[thelist] Configuring a IIS behind a router

Norman Beresford n.beresford at anansi.co.uk
Sat May 18 10:39:01 CDT 2002

Hi David

Your problem is being caused by your router.  The IP addresses the router is
assigning you are in what is called a private range of IP addresses.  These
are IP addresses which are only ever used on private networks.  When a
packet of information comes into your router it looks to see which private
IP address to forward it on to.  This process is known as Network Address
Translation.  The problem you've got is that when a request comes into your
router IP address it's stopping dead there.  What you need to do is tell
your router to forward all web server requests to your Win2k server.

The type of service that is being requested is identified by the port number
that it's requesting.  So say your router external IP address is, when a request for a webpage comes into it it's actually going
to  So what you need to do is tell the router to forward
all requests on port80 to, this process is known as port
forwarding.  If you look in your router manual you should be able to find
out whether it can handle it or not.

Something to be very very aware of, IIS servers are very insecure out of the
box.  If you're going to make your publically available you should be aware
of the risks involved, and the tools that are available to help you minimise
them (check the Microsoft site for their lockdown tool and security updates)



-----Original Message-----
From: thelist-admin at lists.evolt.org
[mailto:thelist-admin at lists.evolt.org]On Behalf Of David Bindel
Sent: 18 May 2002 16:00
To: thelist at lists.evolt.org
Subject: [thelist] Configuring a IIS behind a router

Hi all,

My name is David Bindel and I am a 15 year old web developer (working with
XML, CSS, ASP, and learning PHP and Perl).  I am running Windows 2000 Server
and I'm trying to set IIS up so I can test websites I make from other

Let me explain my situation:

* We have Road Runner Cable Internet
* My younger brother lives in the same room with his computer also
* Because of that, we have to use a router to split the cable connection to
use it on both of our computers
* The router assigns us "fake" (example: 192.168.1.xxx) IP addresses to
separate the computers i guess

Now, our Internet access works perfectly fine, but when it comes to setting
up IIS as a server, I'm not really sure what to do.  My problem (I think) is
that the router is assigning me its "fake" generic IP address and because of
that, people outside of the network my brother and I have set up will not be
able to get to the server... it stops at the router I guess.

Here are the symptoms:

* I CAN access the website by typing in the fake IP address the router
assigns me
* I CAN access the website by going to http://localhost/
* I CAN'T access the website by going to my real Road Runner IP address

Has anyone run into this problem before, and do you know how I can correct
this so I can serve websites?

Thanks in advance,
David Bindel (dbindel at austin.rr.com)

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