RSS Viewer SharePoint 2010

Hi Friends,
When we configured RSS Viewer Web Part, It throws an error:
The requested RSS feed could not be displayed. Please verify the settings and url for this feed. If this problem persists, please contact your administrator.

We use NTLM Authentication.
We are trying to put an external link in the sharepoint rss viewer web part.
link: http://rss.cnn.com/rss/cnn_topstories.rss

Went through a few articles asking for a proxy server settings to add in web.config.
we are not in keen interest if we have some option.

Please advise the way forward.
LVL 10
Minesh ShahSharePoint & all about itAsked:
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Justin SmithSr. System EngineerCommented:
Do your web front ends have internet acccess?  Can you access the URL from your client and from the web front ends?
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Minesh ShahSharePoint & all about itAuthor Commented:
I can access the url from my base machine.
On any SharePoint Server, i can't access the url since no internet connection is there on any sharepoint server.
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Justin SmithSr. System EngineerCommented:
Ok.  I don't THINK your web server has to have internet access, but something to investigate (which it seems you already are).  I dropped an RSS Viewer on my test site and was able to access the CNN url without issue.
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Minesh ShahSharePoint & all about itAuthor Commented:
no luck yet.
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Minesh ShahSharePoint & all about itAuthor Commented:
seems not possible unless we have internet connction on wfe.
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Minesh ShahSharePoint & all about itAuthor Commented:
ok
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