I'm working in a private company which has several internal web portals or applications hosted on LAN. So whenever i type "fp/" in the address bar of any browser , it is automatically redirects me to a portal page which is "http://apps/FPMS/aspx/FPMSHome.aspx". Are they using DNS to match the URL for redirecting.? If yes , how can i find other shortcuts like this one.? If no , what is happening behind the screen ? please clarify this :)

  • You could use tools like HttpFox to check what's happening. Alternatively, a debugging proxy like Fiddler would also yield that information.
    – Daniel B
    Feb 22, 2014 at 12:58
  • thanks @DanielB . i tried with HttpFox. When i enter fp/ , the logs shows as redirecting to the link. but i'm eager to know how its getting redirected.
    – RamValli
    Feb 22, 2014 at 13:13
  • If these are Windows machines, WINS may be what is used to resolve to IP address. I see it all the time in well-established organizations especially with file shares. But the answer below explains how the redirect is happening.
    – milli
    Mar 8, 2014 at 20:18

1 Answer 1


DNS can't match URLs. It only provides an IP address for a hostname (fp, in this case). After acquiring the IP address to connect to, the browser sends its request. This request contains the original hostname – you can see this in the request headers in HttpFox.

For the redirection to work, there has to be a HTTP server listening at the IP address the hostname resolved to. This server is configured to respond to requests containing hostname fp with a redirect to http://apps/FPMS/aspx/FPMSHome.aspx.

In Apache HTTPd, this would be accomplished like this:

  ServerName fp
  RedirectPermanent / http://apps/FPMS/aspx/FPMSHome.aspx

Similar configurations are possible in virtually every HTTP server. Your company most likely uses Microsoft Internet Information Services (IIS).

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