[thelist] Configuring a IIS behind a router

Gijs van Tulder gvtulder at members.evolt.org
Sat May 18 13:31:12 CDT 2002

Hi David,

Those 'fake IP's' you talk about, are part of the so-called 'private address
space'. You can read more about them here:

Those reserved addresses are not available on the internet. That's the
reason your address only works on your local network. The address only has a
meaning on your computers.

Your Road Runner IP, however, has a real meaning. It's unique, and can be
used to reach your router. But, your local server doesn't have this unique
IP. It cannot be reached from the internet, because no-one knows how to get
there. Anyone typing in your Road Runner-address in his browser, comes to
the web server port of your router. There's no such port on your router, so
the browser returns a 'server not found'-error.

What you'll have to do, is the following: configure your router so it
redirects requests to port 80 to your computer. For the external visitors,
it appears that your router suddenly has a web server on port 80. But that's
not the case, because your computer answers that request.
In Linux, this can be done using IP Masquerading, but I don't know how to
fix it with a router. If it's a good router, there should be a way to do it.

My advice: take a look at your router's manual and look for IP Masquerading.


-----Original Message-----
From: thelist-admin at lists.evolt.org
[mailto:thelist-admin at lists.evolt.org]On Behalf Of David Bindel
Sent: zaterdag 18 mei 2002 17:00
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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