Re: [idvusers] Access to the Unidata and NSF xml catalogs in IDV

• To: "Capehart, William J" <William.Capehart@xxxxxxxxx>
• Subject: Re: [idvusers] Access to the Unidata and NSF xml catalogs in IDV
• From: Don Murray <dmurray@xxxxxxxxxxxxxxxx>
• Date: Thu, 07 Feb 2008 09:37:19 -0700

Hi Bill-

Capehart, William J wrote:

We've noticed that while we can connect to the catalogs for
meteorological data in IDV (e.g., motherloade) from certain locations
(e.g., edu), our experience in connecting with them off campus (e.g.,
from home, meetings, hotel rooms etc) varies.  This is so both with IDV
and using a web brower.  Sometimes it works, sometimes it doesn't and we
can't seem to find a rule by which we can or cannot connect?   I can VPN
to my university system and become an edu, but I'm curious as to the
unpredictability of what locations can connect and what cannot, even
when both are .coms.

Are certain IP ranges (certain ranges of .coms or .nets for example)
walled out from accessing motherloade or similar catalog sites from IDV.

I suspect this is a firewall issue.  The catalogs need
port 8080 and the ADDE access needs port 112.  See:

http://www.unidata.ucar.edu/software/IDV/docs/userguide/Faq.html#firewall


I would guess it all depends on who set up the firewall rules for which
ports to block.  I've had one experience where VPN was blocked by
the firewall.

There is no IP blocking done on our end unless we encounter
someone who abuses our data servers.  That is generally a problem
with FTP access, not IDV use.

Don
*************************************************************
Don Murray                               UCAR Unidata Program
dmurray@xxxxxxxxxxxxxxxx                        P.O. Box 3000
(303) 497-8628                              Boulder, CO 80307
http://www.unidata.ucar.edu/staff/donm
*************************************************************

• References:
  • [idvusers] Access to the Unidata and NSF xml catalogs in IDV
    • From: Capehart, William J