist applied to any IP addreses originating from within the AWS Asia Pacific (Sydney) ap-southeast-2 region. If I could provide the 2 IP addresses that belong to the servers we use to do the downloads would it be possible to check whether they are on your blacklist and remove them?

Regards,
Mike

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Re: Can't access oceandata.sci.gsfc.nasa.gov

by OB.DAAC - SeanBailey » Thu Jul 15, 2021 10:40 am America/New_York

Mike,
Please send an email to connection_problems@oceancolor.sci.gsfc.nasa.gov with as much information as possible to describe your connection issues. Some things that might be helpful:
  • The date and time you last attempted to access the site
  • Output from a traceroute command (on Windows use tracert)
    Examples:
    traceroute oceancolor.gsfc.nasa.gov
    or
    traceroute oceandata.sci.gsfc.nasa.gov
Sean

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