Internal Web sites, does not not via DNS

Error
The requested URL could not be found
Error: The web filter could not find the address of the requested site

Why you see this:
The system is unable to determine the IP address for itserv

Possible reasons could be:

   The site name has been entered incorrectly or does not exist. Please double check you have entered the correct URL.
   The Domain Name Server (DNS) is unable to resolve the IP address for this domain.

And yet, if I opened my internal website of any other browser, it works without problem. The same goes for my internal IIS Web site and also another internal Web site runs its own web server.
Any ideas?

After further investigation by myself yesterday, I solved the problem.
The above server is on a static IP address, which is then defined as an exception in the system proxy settings. Other browsers are able to realize that the DNS name resolves to an IP address within this range.
Despite Firefox these automatically get value, it does not have the DNS name of the server that translates an IP address in the range and so just times out.
As it is definitely a bug with Firefox that needs to be solved, as I said, other browsers are able to resolve the DNS and make adjustments to access the data. Probably I'm not the first to encounter this problem.

Tags: Firefox

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