My IP be blocked

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liugers11
Posts: 18
Joined: Fri Mar 01, 2013 2:08 pm America/New_York

My IP be blocked

by liugers11 » Sat Oct 28, 2017 9:56 am America/New_York

Hi
    
     We cannot download data from oceancolor this month.  It
seems my ip (xx.xxx.xx.xx) is blocked by the server. In the
accessory, it is the "tracert". We want to download long time series
MODIS image to analysis the change of some China lakes. Thank you very
much.
    I have try to send an email to connection_problems@oceancolor.sci.gsfc.nasa.gov. It failed.
   Best Wishes
   Ge

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gnwiii
Posts: 642
Joined: Fri Jan 29, 2021 5:51 pm America/New_York
Answers: 2

My IP be blocked

by gnwiii » Sat Oct 28, 2017 1:28 pm America/New_York

When you encounter connection problems it is good practice to provide lots of detail: which file failed (with date and time) , the program and version used, and your OS version.  Some of us have been caught out by buggy vendor updates (fedora 25 python ssl worked, but fails on fedora 26), so you may need to check your software.  The openssl cookbook shows how to use openssl to check that your openssl library is working with the NASA servers.   Your client software should have options to report more details of the connection progress.

You should use tcptraceroute and port 443 for https servers:

$ tcptraceroute oceancolor.gsfc.nasa.gov 443
Selected device wlan0, address xx.xxx.xx.xx, port 49111 for outgoing packets
Tracing the path to oceancolor.gsfc.nasa.gov (xx.xxx.xx.xx) on TCP port 443 (https), 30 hops max
1  xx.xxx.xx.xx  2.936 ms  0.762 ms  1.037 ms
2  * * *
[...]
18  oceancolor.sci.gsfc.nasa.gov (xx.xxx.xx.xx) [open]  44.798 ms  43.923 ms  42.484 ms

and
$ tcptraceroute oceandata.sci.gsfc.nasa.gov 443led,
Selected device wlan0, address xx.xxx.xx.xx, port 46626 for outgoing packets
Tracing the path to oceandata.sci.gsfc.nasa.gov (xx.xxx.xx.xx) on TCP port 443 (https), 30 hops max
1  xx.xxx.xx.xx  2.895 ms  0.713 ms  0.737 ms
2  * * *
[...]
18  gs6142obpg1020.sci.gsfc.nasa.gov (xx.xxx.xx.xx) [open]  154.427 ms  154.978 ms  129.799 ms

liugers11
Posts: 18
Joined: Fri Mar 01, 2013 2:08 pm America/New_York

My IP be blocked

by liugers11 » Sun Oct 29, 2017 2:47 am America/New_York

Hi, gnwiii

      I think it is blocked by the website beacuse I cannot download the data using windows 10.  If I use the VPN, I can download the data and process the images.


Thank you very much.

Best Wishes

Ge

pfsmith
Posts: 16
Joined: Wed Dec 29, 2004 2:11 pm America/New_York

My IP be blocked

by pfsmith » Mon Nov 13, 2017 11:28 am America/New_York

Ge,

Thanks for letting us know about your problem. We have checked through the system and made some adjustments. Please try again at your convenience.

Paul

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