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While on an intranet, how can I distinguish whether a website is available publicly or not?

I gave a link to someone and then realized that he could not access it because it was on the intranet. Is there some way to know?

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closed as off topic by ChrisF, heavyd, Gnoupi Aug 10 '10 at 9:53

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up vote 6 down vote accepted

a site similar to should do the job.

If you mean a way to find if anouther intranet user can see a internet site, then it depends on firewall settings and similar. Thats a much bigger topic.

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I usually use a proxy server such as to test the accessibility of an internally hosted site.

That will access the url on the intranet from a site outside. If you can browse to it through that, then so can others.

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